perm filename BOOT.MAC[SS,SYS] blob
sn#725359 filedate 1983-10-01 generic text, type C, neo UTF8
COMMENT ⊗ VALID 00044 PAGES
C REC PAGE DESCRIPTION
C00001 00001
C00005 00002 <5-3-MONITOR>BOOT.MAC.16, 6-Jul-83 19:29:01, Edit by MRC
C00016 00003 TITLE BOOT - DISK AND TAPE BOOTSTRAP
C00017 00004 Debugging BOOT with EDDT
C00032 00005 ASSEMBLY PARAMETERS
C00038 00006 RP04 DEVICE REGISTERS
C00040 00007 INDEX BLOCK ADDRESS DEFINITIONS
C00043 00008 MACRO TO PERFORM IO OPERATIONS - USE IS INDEPENDENT OF WHICH DISK
C00049 00009 AC USAGE
C00053 00010 PHYSICAL CORE PARAMETERS
C00056 00011 DEFINE ALLOC(VAR,SIZ)
C00060 00012 DISK DEPENDENT DATA
C00065 00013 GLOBALS FOR THE REST OF THE MONITOR
C00066 00014 LOCATIONS IN DIR AREA
C00068 00015 IFN FT.PRT&2,<
C00078 00016 CODE: PHASE A.DATA
C00089 00017 SUBROUTINE TO LOCATE UNIT CONTAINING STRUCTURE TO BOOT FROM
C00096 00018 SUBR TO CHECK IF A CHAN IS PRESENT
C00099 00019 IFN FT.MTA,<
C00108 00020 PAGE FAULT HANDLER
C00111 00021 STRING READ FROM CONSOLE
C00114 00022 IFN FT.UDB,<
C00117 00023 IFE FT.MTA, <
C00121 00024 PUSH-DOWN POINTER
C00123 00025 VBOOT
C00127 00026 SETLCV: HRRZI T1,A%VORG GET ENDING PAGE ADDRESS
C00130 00027 THE COMMAND STRING PARSER
C00134 00028 THE STATE MACHINE
C00137 00029 THIS BLOCK OF DEFAULT VALUES IS COPIED INTO THE DATA AREA
C00141 00030 NUMBER INPUT SUBROUTINES
C00142 00031 TYPEOUT Subroutines
C00149 00032 IFE FT.MTA,<
C00159 00033 REDPAG: SKIPA T1,[.RHSTR!LR!RCLP!STLW!<-4&1777>B29!R4%CRD!GO] RH20 READ DATAO
C00161 00034 IFE FT.MTA, <
C00163 00035 IFE FT.MTA, <
C00168 00036 IFN FT.MTA,<
C00174 00037 SUBROUTINE TO GET THE PHYSICAL ADDRESS CORRESPONDING
C00177 00038 SUBROUTINE TO TEST IF A GIVEN VIRTUAL ADDRESS IS LEGAL
C00179 00039 ERROR MESSAGES
C00182 00040 SUBROUTINE TO CLEAR CORE
C00183 00041 GET, SAVE - not for EXE file
C00188 00042 Process EXE Files. GET file
C00195 00043 Process EXE Files. SAVE file
C00207 00044 Cleanup at end of program
C00209 ENDMK
C⊗;
;<5-3-MONITOR>BOOT.MAC.16, 6-Jul-83 19:29:01, Edit by MRC
;Stanford changes:
; Allow multiple-spindle RP07 structures on Score and Sumex
; Error handler doesn't force interactive mode if dumping
; UPD ID= 563, SNARK:<5.MONITOR>BOOT.MAC.15, 31-Mar-82 11:52:00 by LEACHE
;Update edit number for previous edit
; UPD ID= 551, SNARK:<5.MONITOR>BOOT.MAC.14, 18-Mar-82 15:46:21 by MILLER
;TCO 5.1762. Move code at start of FNDDEV to better place
; UPD ID= 366, SNARK:<5.MONITOR>BOOT.MAC.13, 16-Dec-81 16:06:16 by LEACHE
;Fix comment
; UPD ID= 86, SNARK:<5.MONITOR>BOOT.MAC.12, 31-Jul-81 09:58:22 by LEACHE
;Improve reporting of "structure not found" errors
; UPD ID= 33, SNARK:<5.MONITOR>BOOT.MAC.11, 15-Jul-81 08:14:26 by LEACHE
;More of previous edit
; UPD ID= 30, SNARK:<5.MONITOR>BOOT.MAC.10, 14-Jul-81 10:56:33 by LEACHE
;Remove all pretense of MTBOOT using a device name
; UPD ID= 2292, SNARK:<5.MONITOR>BOOT.MAC.9, 2-Jul-81 15:29:17 by LEACHE
;Correct debugging example
; UPD ID= 2291, SNARK:<5.MONITOR>BOOT.MAC.8, 2-Jul-81 14:13:56 by LEACHE
;Add /E switch (Load and go to location 141)
;Move KDDT to 500000 when debugging
; UPD ID= 2111, SNARK:<5.MONITOR>BOOT.MAC.7, 31-May-81 11:53:55 by LEACHE
;Shorten assembly error-messages
; UPD ID= 2110, SNARK:<5.MONITOR>BOOT.MAC.6, 31-May-81 11:43:46 by LEACHE
;Make error routine use STRNAM if CURNAM zero
;Force interactive mode on any error
; UPD ID= 2080, SNARK:<5.MONITOR>BOOT.MAC.5, 26-May-81 09:52:01 by LEACHE
;Display pass on swappable load
; UPD ID= 1979, SNARK:<5.MONITOR>BOOT.MAC.4, 12-May-81 13:18:14 by LEACHE
;Fix minor bug in MTBOOT
; UPD ID= 1970, SNARK:<5.MONITOR>BOOT.MAC.3, 10-May-81 10:28:19 by LEACHE
;Minor bug fix
; UPD ID= 1965, SNARK:<5.MONITOR>BOOT.MAC.2, 8-May-81 10:39:34 by LEACHE
;Rewrite error messages & error handling
; UPD ID= 1567, SNARK:<5.MONITOR>BOOT.MAC.14, 19-Feb-81 11:35:20 by LEACHE
;Bump maximum dumpable core to 3 meg
; UPD ID= 1566, SNARK:<5.MONITOR>BOOT.MAC.13, 18-Feb-81 09:30:23 by LEACHE
;Make BOOT complain if the dump file is too small
;Make /D & /S noops for MTBOOT
; UPD ID= 1518, SNARK:<5.MONITOR>BOOT.MAC.12, 4-Feb-81 21:04:23 by ZIMA
;Adjust comments on previous.
; UPD ID= 1517, SNARK:<5.MONITOR>BOOT.MAC.11, 4-Feb-81 17:40:44 by ZIMA
;TCO 5.1257 - Handle uninitialized memory for KS:
; Put BLT of 20-23 under conditional for KL only
; Do DBE scan for low 256K at GOTCOR
; Do DBE scan for high memory at SETEP2
;Fixes problems including trashed ROOT-DIRECTORY on powerfail and SWPPTP
;BUGHLTs on reload.
; UPD ID= 1492, SNARK:<5.MONITOR>BOOT.MAC.10, 26-Jan-81 12:08:55 by LEACHE
;Increase code pages from 3 to 4
; Add /I switch (Information)
; Place following under control of feature test switch FT.RP2:
; (1) symbols from RP20 microcode
; (2) attempt/do not attempt to load DX20B's
; UPD ID= 1369, SNARK:<5.MONITOR>BOOT.MAC.9, 18-Dec-80 11:36:58 by LEACHE
;Fix bug that prevented all directory entries from being written to dump file
; Section-align directory entries for dump file
; Add symbols PHYPAG, PHYADR, NMEG.
; UPD ID= 1270, SNARK:<4.RP20-UTILITIES>BOOT.MAC.6, 13-Nov-80 10:45:09 by WACHS
;Add support for TM78/TU78, fix code for RP07, make the magtape stuff
; table driven
; UPD ID= 1251, SNARK:<5.MONITOR>BOOT.MAC.6, 10-Nov-80 11:44:52 by LEACHE
;Stop BOOT from writing DX20 microcode to dump file. Add diagrams + comments
; Reload DX20 during auto-reload of monitor (currently for disk only)
; Display DX20 "type" during microcode load
; UPD ID= 732, SNARK:<5.MONITOR>BOOT.MAC.5, 5-Jul-80 22:15:17 by ZIMA
;TCO 5.1095 - FIX BOOT TO HANDLE UNINITIALIZED MEMORY INSTEAD OF HANGING.
; UPD ID= 657, SNARK:<5.MONITOR>BOOT.MAC.4, 16-Jun-80 17:22:54 by KONEN
;TCO 5.1063 -
;FIX BOOT TO LOOK AT APR SERIAL NUMBER ON HOME BLOCKS, BEFORE NAME 'PS'
; UPD ID= 553, SNARK:<5.MONITOR>BOOT.MAC.3, 24-May-80 21:27:04 by ZIMA
;TCO 5.1044 - FIX TYPO IN SETZM'ING 20-23.
;TCO 5.1045 - FIX TYPO IN MTBOOT PROMPT.
;TCO 5.1046 - INTERIM FIX FOR KS10 BOOT/MTBOOT HANGING, CLEAR KLINIK
; OUTPUT WORD DURING STARTUP.
; UPD ID= 547, SNARK:<5.MONITOR>BOOT.MAC.2, 21-May-80 16:18:11 by DBELL
;TCO 5.1043 - LOAD DX20 MICROCODE FOR RP20 DISKS
; UPD ID= 230, SNARK:<4.1.MONITOR>BOOT.MAC.63, 30-Jan-80 14:30:34 by ENGEL
;FIX NCSTPG FOR KS
; UPD ID= 229, SNARK:<4.1.MONITOR>BOOT.MAC.62, 30-Jan-80 08:12:35 by ENGEL
; UPD ID= 198, SNARK:<4.1.MONITOR>BOOT.MAC.61, 10-Jan-80 08:34:04 by ENGEL
;ADD <CR><LF> TO ERROR MESSAGES
;<4.MONITOR>BOOT.MAC.60, 18-Oct-79 16:57:29, EDIT BY DBELL
;TCO 4.2534 - DON'T LOAD DX20 MICROCODE IF DUMPING CORE OR AUTO-RELOADING
;<4.MONITOR>BOOT.MAC.59, 11-Oct-79 13:47:20, EDIT BY ENGEL
;MOVE PDL AWAY FROM LODTYP
;<4.MONITOR>BOOT.MAC.58, 5-Oct-79 16:55:50, EDIT BY ENGEL
;CHANGE EDDT TO KDDT IN LINK EXAMPLE
;<4.MONITOR>BOOT.MAC.55, 19-Jul-79 07:48:02, EDIT BY ENGEL
;<4.MONITOR>BOOT.MAC.54, 18-Jul-79 16:49:09, EDIT BY ENGEL
;ADD HELP TEXT TO DEBUGGING BOOT WITH EDDT
;<4.MONITOR>BOOT.MAC.53, 16-Jul-79 10:27:21, EDIT BY ENGEL
;ALLOW SYSTEM TO BOOT WHEN DX20 IS BAD
;<4.MONITOR>BOOT.MAC.52, 6-Jul-79 10:02:15, EDIT BY ENGEL
;<4.MONITOR>BOOT.MAC.51, 5-Jul-79 13:21:23, EDIT BY ENGEL
;FIX NCSTPG
;<4.MONITOR>BOOT.MAC.50, 2-Jul-79 09:04:45, EDIT BY ENGEL
;ADD HINTS FOR HOW TO DEBUG WITH EDDT
;<4.MONITOR>BOOT.MAC.49, 27-Jun-79 15:48:54, Edit by KONEN
;PRINT MTBOOT PROMPT
;<4.MONITOR>BOOT.MAC.48, 25-Jun-79 16:41:08, EDIT BY ENGEL
;DEFEND AGAINST MEMORY PARITY IN LOCATIONS 20-23
;<4.MONITOR>BOOT.MAC.47, 22-Jun-79 14:30:16, EDIT BY ENGEL
;ADD HIGH CORE SAVING AND RUBOUT CHANGES
;<4.MONITOR>BOOT.MAC.46, 10-Jun-79 14:44:37, Edit by MCLEAN
;<4.MONITOR>BOOT.MAC.45, 10-Jun-79 14:33:47, Edit by MCLEAN
;MOVE DECISION ON LOAD TYPE FOR BOOT OF SM FOR MORE ROOM
;<4.MONITOR>BOOT.MAC.44, 4-MAR-79 14:35:04, EDIT BY KONEN
;UPDATE COPYRIGHT FOR RELEASE 4
;<4.MONITOR>BOOT.MAC.43, 26-JAN-79 22:31:45, EDIT BY MCLEAN
;GET CORRECT NUMBER OF CYLS PER UNIT FOR RP07
;<4.MONITOR>BOOT.MAC.42, 26-JAN-79 22:25:14, EDIT BY MCLEAN
;ADD RP07
;<4.MONITOR>BOOT.MAC.41, 17-JAN-79 14:53:26, EDIT BY DBELL
;PUT IN THE SYMBOL A%VFST FOR THE FIRST ADDRESS OF BOOT, AND FIX
;TSTPAG AND SETLCV TO USE IT.
;<4.MONITOR>BOOT.MAC.40, 16-JAN-79 10:05:44, EDIT BY DBELL
;FIX TSTADR TO USE VFREE CORRECTLY.
;<4.MONITOR>BOOT.MAC.39, 15-JAN-79 10:34:32, EDIT BY DBELL
;TCO 4.2154 - MAKE THE UPPER LIMIT ON LOADING VARY ACCORDING TO .JBSYM,
; AND ADD THE /A SWITCH TO FORCE LOADING OF ALL OF A PROGRAM. CLEAN UP
; THE PAGE DEFINITIONS. EXTEND LOADING RANGE FROM 377 TO BOOT ITSELF.
;<4.MONITOR>BOOT.MAC.37, 7-NOV-78 18:12:26, EDIT BY MCLEAN
;FIX SAVING IF GT 512 K
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
; OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;
;COPYRIGHT (C) 1976,1977,1978,1979,1980,1981 BY DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
TITLE BOOT - DISK AND TAPE BOOTSTRAP
SUBTTL L.BOSACK 23-SEP-73 (OLD, OLD ORIGINAL)
SALL
SEARCH MONSYM,MACSYM
IFE STANSW,<
V%WHO==0
V%MAJOR==10
V%MINOR==0
V%EDIT==152
>;IFE STANSW
IFN STANSW,<
V%WHO==4
V%MAJOR==10
V%MINOR==0
V%EDIT==152
>;IFN STANSW
;FT.MTA==1 ;Load from magtape if non-zero
;Debugging BOOT with EDDT
COMMENT \
EEEEEEEEEEEEEEE DDDDDDDDDDDD DDDDDDDDDDDD TTTTTTTTTTTTTTT
EEEEEEEEEEEEEEE DDDDDDDDDDDD DDDDDDDDDDDD TTTTTTTTTTTTTTT
EEEEEEEEEEEEEEE DDDDDDDDDDDD DDDDDDDDDDDD TTTTTTTTTTTTTTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEEEEEEEEEEEEEE DDD DDD DDD DDD TTT
EEEEEEEEEEEEEEE DDD DDD DDD DDD TTT
EEEEEEEEEEEEEEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEE DDD DDD DDD DDD TTT
EEEEEEEEEEEEEEE DDDDDDDDDDDD DDDDDDDDDDDD TTT
EEEEEEEEEEEEEEE DDDDDDDDDDDD DDDDDDDDDDDD TTT
EEEEEEEEEEEEEEE DDDDDDDDDDDD DDDDDDDDDDDD TTT
Now that I have your attention, here are a few hints on debugging BOOT
with EDDT. The first thing that needs to be done is to create an .EXE file
with both BOOT and EDDT in it. This critical step is done with LINK
and would look something like the example below. To assemble BOOT
with proper debugging instructions follow the instructions at SETPTB.
(if you fail to do this, KDDT's pages will not be placed in the virtual
map and KDDT will hang once BOOT turns virtual memory on.)
Now for how to LINK it:
@LINK
*/SET:.LOW.:40000 ;BOOT CODE GOES HERE
*/SET:INCOD:500000 ;KDDT GOES HERE
*BOOT,KDDT,DXMCA.RMC/G (*BOOT,KDDT,DXMCA.RMC,DXMCE.RMC/G - TO INCLUDE
RP20 MICROCODE)
@SAVE BOOT.EXE
IF YOU GET A MESSAGE LIKE:
?LNKPCL PROGRAM TOO COMPLEX TO LOAD, SAVING AS FILE DSK:005LNK.EXE
SIMPLY RENAME THAT FILE TO BOOT.EXE - THE FILE IS OK.
TO TEST THE EXE FILE:
@GET BOOT.EXE
@START 500000
-- YOU SHOULD NOW GET A DDT PROMPT
ENT=
-- YOU SHOULD NOW SEE THE VALUE OF THE SYMBOL DISPLAYED (40000)
IF EITHER OF THESE TESTS FAIL, YOU BLEW IT AND MUST START OVER.
THE .LOW. PSECT IS BOOT. PSECT INCOD IS KDDT. THE ABOVE LINK COMMANDS LOAD
KDDT AT 500000 AND BOOT AT 40000. DXMCA.RMC IS THE TU70 MICROCODE AND
NEEDS TO BE LINKED EVEN IF YOU HAVE NO TU70. DXMCE.RMC IS THE RP20 MICROCODE
AND ALSO HAS TO BE LOADED.
STEP NUMBER TWO IS TO GET THE SYSTEM TO THE POINT WHERE IT HAS TYPED "BOOT>"
AT YOU (I.E. KLI AND FRIENDS). ASSUMING YOU ARE USING DIRECTORY <ENGEL>
THE FOLLOWING IS A TYPICAL EXAMPLE OF HOW TO LOAD THE BOOT BEING DEBUGGED:
BOOT><ENGEL>BOOT.EXE/L
BOOT>/G500000
EDDT
NOW YOU ARE IN EDDT AND CAN ACCESS ANY OF BOOT'S SYMBOLS THAT OCCUR BEFORE
FNDDEV. THERE ARE COUPLE OF TRICKY MANEUVERS TO GET TO FNDDEV.
ONCE AT FNDDEV YOU CAN USE ALL THE SYMBOLS AFTER FNDDEV.
THE FOLLOWING IS AN ATTEMPT TO STEP YOU THROUGH ALL OF THAT.
BUT FIRST, A FEW WORDS ABOUT THE GENERAL FLOW OF IT ALL.
BOOT DROPS IN TO WHEREVER YOU SET .LOW. (E.G. 40000). AT GOTCOR IT
MOVES ITSELF + N PRECEDING LOW CORE PAGES TO HIGH CORE, WHILE MOVING
AN EQUIVALENT NUMBER OF HIGH CORE PAGES TO LOW CORE. THIS LITTLE
GOODY CAUSES ALL THE SYMBOLS TO POINT TO INCORRECT ADDRESSES,
FOR A SHORT TIME. THE CODE THAT MOVES ALL THIS STUFF AROUND RUNS
IN THE ACS. BOOT ALSO BUILDS MAPS FOR THE ULTIMATE "CONO PAG,"
THAT STARTS THE MAPPING. ONE OF THESE MAPS IS BUILT AT SETPTB.
THERE IS A COMMENT THERE ABOUT HOW TO ASSEMBLE BOOT
TO GET IT TO BUILD A 256K MAP (THEREBY MAPPING EDDT INTO THE
MAPPED BOOT SPACE). ONCE BOOT HAS MAPPED ITSELF YOU CAN USE ALL THE
SYMBOLS PAST FNDDEV AND SET BREAKPOINTS AS FREELY AS YOU LIKE.
WHAT FOLLOWS IS A COOKBOOK APPROACH TO GETTING TO FNDDEV.
(WHEN WE LAST SAW THE COMPUTER IT HAD TYPED EDDT AT US. WE WILL CONTINUE FROM
THERE.)
1. SET A BREAKPOINT AT GOTCOR+7. THIS IS A JRST 1 TO THE CODE THAT MOVES BOOT
TO HIGH CORE.
2. TYPE ENT$G TO START BOOT.
3. AT THE BREAKPOINT SET A NEW BREAKPOINT AT AC 7 (I.E. 7$B).
4. TYPE $P
5. YOU HAVE HIT THE SECOND BREAKPOINT. NOW SET THE THIRD. SET THIS
BREAKPOINT AT 773000+TOP2-ENT (I.E. 773000+TOP2-ENT$B).
6. TYPE $P
7. TYPE THREE (3) ALT X'S ($X) TO GET PAST THE CONO PAG, TO FNDDEV.
IF THE KL GOES INTO LIMBO AFTER THE 1'ST $X, YOU PROBABLY FORGOT
TO MAKE THE DEBUGGING CHANGE AT SETPTB.
8. YOU ARE NOW AT FNDDEV. GET RID OF THE THREE BREAKPOINTS YOU SET.
THIS STEP IS VERY IMPORTANT AS YOU HAVE SET A BREAKPOINT IN THE ACS.
THUS, YOU HAVE TO TYPE 0$1B 0$2B 0$3B (OR $B TO REMOVE ALL BREAKPOINTS).
9. FROM HERE ON IT IS JUST LIKE MONITOR DEBUGGING. GOOD LUCK.
0 ************************* *************************
* * * *
* * * *
* * * *
* * * *
* * * *
LODBAS: ##*#######################*## SL *************************
# * * # *BBBBBBBBBBBBBBBBBBBBBBB*
# * * # *BBBBBBBBBBBBBBBBBBBBBBB*
# * * # *BBBBBBBBBBBBBBBBBBBBBBB*
# +++++++++++++++++++++++++ # *BBBBBBBBBBBBBBBBBBBBBBB*
# + MOVEABLE CODE + # *BBBBBBBBBBBBBBBBBBBBBBB*
# + + # *BBBBBBBBBBBBBBBBBBBBBBB*
# + + # *BBBBBBBBBBBBBBBBBBBBBBB*
LODTOP: ##+#######################+## *************************
MCSPAG: + MOVING CODE + * *
+ + * *
+++++++++++++++++++++++++ * *
+ MICRO CODE + * *
+ + * *
+ + * *
+ + * *
MCEPAG: +++++++++++++++++++++++++ EL * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
TOPBAS: %%*%%%%%%%%%%%%%%%%%%%%%%%*%% *************************
% * * % *MMMMMMMMMMMMMMMMMMMMMMM*
% * * % *MMMMMMMMMMMMMMMMMMMMMMM*
% * * % *MMMMMMMMMMMMMMMMMMMMMMM*
% * * % *MMMMMMMMMMMMMMMMMMMMMMM*
% * * % *MMMMMMMMMMMMMMMMMMMMMMM*
% * * % *MMMMMMMMMMMMMMMMMMMMMMM*
% * * % *MMMMMMMMMMMMMMMMMMMMMMM*
TOPTOP: %%*%%%%%%%%%%%%%%%%%%%%%%%*%% *************************
* CORE > 256K * * *
* (IF PRESENT) * * *
* * * *
* * * *
************************* *************************
LEGEND: BOOT IN PHYSICAL MEMORY MEMORY BEFORE PAGE MOVEMENT
+ = BOOT DROP-IN WINDOW B = PAGES OWNED BY BOOT
# = SOURCE AREA M = MONITOR PAGES
% = TARGET AREA SL = START LOST PAGES
EL = END LOST PAGES
0 ************************* *************************
* * * *
* * * *
* * * *
* * * *
* * * *
LODBAS: ************************* SL *************************
*MMMMMMMMMMMMMMMMMMMMMMM* *???????????????????????*
*MMMMMMMMMMMMMMMMMMMMMMM* *???????????????????????*
*MMMMMMMMMMMMMMMMMMMMMMM* *???????????????????????*
*MMMMMMMMMMMMMMMMMMMMMMM* *???????????????????????*
*MMMMMMMMMMMMMMMMMMMMMMM* *???????????????????????*
*MMMMMMMMMMMMMMMMMMMMMMM* *???????????????????????*
*MMMMMMMMMMMMMMMMMMMMMMM* *???????????????????????*
LODTOP: ************************* *???????????????????????*
MCSPAG: * * *???????????????????????*
* * *???????????????????????*
* * *???????????????????????*
* * *???????????????????????*
* * *???????????????????????*
* * *???????????????????????*
* * *???????????????????????*
MCEPAG: * * EL *************************
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
TOPBAS: ************************* * *
*BBBBBBBBBBBBBBBBBBBBBBB* * *
*BBBBBBBBBBBBBBBBBBBBBBB* * *
*BBBBBBBBBBBBBBBBBBBBBBB* * *
*BBBBBBBBBBBBBBBBBBBBBBB* * *
*BBBBBBBBBBBBBBBBBBBBBBB* * *
*BBBBBBBBBBBBBBBBBBBBBBB* * *
*BBBBBBBBBBBBBBBBBBBBBBB* * *
TOPTOP: ************************* * *
* * * *
* * * *
* * * *
* * * *
* * * *
************************* *************************
LEGEND: MEMORY AFTER PAGE MOVEMENT ADDRESS SPACE OF DUMP
B = PAGES OWNED BY BOOT ? = LOST PAGES (FILE HOLE)
M = MONITOR PAGES SL = START LOST PAGES
EL = END LOST PAGES
\ ;END COMMENT BLOCK
;ASSEMBLY PARAMETERS
IFNDEF PORG,<PORG==↑D64*↑D512> ;PHYSICAL ORIGIN OF CODE
IFNDEF FT.UDB,<FT.UDB==0> ;USER MODE DEBUG
IFNDEF FT.MTA,<FT.MTA==0> ;MAG TAPE PART 2 IF NONZERO
IFNDEF FT.EXE,<FT.EXE==1> ;LOAD EXE FORMAT FILES
IFNDEF FT.PRT,<FT.PRT==3> ;0 - JUST GLOBALS FOR SWPMON
;1 = STANDALONE PART 1
;2 = PART 2
;3 = STANDALONE PART 1&2
IFWAITS<
IFE FT.MTA,< PRINTX %This is the WAITS version of BOOT >
IFN FT.MTA,< PRINTX %This is the WAITS version of MTBOOT >
>;IFWAITS
;PROCESSOR (ETC.) BITS
AP.RES==1B19 ;IOB RESET (SAME ON KI AND KL)
PGCLKE==1B18 ;CACHE LOOK
PGCLDE==1B19 ;CACHE LOAD
PGKLPG==1B21 ;KL PAGE
AP.CLR==1B22
AP.SET==1B23
AP.NXM==1B25
AP.RNX==AP.CLR!AP.NXM
IMMPTR==1B2!1B4!1B6 ;IMMEDIATE PAGE POINTER.
;1B2 = IMMEDIATE POINTER
;1B4 = WRITEABLE
;1B6 = CACHEABLE
;STATE TABLE DEFINATION
;
STTSIZ==↑D25 ;SIZE OF STATE TABLE
RH0==540
ICA==0 ;INITIAL CHANNEL CONTROL WORD ADDRESS IN EPT
.RHRAE==1B24 ;REGISTER ACCESS ERROR
.RHMBR==1B25 ;MASSBUS RESET
.RHCTE==1B26 ;CLEAR TRANSFER ERROR
.RHMBE==1B27 ;MASSBUS ENABLE
.RHCLP==1B28 ;RESET CLP
.RHAIE==1B30 ;ATTENTION INTERRUPT ENABLE
.RHSTP==1B31 ;STOP TRANSFER
.RHDON==1B32 ;DONE
.RHSBR==70B5 ;SBAR
.RHSTR==71B5 ;STCR
.RHIVR==74B5 ;INTERRUPT VECTOR REGISTER
.TMCSR==00B5 ;CONTROL REG.
.TMRDF==71 ;READ FORWARD AND GO
.TMBSF==33 ;BACKSPACE BLOCK
.TMRWF==07 ;REWIND
.TMDSR==01B5 ;DEVICE STATUS REG
.TMERR==02B5 ;ERROR REGISTER
TMSPIP==20000
TMSMOL==10000 ;MEDIUM ON LINE(TELL YOU FORTUNE, 10KCS?)
TMSDRY==200 ;DRIVE/FORMATTER READY
TMSIDB==10 ;PE ID BURST SEEN
.TMATR==04B5 ;ATTENTION SUMMARY REGISTER
.TMFCR==05B5 ;FRAME COUNT REG.
.TMDTR==06B5 ;DRIVE TYPE REG.
.TMTCR==11B5 ;TAPE CONTROL REG.
TMCD8==1400 ;800 BPI
TMCD16==2000 ;1600 BPI
;DX20 ONLY
;
.DXATP==60 ;DX20 DEVICE TYPE CODE FOR TAPES
.DXBTP==61 ;DX20 DEVICE TYPE CODE FOR RP20 DISKS
.TDSTR==20B5 ;DRIVE STATUS/STATUS INDEX
.TDDEB==1B25 ;DEVICE END
.TDDNR==21B5 ;DRIVE NUMBER, DRIVE MODE, DATA MODE
.TDMOD==1B23!14B27 ;1600 BPI, CORE DUMP MODE
.TDTER==23B5 ;TRACK IN ERROR, FLAGS
.TDE0R==26B5 ;EXTENDED STATUS REG 0
.TDMNR==3B5 ;MAINTENANCE REGISTER
.TDSCB==1B31 ;SINGLE CYCLE THE DX20
.TDSTB==1B33 ;START DX20
.TDSTR==20B5 ;ENDING STATUS
.TDTCR==21B5 ;CONTROL REGISTER
.TDFLR==23B5 ;FLAGS
.TDAYR==24B5 ;ASYNCHRONOUS STATUS
.TDE0R==26B5 ;EXTENDED STATUS REGISTER 0
.TDE1R==27B5 ;EXTENDED STATUS REGISTER 1
.TDIRR==30B5 ;IR REGISTER
.TDPCR==31B5 ;PC REGISTER
.TDICB==1B20 ;ENABLE IR FROM CRAM
.TDCIB==1B21 ;ENABLE CRAM FROM IR
.TDPEB==1B22 ;ENABLE PC LOAD
.TDPIB==1B23 ;ENABLE PC AUTO INCREMENT
.TDIBR==36B5 ;IBUS AND BR REGISTER
.TDATB==1B20 ;ATTENTION
.TDCEB==1B21 ;COMPOSITE ERROR BIT
.TDMPR==1B23 ;MICROPROCESSOR RUNNING BIT
.T8TYP==101 ;TM78 DRIVE TYPE
.T7ICD==1B5 ;INTERRUPT CODE (DATA XFER)
T7.ICD==77 ;MASK FOR ALL INTERRUPT CODES
ICD.DN==1 ;DONE, NO ERRORS
ICD.SR==21 ;SHORT RECORD
ICD.EF==2 ;END OF FILE
ICD.BT==3 ;BOT
.T7FMT==2B5 ;FORMAT
T7.SER==100000 ;SUPPRESS ERROR RECOVERY (REPOSITIONING)
T7.CDP==30000 ;CORE-DUMP
T7.1RC==4 ;READ 1 RECORD
.T7BC==5B5 ;BYTE COUNT
.T7SR==7B5 ;STATUS REGISTER
T7.RDY==100000 ;DRIVE IS READY
.T7ICN==13B5 ;INTERRUPT CODE (NON DATA XFER)
.T7ND0==14B5 ;NON-DATA-XFER COMMAND, DRIVE 0
.T7TMS==21B5 ;TM STATUS
T7.TMR==1B20 ;TM READY
T7.REW==7 ;REWIND
T7.SNS==11 ;SENSE
T7.BSR==23 ;BACKSPACE RECORD
T7.RDF==71 ;READ
LR==1B6 ;LOAD REGISTER
GO==1B35 ;GO BIT IN CONTROL REGISTER
RCLP==1B7 ;RESET CLP (IN DATAO)
STLW==1B10 ;STORE LOGOUT STATUS WORDS (IN DATAO)
; RP04 DEVICE REGISTERS
R4%CSR==00B5 ;DEVICE CONTROL REGISTER
R4%DSR==01B5 ;DEVICE STATUS REGISTER
R4%ERR==1B20 ;COMPOSITE ERROR BIT
R4%DRY==1B28 ;DRIVE READY FLAG
R4%ATN==04B5 ;RP04 PSEUDO-ATTENTION REGISTER
R4%DST==05B5 ;DESIRED SECTOR/TRACK REGISTER
R4%DTR==06B5 ;DRIVE TYPE REGISTER
R4%DCA==12B5 ;DESIRED CYLINDER REGISTER
RH%XFR==40B5 ;RH INITIATE DATA TRANSFER REGISTER
R4%TYP==777B35 ;DEVICE TYPE FIELD IN TYPE REGISTER
.R4TYP==20 ;RP04 DEVICE TYPE CODE
.R5TYP==21 ;RP05 DEVICE TYPE CODE
.R6TYP==22 ;RP06 DEVICE TYPE CODE
.R7TYP==42 ;RP07 DEVICE TYPE CODE
.R3TYP==24 ;RM03 DEVICE TYPE CODE
R4%CSK==02B34 ;RP04 SEEK FUNCTION
R4%CRC==03B34 ;RE-CALIBRATE FUNCTION IN CONTROL REGISTER
R4%CDC==04B34 ;RP04 DRIVE CLEAR FUNCTION
R4%RIP==10B34 ;READ-IN PRESET FUNCTION
R4%CPA==11B34 ;PACK ACKNOWLEDGE FUNCTION IN CONTROL REGISTER
R4%CWR==30B34 ;RP04 WRITE FUNCTION
R4%CRD==34B34 ;RP04 READ FUNCTION
RHERR==775120 ;RH10 CONI ERROR BITS
NRETRY==5 ;NUMBER OF TIMES TO RETRY
TIMOUT==↑D50000 ;COUNT FOR SOJG TIMEOUT
MAXCHN==7 ;MAX # OF CHANNELS
MAXDRV==7 ;MAX NUMBER OF DRIVES/CHANNEL
; INDEX BLOCK ADDRESS DEFINITIONS
STGADM==<MASKB 12,35> ;MASK FOR STORAGE ADDRESS
MSKSTR IDXADR,,STGADM ;STORAGE ADDR MASK
; EXE FILE DEFINITIONS
.EXDIR==1776 ;DIRECTORY BLOCK TYPE
.EXEND==1777 ;END BLOCK TYPE
.EXENT==1775 ;ENTRY BLOCK TYPE
.EXVER==1774 ;VERSION BLOCK TYPE
; JOB DATA DEFINITIONS
.JBSYM==116 ;SYMBOL TABLE POINTER
; STRUCTURE DEFINITIONS
DEFSTR (DIDIR,A%FP0,17,18) ;DIRECTORY BLOCK TYPE (=.EXDIR)
DEFSTR (DISIZ,A%FP0,35,18) ;SIZE OF DIRECTORY BLOCK
DEFSTR (DIFLG,0,8,9) ;FLAGS
DEFSTR (DI%WRT,0,2,1) ;WRITE ACCESS ALLOWED BIT
DEFSTR (DIFIL,0,35,27) ;FILE PAGE NUMBER
DEFSTR (DIRPT,1,8,9) ;REPEAT COUNT
DEFSTR (DIPRO,1,35,27) ;PROCESS PAGE NUMBER
DEFSTR (VBTYP,0,17,18) ;ENTRY VECTOR BLOCK TYPE (=.EXENT)
DEFSTR (VBSIZ,0,35,18) ;SIZE OF ENTRY VECTOR BLOCK (=.VBSIZ)
DEFSTR (VBCNT,1,35,36) ;ENTRY VECTOR COUNT
DEFSTR (VBADR,2,35,36) ;ADDRESS OF ENTRY VECTOR
DEFSTR (EBTYP,0,17,18) ;BLOCK TYPE CODE FOR END BLOCK (=.EXEND)
DEFSTR (EBSIZ,0,35,18) ;SIZE OF END BLOCK
.DISIZ==2 ;SIZE OF DESCRIPTORS
.EBSIZ==1 ;SIZE OF END BLOCK
.VBSIZ==4 ;SIZE OF ENTRY VECTOR BLOCK
; DEFAULT SIZE AND ADDRESS OF ENTRY VECTOR IN DUMP FILE
EVADR==140 ;DEFAULT STARTING ADDRESS
EVLEN==1 ;DEFAULT LENGTH OF VECTOR
;MACRO TO PERFORM IO OPERATIONS - USE IS INDEPENDENT OF WHICH DISK
; MACRO DEFINITION FOR RP04
DEFINE IOOP(OP,OPR)
<IFIDN <OP><CLEAR>,<
CALL IOXCT
CONO .-.,2000
CALL IOXCT
CONO .-.,4600
> ;END IFIDN CLEAR
IFIDN <OP><SKIPNOERR>,<
CALL IOXCT
CONSZ .-.,RHERR ;RH ERROR BITS
> ;END IFIDN SKIPNOERR
IFIDN <OP><XCTOP>,<
CALL IOXCT
DATAO .-.,OPR ;EXECUTE OP
> ;END IFIDN XCTOP
IFIDN <OP><SKIPDONE>,<
CALL IOXCT
CONSO .-.,.RHDON ;SKIP IF DONE
> ;END IFIDN SKIPDONE
> ;END DEFINE IOOP
; MACRO TO SAVE AND RESTORE PI ASSIGNMENT
DEFINE SAVPI(AC) <>
DEFINE RESPI(AC) <>
;AC USAGE
F==0 ;FLAGS
T1=1 ;GP TEMP
T2=2 ; ...
T3=3 ; ...
T4=4 ; ...
Q1=5 ;GENERALLY HOLDS A SINGLE CHARACTER
Q2=6 ;BYTE POINTER TO AN INPUT STRING
Q3=7 ;BYTE POINTER TO AN OUTPUT STRING
P1=10 ;OFTEN PRESERVED
P2=11 ; ..
P3=12 ;A NUMBER
P4=13 ;DESTINATION POINTER (DISK ADDR, BYTE PTR)
P5=14 ;DISK ADDRESS OR PARSER STATE
P6=15 ;DEVICE TYPE INDEX
TM.IDX==0 ;TM02/TM03
DA.IDX==1 ;DX20 FOR TAPES
T8.IDX==2 ;TM78
DB.IDX==3 ;DX20 FOR RP20 DISKS
CX=16 ;RETURN ADDRESS FOR VBOOT ENTRY FROM MONITOR
; NO INTERNAL BOOT CODE MUST USE THIS AC!!!
P=17 ;STACK POINTER
;BIT ALLOCATION IN F
F.WRIT==1B0 ;WRITE FILE IF ON
F.PHYS==1B1 ;PHYSICAL ADDRESSES IF ON, VIRTUAL IF OFF
F.CLR==1B2 ;CLEAR CORE IF ON
F.STRT==1B3 ;START AFTER LOAD IF ON
F.ACT==1B4 ;SOME ACTION REQUEST IF ON
F.BACK==1B5 ;BACKUP SCANNER IF ON
F.OUT==1B6 ;THIS STATE HAS PRODUCED OUTPUT IF ON
F.DUMP==1B7 ;DUMP VS SAVE IF ON
F.EDDT==1B8 ;LOAD AND START AT LOCATION 141
F.ALL==1B9 ;LOAD ALL PAGES FROM 0 TO VFREE
F.NCHL==1B10 ;DON'T USE .JBSYM TO CHANGE PAGE LIMITS
F.INFO==1B11 ;DISPLAY PROGRAM INFORMATION
F.DPER==1B16 ;DUMP ERROR - FILE TOO SMALL
F.IOER==1B17 ;IO ERROR DURING DUMP
;BITS PROVIDED BY KLINIT ON A SPECIAL LOAD CONDITION
F11.LD==1B0 ;DO DEFAULT LOAD
F11.DM==1B1 ;DO DUMP OF CORE
;START LOCATION FOR /E
ELOC==141
;FDB STRUCTURE DEFINITIONS
DEFSTR (FBEXL,.FBEXL,35,33) ;LINK TO NEXT EXTENSION FDB
DEFSTR (FBCTL,.FBCTL,35,36) ;CONTROL BITS FROM FDB
DEFSTR (FBADR,.FBADR,35,36) ;DISK ADDRESS OF INDEX BLOCK
DEFSTR (FBGEN,.FBGEN,17,18) ;GENERATION # OF FILE
DEFSTR (FBGNL,.FBGNL,35,33) ;LINK TO NEXT GENERATION
DEFSTR (FBNAM,.FBNAM,35,36) ;POINTER TO NAME STRING
DEFSTR (FBEXT,.FBEXT,35,36) ;POINTER TO EXTENSION STRING
DEFSTR (FBBYV,.FBBYV,35,36) ;POINTER TO PAGE COUNT WORD
.SYMAD==0
.SYMVL==1
DEFSTR (SYMET,.SYMAD,2,3) ;SYMBOL TABLE ENTRY TYPE
DEFSTR (SYMAD,.SYMAD,35,33) ;ADDRESS OF BLOCK IN DIR FOR THIS SYM
DEFSTR (SYMVL,.SYMVL,35,36) ;FIRST FIVE CHARS OF NAME
;PHYSICAL CORE PARAMETERS
;HOW MANY MEGS CAN WE DUMP?
;NMEG = INTEGRAL MEGS,,FRACTIONAL MEGS (# 1/4 MEGS)
NMEG=3,,0
NCSTPG==(<<<NMEG>&<-1,,0>>*4>+<<NMEG>&<0,,-1>>)
;NUMBER OF CST PAGES - THIS DETERMINES THE
; MAXIMUM AMOUNT OF CORE THAT CAN BE DUMPED
;100 IS A SAFE NUMBER FOR ANY SIZE MACHINE.
; 1 CST PAGE = 256K CORE = 1000↑D8 PAGES
; 4 CST PAGES = 1 MEG
PHYPAG== <NCSTPG*1000>-1 ;HIGHEST PHYSICAL PAGE WE CAN DUMP
PHYADR== PHYPAG*1000 ;ADDRESS OF HIGHEST PHYSICAL PAGE WE CAN DUMP
;STORAGE ALLOCATION - *NOTE* ADDRESSES USED ARE ALL VIRTUAL!
; THE ORDER OF THESE CANNOT BE CHANGED INDISCRIMINATELY
A%EDDT==5 ;ADDRESS OF EDDT FOR DEBUGGING
EDDTSZ==40 ;NUMBER OF PAGES TO MAP FOR EDDT
;PAGES USED FOR BOOT. ALLOCATION IS DONE UPWARD FROM VORG (HIGHER TO
; LOWER ADDRESSES).
;WHEN DONE, VFREE IS THE LAST FREE PAGE BEFORE BOOT BEGINS.
DEFINE PG(ADDR,SIZE<1>),<
VFREE==VFREE-<SIZE> ;;MOVE FREE PAGE DOWN BY REQUIRED PAGES
ADDR==<VFREE+1>←9 ;;THEN DEFINE DESIRED ADDRESS
>
VORG==777 ;LAST PAGE USED BY BOOT
VFREE==VORG ;INITIALIZE LAST FREE PAGE
PG A%CODE,4 ;FOUR CODE PAGES
PG A%FP0 ;FILE PAGE ZERO WINDOW
PG A%XB ;INDEX BLOCK BUFFER
PG A%SXB ;SUPER INDEX BLOCK BUFFER
PG A%CST,NCSTPG ;CORE STATUS TABLE PAGES
PG A%PTB ;PAGE TABLE PAGE
PG A%EPT ;EXEC PROCESS TABLE
PG A%DPG ;DIRECTORY HEADER PAGE
PG A%DIR ;DIRECTORY DATA PAGE
A%VFST==<VFREE+1>←9 ;ADDRESS OF FIRST VBOOT PAGE
A%VORG==VORG←9 ;ADDRESS OF LAST VBOOT PAGE
A%DATA==A%CODE ;LOCATION WHERE DATA GOES
VFREE==VFREE ;FORCE VALUE OF VFREE INTO LISTING
DEFINE ALLOC(VAR,SIZ)
<VAR=A.DATA
IFNB <SIZ><A.DATA==A.DATA+SIZ>
IFB <SIZ><A.DATA==A.DATA+1>
>
A.DATA==A%DATA ;INITIALIZE COUNTER
;NOTE -- DATA BETWEEN Z.STRT AND Z.END GETS ZEROED ON EACH COMMAND
Z.STRT==A.DATA
ALLOC(ISTRNG) ;INPUT STRING POINTER SAVE VARIABLE
ALLOC(START) ;STARTING ADDRESS
;DO NOT REORDER THE FOLLOWING WITHOUT CHANGING DEFAULT PROCESSING
DEFBEG==A.DATA ;BEGINNING OF DEFAULTED AREA
ALLOC(FILSTR) ;POINTER TO FILE NAME STRING
ALLOC(DIRSTR) ;POINTER TO DIRECTORY STRING
ALLOC(EXTSTR) ;POINTER TO FILE EXTENSION STRING
ALLOC(VERSTR) ;POINTER TO VERSION STRING
ALLOC(SWSTR) ;POINTER TO SWITCH STRING
ALLOC(UBSTR) ;POINTER TO UPPER BOUND STRING
ALLOC(LBSTR) ;POINTER TO LOWER BOUND STRING
DEFEND==A.DATA-1 ;END OF DEFAULTED DATA AREA
;END OF DO NOT REORDER
ALLOC(D$FIL,8) ;STRING STORAGE FOR FILE NAME
ALLOC(D$DIR,8) ;STRING STORAGE FOR DIR NAME
ALLOC(D$EXT,8) ;STRING STORAGE FOR EXTENSION STRING
ALLOC(D$VER,2) ;STRING STORAGE FOR VERSION STRING
ALLOC(D$SW,2) ;STRING STORAGE FOR SWITCH STRING
ALLOC(D$ISTR,↑D25) ;STRING STORAGE FOR INPUT STRING
ALLOC(D$UB,2) ;STRING STORAGE FOR UPPER BOUND STRING
ALLOC(D$LB,2) ;STRING STORAGE FOR LOWER BOUND STRING
ALLOC(VERNUM) ;VERSION NUMBER OF FILE
ALLOC(LWRLIM) ;LOWER PAGE LIMIT FOR GET/SAVE
ALLOC(UPRLIM) ;UPPER PAGE LIMIT FOR GET/SAVE
ALLOC(FNDSTR) ;STRING POINTER TO CURRENT NAME STRING
; DO NOT CHANGE THE ORDER OF THE FOLLOWING TWO WORDS
ALLOC(FNDSTE) ;STRING POINTER TO CURRENT EXT
ALLOC(FNDSTV) ;CURRENT VERSION NUMBER
; ***** NOTE WELL ***** FNDSTE MUST BE FOLLOWED IMMEDIATELY BY
; FNDSTV BECAUSE THEY ARE STORED USING A
; DMOVEM INSTRUCTION IN ROUTINE GETIDX !
;DISK DEPENDENT DATA
;DO NOT REORDER WITHOUT CHANGING SWPMON
ALLOC(MAXUNI) ;LARGEST LOGICAL UNIT IN STR
;END OF DO NOT REORDER
ALLOC(FNDCMD) ;BYTE POINTER TO INITIAL TYPEIN
ALLOC(DEV) ;POINTER/ SIXBIT DEVICE NAME
Z.END==A.DATA-1
; FOLLOWING LOCATIONS NOT CLEARED ON EACH COMMAND
DSKSIZ==↑D8
ALLOC(FILPAG) ;PAGE # READ FROM FILE
ALLOC(STRNAM) ;SIXBIT NAME OF FS OR DEV (I.E. MT:)
ALLOC(CURNAM) ;STR NAME BOOT IS CURRENTLY LOOKING AT
ALLOC(DSKTYP) ;UNIT TYPE FOR DISK STRUCTURES
TAPTYP==DSKTYP ;UNIT TYPE FOR TAPES
ALLOC(NUMCYL) ;NUMBER OF CYLINDERS PER UNIT FOR THIS TYPE
ALLOC(DSKTAB,DSKSIZ) ;LOGICAL/PHYSICAL MAPPING
ALLOC(CURPAG) ;CURRENTLY MAPPED DIRECTORY PAGE
; ** CAUTION: DO NO INITIALIZE TO 0 **
ALLOC(DIORG) ;HOLDS DISK INDEX ORIGIN
ALLOC(XBNUM) ;-1 FOR SHORT FILE, XB # OF MAPPED XB
; IF THIS FILE IS A LONG FILE
ALLOC(MAXCOR) ;MAX CORE AVAILABLE
IFN FT.MTA,<ALLOC(DIRFLG)> ;NON-ZERO IF EXE DIRECTORY HAS BEEN READ
ALLOC(LODBAS) ;START OF SOURCE AREA (SEE DIAGRAMS)
ALLOC(LODTOP) ;END OF SOURCE AREA
ALLOC(TOPBAS) ;START OF TARGET AREA (SEE DIAGRAMS)
ALLOC(TOPTOP) ;END OF TARGET AREA
ALLOC(LODTYP) ;TYPE OF MONITOR LOAD: 0,DEFAULT - NO OPR COMMAND
ALLOC(MCSPAG) ;STARTING MICROCODE PAGE
; THIS PAGE ALSO CONTAINS THE BOOT MOVING CODE
ALLOC(MCEPAG) ;ENDING MICROCODE PAGE
ALLOC(DXAMCV) ;WORD TO HOLD DXMCA MCODE VERSION
ALLOC(DXBMCV) ;WORD TO HOLD DXMCB MCODE VERSION
ALLOC(NOLDDX) ;NON-ZERO IF WE DON'T LOAD DX20 MICROCODE
ALLOC(PASS) ;INDICATES WHICH PASS OF UNIT-SEARCH CODE
ALLOC(MONLOD) ;0 = LOADING RESIDENT MONITOR
;N = N'TH PASS LOADING SWAPABLE MONITOR
ALLOC(PFLAGS) ;PROGRAM FLAGS SAVE-WORD
ALLOC(DEXEPC) ;DUMP.EXE DISK PAGE COUNT
ALLOC(PGCNT) ;COUNT OF CORE PAGES WRITTEN TO DUMP.EXE
ALLOC(ZOOT,5) ;THIS IS TO PUT SOME SPACE BETWEEN THE PDL AND
;LODTYP. WITH ALL THE -N(P) ACCESS I SUSPECT
;A BUG IN SOME OF THEM BUT CAN'T PROVE IT.
; NON-0, PROMPT AND TAKE OPR COMMAND
PDLEN==20 ;PUSH DOWN STACK SIZE
ALLOC(PDL,PDLEN) ;PUSH DOWN STACK
ALLOC (DTCNOW) ;ALLOCATE CONO WORD
ALLOC(PIA) ;RH20 PI ASSIGNMENT
ALLOC(INIVEC) ;RH20 INITIAL INT VECTOR REGISTER
ALLOC(APRSER) ;CPU SERIAL NUMBER
ENTFLG==400000 ;ENTRY IN USE FLAG IN DSKTAB
ICCW==20
LCORAD==24 ;LOWEST CORE ADDR DUMPED/LOADED
TIMLOC==23 ;LOCATION OF TIME BASE
;.DMPUL==1000*NCSTPG-1 ;UPPER PAGE LIMIT FOR DUMPING
N.BKPG==4
N.SCL3==↑D148 ;SECTORS PER CYL (RM03)
N.SCL4==↑D380 ;SECTORS PER CYL (RP04/RP05/RP06)
N.SCL7==↑D1376 ;SECTORS PER CYL RP07
N.CLP3==↑D820 ;CYLS PER UNI (RM03)
N.CLP4==↑D400 ;CYLS PER UNI (RP04/5)
NOWAITS<
N.CLP6==↑D800 ;CYLS PER UNI (RP06)
N.CLP7==↑D629 ;CYLS PER UNI (RP07)
>;NOWAITS
IFWAITS<
N.CLP6==↑D815 ;CYLS PER UNI (RP06)
N.CLP7==↑D630 ;CYLS PER UNI (RP07)
>;IFWAITS
N.STK3==↑D30 ;SECTORS PER TRACK (RM03)
N.STK7==↑D43 ;SECTORS PER TRACK (RP07)
N.STK4==↑D20 ;SECTORS PER TRACK (RP04)
;GLOBALS FOR THE REST OF THE MONITOR
VBSTRT==:A%DIR ;START OF VBOOT PRIVATE AREA
VBEPT==:A%EPT ;WHERE VBOOT EXPECTS EPT TO BE MAPPED
VBEND==:A%VORG ;VBOOT ITSELF
VBDDAT==:DIORG ;START OF VBOOT DISK DATA AREA
BUTRXB==:151 ;ROOT XB
BUTMUN==:152
BUTDRT==:153
BUTCMD==:163
BUTPGS==:202 ;VBSTRT,,VBEND
BUTEPT==:203 ;VBEPT
BUTPHY==:204 ;# OF PAGES TO MAP,,# OF FIRST PHYSICAL PAGE
BUTVIR==:205 ;VIRTUAL ADDRESS OF FIRST PAGE TO MAP
IFE FT.PRT,<END> ;END HERE IF SYMBOLS-ONLY ASSEMBLY
;LOCATIONS IN DIR AREA
DIRNUM==A%DIR+2 ;DIR NUMBER
SYMBOT==A%DIR+3 ;BOTTOM OF ST AREA
SYMTOP==A%DIR+4 ;TOP OF ST AREA
HOMNAM==A%FP0+200+0 ;SIXBIT /HOM/
HOMID==A%FP0+200+1 ;PACK ID
HOMSNM==A%FP0+200+3 ;STRUCTURE NAME
HOMLUN==A%FP0+200+4 ;# UNI IN STR,,THIS UNI #
HOMRXB==A%FP0+200+10 ;ROOT INDEX BLOCK
HOMSER==A%FP0+200+164 ;APR SERIAL NUMBER
HOMCOD==A%FP0+200+176 ;FUNNY CODE
CODHOM==707070 ;TYPE CODE FOR HOME BLOCK
; EXEC PROCESS TABLE LOCATIONS
EPTEST==540 ;INDEX TO EXEC SECTION TABLE
EPTATR==421 ;INDEX TO ARITHMETIC TRAP INSTRUCTION
EPTPFW==503 ;INDEX TO PAGE FAIL WORD
EPTSPT==760 ;INDEX TO SPT (ONE WORD TABLE FOR VBOOT)
; OPDEF FOR STORING VALUES IN PAGER REGISTERS
OPDEF XCTU [XCT 4,0] ;PXCT DEFINITION
;OTHER OPDEFS
OPDEF CLRPT [701100,,0] ;CLEAR PAGING MEMORY
; PAGER REGISTERS
CSTMSK==0 ;CST MASK, ANDED WITH CST ENTRY
CSTDTA==1 ;CST DATA, IORED WITH CST ENTRY
CSTADR==2 ;CST BASE ADDRESS
SPTADR==3 ;SPT BASE ADDRESS
;KL-10 SPECIFIC UPT DEFINITIONS
UPTPFW==500 ;PAGE FAIL ADDRESS
UPTPFO==502 ;PAGE FAIL PC WORD
;ERROR MESSAGE MACRO
DEFINE $ERROR (CODE)
< JRST [MOVEI Q2,CODE
JRST ERRTYP]
>
IFN FT.PRT&2,<
; ***** MAIN ENTRY POINT AND INITIALIZATION *****
;THE FRONT END AND BOOT:
; 1. ON AN AUTO-RELOAD (ALIAS "SPECIAL" LOAD):
; A. FRONT END SETS IN AC0:
; 1. 1B0 - NO PROMPTING
; 2. 1B1 - DUMP
; 3. B2-B35 - ZERO
; B. FRONT END STARTS BOOT AT ENT+1
;
; 2. ON A DIALOG-LOAD (ALIAS "DEFAULT" LOAD, "MANUAL" LOAD, ETC):
; A. FRONT END DOES NOT TOUCH AC0
; B. FRONT END STARTS BOOT AT ENT
; SET UP RELOCATION CONSTANT IN ACCUMULATOR 16
ENT: TDZA F,F ;DIALOGUE LOAD ALWAYS IF STARTED HERE
JFCL ;SPECIAL LOAD. PRESERVE BITS
CONI PAG,15 ;GET CURRENT STATE OF PAGER
ANDI 15,PGCLKE!PGCLDE ;CLEAR ALL BUT CACHE STRATEGY BITS
CONO APR,AP.RES ;IOB RESET - CLEAR I/O DEVICES
CONO PAG,0(15) ;TURN OFF PAGING
MOVSI 17,(<JRST (16)>) ;RETURN INST
JSP 16,17 ;GET CURRENT PC
SUBI 16,.-ENT ;RETURN HERE
;16 NOW CONTAINS RUNTIME ORIGIN OF BOOT
AND F,[F11.DM!F11.LD]-ENT(16) ;SAVE ONLY DEFINED BITS
MOVEI T1,PAGTRP-ENT(16) ;THE PAGE FAULT HANDLER
MOVEM T1,CODEND-ENT+EPTPFW(16) ;SET UP TEMPORARY EPT/UPT
MOVEI T1,CODEND-ENT(16) ;GET LOCAL ADDRESS
LSH T1,-11 ;MAKE IT A PAGE NUMBER
IOR 15,T1 ;ADD PAGE NUMBER TO THE CACHE BITS
CONO PAG,0(15) ;MAKE EBR POINT TO THAT PAGE
TDO T1,[1B2+1B18]-ENT(16) ;AND SET UBR AND INHIBIT METER UPDATE
DATAO PAG,T1 ;MAKE UBR POINT TO ITS PAGE
; DETERMINE HIGHEST PHYSICAL CORE ADDRESS .LE. 256K
J1: CONO APR,AP.RNX ;RESET NXM FLAG
MOVEI P1,777000 ;START AT PAGE 512
FNDCOR: SKIP 20(P1) ;REFERENCE PAGE
TSTCOR: CONSO APR,AP.NXM ;NXM?
JRST GOTCOR-ENT(16) ;NO, NOW HAVE HIGEST ADDR
J2: CONO APR,AP.RNX ;NXM - RESET
SUBI P1,1000 ;TRY NEXT LOWER PAGE
JUMPN P1,FNDCOR-ENT(16) ;LOOP
HALT .-ENT(16) ;INTERLEAVE PROBABLY BAD
; MOVE DISK SEARCH CODE TO TOP OF CORE WHILE MOVING TOP TO BOOTS OLD PLACE
;***NOTA BENE - P MUST REMAIN PRESERVED UNTIL FNDDEV!!
;ARRIVE HERE WITH P1 CONTAINING HIGHEST CORE ADDR .LE. 256K
GOTCOR:
HRRI P5,1 ;PUT CODE IN T1
HRLI P5,BOTMOV-ENT(16) ;GET BOOT MOVING CODE
BLT P5,T1+MOVEND-BOTMOV ;MOVE MOVING CODE
HRRZI P2,A%VFST-A%CODE+1000(16) ;WHERE WE START MOVING FROM
;P2 POINTS TO SOURCE AREA (SEE DIAGRAMS)
MOVEM P2,P ;SAVE OLD BASE
HRRZI P3,A%VFST-A%VORG(P1) ;WHERE WE ARE MOVING IT TO
;P3 POINTS TO TARGET AREA (SEE DIAGRAMS)
HRRZI P4,1000+A%VORG-A%VFST ;NUMBER OF WORDS TO MOVE (ROUND PAGES)
JRST T1 ;MOVE THE CODE
; CLEAR AND SET UP EXEC PAGE TABLE (EPT)
CORMVD: HRRZI 16,A%CODE-1000-A%VORG(P1) ;COMPUTE NEW BASE
MOVE P5,P1 ;SAVE ADR OF HIGHEST PHYSICAL PAGE
SUBI P1,A%VORG-A%EPT ;MOVE BASE TO START OF EPT
MOVEI T1,1(P1) ;BUILD BLT POINTER
HRL T1,P1 ; ...
SETZM 0(P1) ;CLR FIRST WORD
BLT T1,777(P1) ;TO END OF EPT
MOVSI T1,(<JFCL>) ;NO-OP ARITH TRAP INST
MOVEM T1,421(P1) ;STORE IN EPT
;THE NEXT PAGE FAULT HANDLER
MOVEI T1,PFERR ;THE NEXT PAGE FAULT HANDLER
MOVEM T1,EPTPFW(P1) ;TO THE EPT
MOVE P2,P1 ;COPY EPT BASE ADR
LSH P2,-9 ;GET PHYS PAGE #
; SET UP EXEC SECTION TABLE AND 1-WORD SPT IN EXEC PAGE TABLE
MOVEI T1,A%PTB-A%EPT(P1) ;GET PHYSICAL ADDRESS OF PAGE TABLE
LSH T1,-↑D9 ;CONVERT TO PAGE #
MOVEM T1,EPTSPT(P1) ;SAVE 1-WORD SPT
MOVX T1,1B1!1B4 ;CODE=2, WRITE, SPT INDEX=0
MOVEM T1,EPTEST(P1) ;SAVE SECTION PTR TO PAGE TABLE
; MOVE BASE POINTER TO PAGE TABLE PAGE
ADDI P1,A%PTB-A%EPT ;CHANGE BASE TO PHYS ADDRESS OF A%PTB
; FORM AOBJN POINTER FOR LOOPING THROUGH PAGE TABLE
MOVEI T2,A%DIR-A%PTB(P1) ;PHYSICAL ADDRESS IN RH OF T2
LSH T2,-9 ;CONVERT TO # OF DIRECTORY PAGE A%DIR
HRLI T2,-< <VORG-A%DIR←-9>+1 > ;NUMBER OF PAGES TO MAP
; MAP PAGES USED BY VBOOT
MOVEI T1,A%DIR←-9(P1) ;START MAPPING AT DIRECTORY AREA
REPEAT 0,<
;EDDT NEEDS TO BE MAPPED WHEN BOOT GOES MAPPED.
;EDDT DOES NOT NORMALLY GET MAPPED INTO BOOT SPACE. IF YOU WANT TO DEBUG WITH
;EDDT AFTER BOOT GETS TO FNDDEV YOU NEED TO ADD THE FOLLOWING INSTRUCTIONS.
;THEY WILL CAUSE ALL OF THE FIRST 512 PHYSICAL PAGES TO APPEAR IN PAGE MAP
;**NOTA BENE - THE PATCH IS FOR SYSTEMS WITH 512K OR MORE ONLY.
HRLZI T2,-1000 ;DO THE WHOLE MAP PAGE
MOVE T1,P1 ;START AT LOCATION ZERO
>;repeat 0
;HERE WE PUT THE N PAGES OF THE TARGET AREA (SEE DIAGRAMS)
;IN THE PAGE MAP
SETPTB: HRRZ T3,T2 ;GET PHYSICAL ADR OF PAGE
TXO T3,IMMPTR ;FORM AN IMMEDIATE POINTER
MOVEM T3,(T1) ;STORE PAGE TABLE ENTRY
ADDI T1,1 ;POINT TO NEXT PAGE TABLE ENTRY
AOBJN T2,SETPTB-ENT(16) ;GO MAP REMAINING PAGES
; SET UP CST ENTRIES FOR ALL PHYSICAL CORE NOW
ADDI P1,A%CST-A%PTB ;CHANGE BASE POINTER TO CST PAGE
MOVE T1,P1 ;SET ALL SLOTS
HRLI T1,-<NCSTPG*1000> ;ONE PAGE WORTH
MOVX T3,1B5 ;GET A NON-ZERO CST CODE FIELD
SETCST: MOVEM T3,(T1) ;STORE A CST ENTRY
AOBJN T1,SETCST-ENT(16) ;LOOP TILL ALL CST ENTRIES SET UP
TLO P2,(1B2) ;LOAD UBR
MOVE P3,P2 ;SAVE PAGER WORD TO STORE LATER
HRLI P2,500600 ;SELECT BLOCK 6 AS PREVIOUS AC BLOCK
; AND LOAD THE UBR
J3: DATAO PAG,P2 ; ...
HRRZI T1,A%EPT-A%CST+EPTSPT(P1) ;GET PHYS ADR OF SPT
XCTU [MOVEM T1,SPTADR]-ENT(16) ;STORE SPT BASE ADDRESS IN PAGER AC 3
XCTU [MOVEM P1,CSTADR]-ENT(16) ;STORE CST BASE ADDRESS IN PAGER AC 2
MOVX T1,77B5 ;GET ONES FOR CST MASK FIELD
XCTU [MOVEM T1,CSTMSK]-ENT(16) ;STORE CST MASK VALUE IN PAGER AC 0
TRO P2,1B22!1B21 ;TRAP EN AND KL PAGING
CONI PAG,T1 ;GET PAGER BITS AGAIN
ANDI T1,PGCLKE!PGCLDE ;ENABLE TOPS20 PAGING
IOR P2,T1 ;ADD IN CACHE BITS
DMOVE T1,[ CONO PAG,(P2) ;LOAD EBR
JRST FNDDEV ]-ENT(16) ;GO SET UP LOW CORE MAP
TOP2: JRST T1 ;AND TURN THE PAGING ON
LIT
IFGE .-ENT-141,<PRINTX NO ROOM FOR INITIAL UPT>
BLOCK 1000-<.-ENT> ;RESERVE REST OF PAGE FOR THE EPT/UPT
BLOCK A.DATA-A%DATA ;MAKE ROOM FOR ALLOCATED VARIABLES
CODE: PHASE A.DATA
FNDDEV: MOVEM F,LODTYP ;SAVE STARTING FLAGS FROM KLINIT
TXNE F,F11.DM ;DUMPING?
SETOM NOLDDX ;YES, DON'T LOAD DX20 MICROCODE
TXNE F,F11.LD ;AUTO-RELOADING?
SETZM NOLDDX ;YES, RELOAD DX20 EVEN IF DUMPING
MOVEM P,LODBAS ;SAVE START ADDRESS OF SOURCE AREA (SEE DIAGRAMS)
MOVEI P,<1000+A%VORG-A%VFST>-1(P) ;SAVE END OF SOURCE AREA
MOVEM P,LODTOP ;LAST ADDRESS MOVED
HRRZI P,A%VFST-A%VORG(P5) ;TOP ADDRESS ROUNDED TO PAGES
MOVEM P,TOPBAS ;SAVE START ADDRESS OF TARGET AREA (SEE DIAGRAM)
MOVEI P5,777(P5) ;SET UP TOP OF SAVED FOR THE SAVE
MOVEM P5,TOPTOP ;SAVE END OF TARGET AREA
; CODE TO MAP LOW CORE USING KL STYLE PAGING
MOVEI P1,A%PTB ;GET ADDRESS OF PAGE TABLE PAGE
SETZB P2,P3 ;P2=VIRTUAL, P3=PHYSICAL PAGE #
SETEPT: CONO APR,AP.RNX ;RESET NXM FLAG
MOVE T1,P3 ;GET PHYSICAL PAGE NUMBER
TXO T1,1B2!1B4 ;CODE = 1, WRITE
MOVEM T1,(P1) ;PUT ENTRY INTO PAGE TABLE
MOVE T1,P2 ;GET VIRTUAL PAGE #
LSH T1,↑D9 ;CONVERT PAGE # TO ADDRESS
J4: CLRPT 0(T1) ;CLEAR THE ENTRY FIRST
SKIP 20(T1) ;TRY TO REFERENCE VIRTUAL PAGE
TSTMEM: CONSZ APR,AP.NXM ;NXM OCCUR ?
JRST SETEP1 ;YES, TRY NEXT PHYSICAL PAGE
ADDI P1,1 ;NO, NEXT PAGE TABLE SLOT
ADDI P2,1 ;NEXT VIRTUAL PAGE #
CAILE P2,VFREE ;MAP JUST UP TO OURSELF
JRST SETEP2 ;IF DONE, GO SET UP DTE20
SETEP1: ADDI P3,1 ;NEXT PHYSICAL PAGE #
CAMG P3,[PHYPAG] ;DONE ALL OF CORE?
JRST SETEPT ;NO, GO DO NEXT PAGE
SETEP2:
; DEFEND AGAINST MEMORY PARITY ERRORS IN 20-23
SETZM 20 ;WIPE OUT PARITY ERRORS
MOVE T1,[20,,21] ;ZERO WHOLE AREA
BLT T1,23 ;DO IT
SETZM DTEFLG ;CLEAR DONE FLAG
SETZM DTEMTI ;INITIALIZE INPUT READY FLAG
MOVSI T1,-DTEN ;SCAN ALL AVAILABLE DTE'S
MOVE T2,[CONSO DTE,DTEPRV] ;LOOK FOR MASTER
MOVE T3,[CONSO DTE,PI0ENB+7] ;LOOK FOR ANY PI ASSIGNMENT
MOVE Q1,[CONO DTE,0] ;PROTOTYPE CONO
SETEP3: XCT T3 ;A PI ASSIGNMENT UP?
JRST [ HRRI Q1,PIENB+PI0ENB ;NO. TRY TO SET IT
XCT Q1
XCT T3 ;NOW SET?
JRST SETEP5 ;NO. NON-EXISTANT DEVICE THEN
TRZ Q1,PI0ENB ;YES. TURN IT OFF
XCT Q1 ;DO IT
JRST .+1] ;AND PROCEED
XCT T2 ;THIS IT
JRST [ MOVEI T1,0(T1) ;YES. GET DTE NUMBER
LSH T1,↑D26 ;POSITION FOR CONO
ADD T1,[CONO DTE,0(Q1)] ;PROTOTYPE WORD
MOVEM T1,DTCNOW ;SAVE IT
JRST SETEP4] ;DONE
SETEP5: ADD T2,[4B11] ;NEXT DTE
ADD T3,[4B11]
ADD Q1,[4B11] ;ADJUST ALL I/O INSTRUCTIONS
AOBJN T1,SETEP3 ;NOPE. LOOK AT NEXT
HALT . ;NOT THERE. CAN'T HAPPEN
SETEP4: MOVEI Q1,.DTMMN ;MONITOR MODE ON
MOVEM Q1,DTECMD ; STORE IN COMMAND
J5: MOVEI Q1,TO11DB ;RING THE BELL
XCT DTCNOW ;DO IT
J6: SKIPN DTEFLG ;WAIT FOR COMPLETION
J7: JRST .-1 ; ...
MOVEM P5,MAXCOR ;SAVE MAX CORE AVAILABLE
SETOM CURPAG ;INITIALIZE CURRENTLY IN-CORE DIR PAGE
;DISPLAY PROGRAM VERSION
CALL CRLF ;...
MOVEI Q2,[ASCIZ/BOOT V/]
CALL OUTSTR ;...
CALL TYPBVR ;OUTPUT BOOT VERSION
GETCM1: SETZM DSKTAB ;MAKE SURE THIS IS ZERO
SETZM MONLOD ;INDICATE FIRST INVOCATION OF VBOOT
NOWAITS<
IFE FT.MTA,<MOVSI T1,'PS '> ;DISK DEFAULT DEVICE
>;NOWAITS
IFWAITS<
IFE FT.MTA,<MOVSI T1,'RSK'> ;DISK DEFAULT DEVICE
>;IFWAITS
MOVEM T1,STRNAM ;STORE THE DEFAULT NAME
BLKI APR,T1 ;GET CPU SERIAL NUMBER
ANDI T1,7777 ;IF KL
MOVEM T1,APRSER ;STORE SERIAL NUMBER
GETCOM: SETZM CX ;INDICATES WE ARE ENTERING VBOOT FROM BOOT
MOVE P,PDP ;SETUP PDL
MOVE T1,[Z.STRT,,Z.STRT+1] ;CLEAR DATA AREA
SETZM Z.STRT
BLT T1,Z.END
SETOM MAXUNI ;THIS MEANS WE HAVE NOT FOUND DEVICE, YET
SKIPE LODTYP ;DIALOGUE LOAD?
JRST GETCO1 ;YES, DON'T PROMPT, DON'T TAKE OPR COMMAND
CALL CRLF ;DO RETURN
IFE FT.MTA, <
MOVEI Q2,[BYTE (7)"B","O","O","T",76,0]
>
IFN FT.MTA, <
MOVEI Q2,[BYTE (7)"M","T","B","O","O","T",76,0]
>
CALL OUTSTR ;OUTPUT PROMPT
GETCO1: CALL GETSTR ;GET COMMAND FROM OPERATOR
MOVEM T1,FNDCMD ;SAVE COMMAND POINTER
SETZ P2, ;WHERE TO FORM STRUCTURE NAME
SKIPN T1,DEV ;DEVICE TYPED?
JRST [ SKIPE DSKTAB ;NO. ALREADY HAVE A DEVICE?
JRST FOUND ;YES. USE IT THEN
JRST DVX1] ;NO. GO FIND THWE DEFAULT
MOVE T2,[POINT 6,P2] ;PTR TO NAME
MOVEI T3,6 ;MAX # CHARS
DEVNAM: ILDB T4,T1 ;GET CHAR
CAIN T4,":" ;END OF NAME?
JRST DEVX ;YES - PUNT
SUBI T4,40 ;CONVERT TO SIXBIT
IDPB T4,T2 ;STORE CHR
SOJG T3,DEVNAM ;LOOP
DEVX: CAMN P2,STRNAM ;SAME STRUCTURE AS LAST TIME?
SKIPN DSKTAB ;YES, FOUND DEVICES YET?
SKIPA ;NO. MUST LOOK THEN
JRST FOUND ;YES, GO DO COMMAND
MOVEM P2,STRNAM
DVX1: MOVE T1,[DSKTAB,,DSKTAB+1] ;SET UP TO CLEAR DSKTAB
SETZM DSKTAB ;CLEAR FIRST WORD OF TABLE
BLT T1,DSKTAB+DSKSIZ-1 ;CLEAR DISK TABLE
SETZM PASS ;INDICATE PASS 1 OF UNIT-SEARCHING CODE
IFN FT.MTA,<SETZM DIRFLG> ;MAKE IT READ DIRECTORY AGAIN
SETZM DSKTYP ;INDICATE UNIT TYPE UNKNOWN
IFN FT.MTA, <
;REMOVE THIS CROCK
;THIS TEST IS INSERTED HERE TO MAKE DEFAULT AND SPECIAL LOADS FROM
; MAG TAPE WORK APPROXIMATELY THE SAME AS FOR DISK, AND TO PROVIDE
; FOR ANY POSSIBLE FUTURE CHANGE TO VBOOT WHEREIN A MAGTAPE DEVICE
; IDENTIFIER OTHER THAN "MT:" WILL BE ACCEPTED, AND ACTED UPON.
; MOVSI T1,'MT ' ;GET MAG TAPE DEVICE NAME
; CAME T1,STRNAM ;CORRECT DEVICE ENTERED ?
; JRST FDSK ;NO, GO ISSUE ERROR MESSAGE
; JRST FTAP ;GO FIND READY TAPE DRIVE
JRST FTAP ;GO FIND READY DRIVE
>;IFN FT.MTA
IFE FT.MTA, <
JRST FDSK ;GO FIND STRUCTURE
>;IFE FT.MTA
;SUBROUTINE TO LOCATE UNIT CONTAINING STRUCTURE TO BOOT FROM
;ON A SPECIAL LOAD, WE CAN PASS THROUGH THIS CODE TWICE:
;1. SEARCH FOR A PACK WHOSE APR SERIAL NUMBER MATCHES OUR CPU.
; IF A MATCH IS FOUND, LOAD FROM THAT PACK.
;2. IF #1 FAILS, SEARCH FOR STRUCTURE PS: AND LOAD FROM THAT PACK.
;
; ON THE FIRST PASS, IF WE NOTICE WE HAVE A DX20, WE LOAD AND START IT.
; EVERY CHANNEL AND UNIT ON THE SYSTEM IS CHECKED.
IFE FT.MTA, <
FDSK: SETZB P1,P2 ;CHANNEL # HELD IN P1, UNIT IN P2
SETZM DIORG ;INITIALIZE DIRECTORY ORIGIN
MAP T1,A%FP0 ;GET PHYS ADDR OF FP0
TLZ T1,777760 ;KEEP JUST THE ADDRESS BITS
TLO T1,(<1B0+1B1+<1000B13>>) ;DATA XFR, LAST CCW, # OF WORDS
MOVEM T1,ICCW ;STORE
FDSK1: MOVE T1,[1B1+ICCW] ;GET JUMP CCW
MOVE T2,P1 ;GET CHANNEL NUMBER
LSH T2,2 ;GET CHANNEL*4
MOVEM T1,A%EPT+ICA(T2) ;STORE INITIAL CCW FOR RH20
SETZM P2 ;START AT UNIT 0
CALL CHKCHN ;THIS CHANNEL EXIST ?
JRST FDSK2 ;YES, GO CHECK ITS UNITS
JRST FDSK4 ;NO, GO TRY NEXT CHANNEL
FDSK2: CALL CHKUNI ;THIS UNIT EXIST ?
JRST GOTDRV ;YES, GO SEE IF AN RP04
FDSK3: AOS P2 ;GET NEXT UNIT NUMBER
CAIG P2,MAXDRV ;CHECKED ALL DRIVES YET ?
JRST FDSK2 ;NO GO CHECK NEXT DRIVE
FDSK4: AOS P1 ;YES, INCREMENT CHANNEL #
CAIG P1,MAXCHN ;CHECKED ALL CHANNELS YET ?
JRST FDSK1 ;NO, GO DO NEXT CHANNEL
SKIPL T1,MAXUNI ;Yes. CHECK FOR FULL DECK
JRST CHKSTR ;HAVE FOUND SOME UNITS
SKIPE DEV ;HAVE WE CHECKED A STRUCTURE NAME?
JRST FDSK6 ;STRUCTURE NOT FOUND - CHECK THE CONTEXT
SETOM DEV ;GO THRU DISKS A SECOND TIME -- FOR STR NAME
SETOM PASS ;INDICATE 2'D PASS
JRST FDSK
CHKSTR: SKIPN DSKTAB(T1) ;ANY ID?
$ERROR (STRNID) ;NO STRUCTURE ID
SOJGE T1,CHKSTR ;YES - LOOP FOR OTHER UNITS
JRST FOUND ;PASS COMMAND TO VBOOT
FDSK6: SKIPE PASS ;PASS 1?
$ERROR(STRNBS) ;NO - NO BOOTABLE STRUCTURE
$ERROR(STRSNF) ;YES - SPECIFIED OR DEFAULT STRUCTURE NOT FOUND
;here a drive exists
GOTDRV: ANDI T2,R4%TYP ;KEEP JUST THE DEVICE TYPE CODE
CAIN T2,.R5TYP ;Is this an RP05?
MOVEI T2,.R4TYP ;Yes. Pretend it's an RP04
SKIPG T1,DSKTYP ;DISK TYPE KNOWN YET?
JRST GOTDV3 ;NO - SEE IF ANY OF ALLOWED TYPES
CAME T2,T1 ;YES - IS THIS UNIT SAME AS DESIRED?
JRST FDSK3 ;no. try another unit
JRST GOTDV0 ;YES - USE IT
;Unit type isn't known yet. Check type against all usable disk types
GOTDV3: CAIE T2,.R7TYP ;RP07?
CAIN T2,.R3TYP ;RM03?
JRST GOTDV4 ;YES - Save type Negated
CAIE T2,.R6TYP ;RP06?
CAIN T2,.R4TYP ;OR RP04? (or RP05?)
JRST GOTDV4 ;YES - SAVE TYPE NEGATED
JRST FDSK3 ;NO - not a usable type, TRY FOR NEXT UNIT
GOTDV4: MOVNM T2,DSKTYP ;SAVE NEGATED TYPE IN CASE HOME BLKS GOOD
;Now, try to read Home Blocks
GOTDV0: MOVE T1,[R4%CSR!LR!R4%CPA!GO] ;PACK ACKNOWLEDGE, SETS VV BIT
CALL RHWT1 ;GO DO THE DATAO
MOVSI T1,(.TMDSR) ;READ DEVICE STATUS REGISTER
CALL RHRD1 ;GET IT
TRNN T1,TMSMOL ;IS IT POWERED UP WITH A PACK ON-LINE?
JRST FDSK3 ;NO. FORGET IT
MOVE T1,[A%FP0,,A%FP0+1] ;SET UP FOR BLT
SETZM A%FP0 ;CLEAR FIRST WORD OF DATA PAGE
BLT T1,A%FP0+777 ;ZERO DATA PAGE PRIOR TO READ
CALL RD0 ;GO READ PAGE 0
CALL CHKHOM ;GO CHECK THE HOME BLOCK
SKIPA ;NO GOOD, TRY BACKUP HOME BLOCK
JRST GOTDV1 ;We have acceptable home block
CALL RD10 ;READ BACKUP HOME BLOCK
MOVE T1,[A%FP0,,HOMNAM] ;MOVE DATA TO WHERE THE CHKHOM
BLT T1,HOMCOD ; ROUTINE WANTS IT TO BE
CALL CHKHOM ;GO CHECK THE BACKUP HOME BLOCK
JRST FDSK3 ;Not good home blocks (wrong structure)
GOTDV1: SKIPG T2,DSKTYP ;IS TYPE KNOWN YET?
MOVNS T2,DSKTYP ;NO - MAKE THIS TYPE THE DESIRED TYPE
MOVEI T1,N.CLP4 ;COMPUTE NUMBER OF CYLINDERS PER UNIT
CAIN T2,.R6TYP ;RP06?
MOVEI T1,N.CLP6 ;Yes.
CAIN T2,.R3TYP ;RM03?
MOVEI T1,N.CLP3 ;YES
CAIN T2,.R7TYP ;RP07?
MOVEI T1,N.CLP7 ;YES
MOVEM T1,NUMCYL ;SAVE RESULT
JRST FDSK3 ;GO CHECK more UNITs
>;IFE FT.MTA
;SUBR TO CHECK IF A CHAN IS PRESENT
;RETURNS: +1 CHANNEL EXISTS
; +2 CHANNEL DOESN'T EXIST
CHKCHN: MOVEI T1,.RHMBR ;RESET
CALL RHCO1 ;DO CONO
MOVEI T1,.RHMBE ;ENABLE
CALL RHCO1
CALL RHCI1 ;DO CONI
TRNN T1,.RHMBE ;BIT COME BACK?
RETSKP ;SKIP RETURN
RET ;RETURN
;SUBROUTINE TO SEE IF A UNIT EXISTS
;RETURNS: +1 UNIT EXISTS
; DEVICE BITS IN T2
; +2 UNIT DOESN'T EXIST
CHKUNI: MOVSI T1,(.TMDTR) ;READ DRIVE TYPE REG
CALL RHRD1 ;...
MOVE T2,T1 ;COPY FOR RETURN
CALL RHCI1 ;SEE IF REG ACC ERR
TRNN T1,.RHRAE ; ...
RET ;ALL IS WELL
MOVEI T1,.RHRAE!.RHMBE ;CLEAR RAE, ENABLE
CALL RHCO1 ;DO CONO
JRST RSKP ;LOSE
RHRD1: TLZ T1,(LR) ;CLEAR LR BIT
RHWT1: TSO T1,P2 ;INSERT UNIT NUMBER
CALL XIO1 ;SET IOA
DATAO .-.,T1 ;SEND TO DEVICE
CALL XIO1 ;SET IOA
DATAI .-.,T1 ;READ REG
RET
RHCI1: CALL XIO1 ;SET IOA
CONI .-.,T1 ;DO CONI
RET
RHCO1: CALL XIO1 ; SET IOA
CONO .-.,(T1) ;DO CONO
RET
XIO1: MOVEI F,RH0←-2(P1) ;PRODUCE DEVICE CODE
IOXCT: DPB F,[POINT 7,@(P),9] ;PLUG IOADDR
RET ;EXECUTE INSTR
IFN FT.MTA,<
FTAP: SETZB P1,P2 ;START AT CHAN 0, ADDR 0
GETTCH: CALL CHKCHN ;DOES THIS CHANNEL EXIST?
JRST GOTTCH ;YES - TRY UNITS
NXTTCH: AOS P1 ;NO - NEXT CHANNEL
CAIG P1,MAXCHN ;OUT OF CHANNELS
JRST GETTCH ;NO - TRY THIS ONE
$ERROR (TAPNDR) ;NO READY DRIVE AVAILABLE
GOTTCH: CALL CHKUNI ;GET DEV TYPE IN T2, IF EXTANT
JRST GOTTUN ;EXISTS - GO CHECK TYPE
NXTTUN: AOS P2 ;NEXT CONTROLLER
CAIG P2,7 ;ANY MORE
JRST GOTTCH ;YES - SEE IF THIS WINS
SETZ P2, ;NO - TRY NEXT CHANNEL
JRST NXTTCH ; ...
GOTTUN: ANDI T2,777 ;ISOLATE CONTROLLER TYPE
SETZ P3, ;START AT UNIT 0
CAIN T2,.T8TYP ;IS IT A TM78?
JRST GOTTM8 ;YES. SEE IF THIS IS THE UNIT
MOVEI P6,TM.IDX ;TRY TM02/TM03
CAIL T2,10 ;SEE IF TM02
CAIL T2,17 ; ...
SKIPA ;NOT A TM02
JRST NXTTDR ;ITS A TM02
CAIL T2,50 ;SEE IF A TM03
CAIL T2,57 ; ...
JRST NXTTUN ;NOT A TM03
NXTTDR: MOVSI T1,(.TMTCR!LR) ;PREPARE TO SELECT UNIT
IOR T1,P3 ;INSERT UNIT NUMBER
CALL RHWT1 ;INSERT KON, SEND TO CHN
MOVSI T1,(.TMDSR) ;READ DEVICE STATUS
CALL RHRD1 ; ...
TRNE T1,TMSMOL ;DEVICE READY?
JRST GOTTDR ;YES!!
AOS P3 ;NO - TRY NEXT DRIVE
CAIG P3,7 ;ANY MORE?
JRST NXTTDR ;YES
SETZ P3, ;NO - TRY NEXT KON
JRST NXTTUN ; ...
GOTTM8: MOVEI P6,T8.IDX ;SET FOR TM78
MOVEI T1,T7.SNS←6 ;DO A SENSE ON THIS SLAVE
CALL T78.ND
JUMPE T2,GOTM8A ;TIMED OUT IF 0 - TRY NEXT SLAVE
MOVSI T1,(.T7SR) ;SLAVE IS THERE, SEE IF DRIVE IS OK
CALL RHRD1
TRNN T1,T7.RDY ;IS DRIVE READY?
JRST GOTM8A ;NOPE. TRY NEXT
MOVEI T1,T7.REW←6 ;YES. REWIND IT
CALL T78.ND
JUMPE T2,GOTM8A ;LOSE IF WE TIMED OUT
T78.CK: MOVEI T1,T7.SNS←6 ;DO A SENSE
CALL T78.ND
;THIS IS AN INCREDIBLE *****CROCK****** (CATCH 78) BUT:
; THE ONLY WAY YOU CAN TELL IF A DRIVE IS REWINDING IS TO DO A SENSE
; BUT YOU CAN'T DO A SENSE IF THE DRIVE IS REWINDING - THE CONTROL JUST STACKS IT
; SO IF THE SENSE WE JUST DID TIMES OUT THE DRIVE IS REWINDING!
JUMPE T2,T78.CK ;KEEP ON CHECKING IF WE TIMED OUT
JRST GOTTD1 ;ALL IS COOL. USE THIS SLAVE
GOTM8A: CAIGE P3,3 ;DONE WITH THIS UNIT (TM78)
AOJA P3,GOTTM8 ;NO, TRY NEXT SLAVE ON THIS TM78
SETZ P3, ;YES, RESET SLAVE (UNIT) NUMBER
JRST NXTTUN ;TRY NEXT TM78 ON THIS RH20
;ROUTINE TO DO A NON-DATA FUNCTION ON A TM78/TU78
;ENTER WITH T1=FUNCTION←6, P3=UNIT
T78.ND: PUSH P,T1 ;SAVE FUNCTION
MOVEI T2,200000 ;HOW LONG TO WAIT FOR TM78 TO BECOME READY
T78.N1: MOVSI T1,(.T7TMS) ;READ THE TM78 STATUS REGISTER
CALL RHRD1
TRNN T1,T7.RDY ;IS IT WITH US?
SOJG T2,T78.N1 ;NO, TRY AGAIN
POP P,T1 ;RESTORE REAL FUNCTION
JUMPE T2,R ;RETURN IF WE TIMED OUT
ADDI T1,<(.T7ND0)>←-14(P3) ;POINT AT RIGHT REGISTER FOR THIS DRIVE
ROT T1,-6 ;BITS 0-5=REG, 33-35=FUNCTION
TLO T1,(LR) ;WRITE THE REGISTER
CALL RHWT1 ;DO IT TO IT
MOVEI T2,200000 ;LOOP COUNT
T78.N2: MOVSI T1,(.TMATR) ;WAIT FOR ATTENTION BIT TO COME UP
CALL RHRD1 ;WAIT FOR ATTENTION BIT TO COME UP
TRNN T1,377 ;ATTEN?
SOJG T2,T78.N2 ;NO, TRY AGAIN
JUMPE T2,R ;GO AWAY IF WE TIMED OUT
MOVE T2,T1 ;SAVE FUNCTION
MOVE T1,[.TMATR!LR!377] ;CLEAR THE ATTENTION BIT
CALL RHWT1
EXCH T1,T2 ;RESTORE DATA, SET T2 POSITIVE
RET ;AND GO AWAY
GOTTDR: MOVE T1,[EXP .TMCSR!LR+.TMRWF]
CALL RHWT1 ;DO REWIND
MOVSI T2,10000 ;WAIT COUNT
CALL WTRDY1 ;WAIT FOR READY
GOTTD1: SETOM DIORG ;FLAG MAGTAPE
MOVEM P6,TAPTYP ;SAVE TYPE TYPE FOR LATER
SETZM MAXUNI ;HIGHEST NUMBERED UNIT
MOVE T2,P1 ;GET CHAN
LSH T2,6 ;SHIFT
IOR T2,P2 ;WITH KONTROLLER
LSH T2,6 ;AGAIN
IOR T2,P3 ;AND SUBUNIT
TLO T2,(1B0) ;SET NEGATIVE
MOVEM T2,DSKTAB ;STORE
JRST FOUND ;WIN.
WTRDY: MOVSI T2,5 ;TIMEOUT COUNTER
WTRDY1: MOVSI T1,(.TMDSR) ;WAIT FOR DRIVE READY
CALL RHRD1 ; ...
TRNE T1,TMSPIP ; ...
SOJG T2,WTRDY1 ;TIMED LOOP
PUSH P,T1 ;SAVE STATUS REG
MOVE T1,[EXP .TMATR!LR+377] ;RESET ALL ATTENTION FLAGS
CALL RHWT1 ; ...
POP P,T1 ;RESTORE STATUS REG
SKIPN T2
$ERROR (TAPHTE) ;HARD TAPE ERROR
RET ;WIN
>;IFN FT.MTA
;PAGE FAULT HANDLER
PFERR: AOS A%EPT+UPTPFO ;THE PC OF THE FAULT
JRST @<A%EPT+UPTPFO> ;PROCEED
; SUBROUTINE TO CHECK STRUCTURE NAME OF PACK ON CURRENT CHANNEL AND UNIT
; RETURNS +1 NO MATCH
; +2 MATCH
; OR ERROR RETURN TO COMMAND PARSER
CHKHOM: MOVE T1,HOMNAM ;CHECK BLOCK NAME
CAME T1,[SIXBIT 'HOM']
RET ;BAD
MOVE T1,HOMCOD ;CHECK BLOCK CODE
CAIE T1,CODHOM ;...
RET ;BAD
SKIPE DEV ;WAS DEVICE STRING TYPED AT CONSOLE
JRST [MOVE T1,HOMSNM ;YES, FORGET LOOKING FOR SERIAL NUMBERS
CAME T1,STRNAM ;CHECK STRUCTURE NAME
RET ;NO MATCH
JRST CHKHM1] ;MATCH, RECORD THIS
MOVE T1,HOMSER ;GET APR SERIAL NUMBER
CAME T1,APRSER ;IS IT A MATCH?
RET ;NO
MOVE T1,HOMSNM ;GET STRUCTURE NAME
SKIPN CURNAM ;IS THIS THE FIRST TIME THRU?
MOVEM T1,CURNAM ;YES, STORE NAME
CAME T1,CURNAM ;ARE THE NAMES THE SAME
RET ;NO
CHKHM1: MOVE T1,HOMLUN ;GET LOGICAL UNIT
SKIPE DSKTAB(T1) ;IS THERE ALREADY AN ENTRY?
$ERROR(STRMTO) ;YES - MORE THAN 1 BOOTABLE STRUCTURE
HRRZM P2,DSKTAB(T1) ;STORE UNIT NUMBER
MOVEI T2,ENTFLG(P1) ;GET CHANNEL & ENTRY-IN-USE FLAG
HRLM T2,DSKTAB(T1) ;STORE CHANNEL NUMBER
HLRZ T1,T1 ;GET # UNI IN STR
SOS T1
SKIPGE MAXUNI ;ALREADY SET?
MOVEM T1,MAXUNI ;NO - SET
CAME T1,MAXUNI ;SAME AS OTHERS?
$ERROR (STRHOM) ;BAD HOME BLOCK
MOVE T2,HOMRXB ;GET ROOT XB
SKIPN DIORG ;ALREADY SET?
MOVEM T2,DIORG ;YES - LET IT BE
CAME T2,DIORG ;SAME AS OTHER
$ERROR (STRHOM) ;BAD HOME BLOCK
RSKP:
CPOPJ1: AOS (P) ;SKIP RETURN
R:
CPOPJ: RET
;STRING READ FROM CONSOLE
GETSTR: MOVE Q3,[POINT 7,D$ISTR] ;OUTPUT POINTER
MOVE T1,Q3 ;SAVE - THIS IS OUR VALUE
SKIPE T2,LODTYP ;Skip if DIALOGUE LOAD
JRST GETST1 ;NO. GO PROCESS BITS
GET.W: CALL TYI ;READ A CHARACTER
CAIN Q1,"U"-100 ;CONTROL-U?
JRST [ MOVEI Q2,[ASCIZ/XXX/] ;YES - OUTPUT LINE DELETE PROMPT
CALL OUTSTR
JRST GETCOM] ;AND GET ANOTHER LINE
CAIN Q1,177 ;RUBOUT?
JRST [ PUSH P,T1 ;YES = START THE DELETE
LDB Q1,Q3 ;GET THE LAST CHARATER
HRROI T1,-1 ;BACKUP THE BYTE POINTER
CAME Q3,[10700,,D$ISTR-1] ;HAVE WE?
CAMN Q3,[POINT 7,D$ISTR] ;HAVE WE?
JRST [ MOVEI Q1,7 ;YES - RING THE BELL
CALL TYO ;OUTPUT THE BELL
POP P,T1
JRST GET.W] ;GET NEXT CHARACTER
ADJBP T1,Q3
CALL TYO ;OUTPUT THE CHARACTER LAST TYPED
MOVEI Q1,"\" ;AND THE BACK-SLASH
CALL TYO ;TYPE IT
MOVEM T1,Q3 ;RESET BYTE POINTER
POP P,T1
JRST GET.W] ;GET NEXT CHARACTER
CAIL Q1,140 ;LOWER CASE?
SUBI Q1,40 ;YES, MAKE UPPER
CAIN Q1,15 ;EOL?
JRST GET.EL ;YES - FINISH OUT
IDPB Q1,Q3 ;STORE CHARACTER
CAIE Q1,":" ;DEV NAME TERM?
JRST GET.W ;NO - LOOP
MOVEM T1,DEV ;YES - SET FLAG
MOVE T1,Q3 ;NEW COMMAND PTR
JRST GET.W ;LOOP FOR MORE
GET.EL: IDPB Q1,Q3 ;STORE CR
CALL CRLF ;ECHO CRLF
GET.E1: SETZI T2, ;TERMINATING NULL
IDPB T2,Q3 ; STORE
RET ;RETURN
CRLF: MOVEI Q1,15 ;CR WITH PARITY
CALL TYO ;TYPE OUT
MOVEI Q1,12 ;LF
CALLRET TYO
;KLINIT HAS REQUESTED SPECIAL LOAD. PROCESS THE BITS
GETST1: TXZE T2,F11.DM ;WANT DUMP?
JRST [ MOVE T3,[BYTE (7) "/","D",.CHCRT,0]
JRST GETST3]
TXZE T2,F11.LD ;WANT STANDARD LOAD?
JRST [ MOVE T3,[BYTE (7) .CHCRT,0]
JRST GETST3]
GETST3: MOVEM T3,D$ISTR ;STASH THE STRING
MOVEM T2,LODTYP ;STASH REMAINING FLAGS
RET ;AND DONE
IFN FT.UDB,<
;USER MODE CONSOLE DRIVERS
TYO: PUSH P,T1 ;PRESERVE T1
MOVE T1,Q1 ;COPY CHAR
PBOUT ;OUTPUT IT
POP P,T1 ;RESTORE T1
RET
TYI: PUSH P,T1 ;SAVE T1
PBIN ;READ A CHAR
CAIN T1,37 ;EOL?
MOVEI T1,15 ;YES - TURN TO CR
MOVE Q1,T1 ;RETURN IN STANDARD AC
POP P,T1 ;RESTORE T1
RET
>;END IFN FT.UDB
.DTTYO==10B27 ;FUNCTION CODE FOR TYPE OUT, CHAR IN LOW BITS
.DTMMN==11B27 ;FUNCTION CODE FOR MONITOR MODE ON
;EPT LOCS
DTEFLG=A%EPT+444 ;OPERATION COMPLETE FLAG
DTEF11=A%EPT+450 ;PDP11 TO PDP10 ARGUMENT
DTECMD=A%EPT+451 ;-10 TO -11 COMMAND WORD
DTEOPR=A%EPT+453 ;OPERATION IN PROGRESS FLAG
DTEMTD==A%EPT+455 ;MONITOR OUTPUT DONE WHEN NONZERO
DTEMTI==A%EPT+456 ;0 IF READY FOR ANOTHER CHAR FROM 11
DTEN==4 ;NUMBER OF DTE'S
;DTE20 HARDWARE
DTE==200 ;DEVICE CODE
DTEPRV==1B20 ;PRIVILEGED/RESTRICTED BIT IN CONI
PI0ENB==1B32 ;ENABLE PI 0
PIENB==1B31 ;SET PI ASSIGNMENT
TO11DB==1B22 ;TO 11 DOORBELL
IFE FT.UDB,<
;KL10 CONSOLE ROUTINES
;TELETYPE INPUT
TYI: SKIPN DTEMTI ;INPUT READY
JRST TYI ;NO - LOOP
MOVE Q1,DTEF11 ;GET CHAR
CALL TYO ;ECHO IT
MOVE Q1,DTEF11 ;GET CHAR AGAIN
SETZM DTEMTI ;RESET INPUT DONE FLAG
RET
;TELETYPE OUTPUT
TYO: SETZM DTEMTD ;CLEAR OUTPUT DONE FLAG
TRO Q1,.DTTYO ;LIGHT FUNCTION BI
MOVEM Q1,DTECMD ;STORE FOR 11
MOVEI Q1,TO11DB ;RING DOORBELL
XCT DTCNOW ;DO IT
SKIPN DTEMTD ;DONE YET?
JRST .-1 ;NO
RET ;YES
>;IFE FT.UDB
IFE FT.MTA, <
; ROUTINE TO READ PAGE CONTAINING BACKUP HOME BLOCK
;
; ACCEPTS IN P1/ CHANNEL NUMBER
; P2/ UNIT NUMBER
; CALL RD10
; RETURNS +1 IF NO ERRORS, ELSE CAUSES DSKHDE ERROR RETURN
;
;
;
; ROUTINE TO READ PAGE 0
;
; ACCEPTS IN P1/ CHANNEL NUMBER
; P2/ UNIT NUMBER
; CALL RD0
; RETURNS +1 IF NO ERRORS, ELSE CAUSES DSKHDE ERROR RETURN
RD10: SKIPA P4,[.RHSBR!LR!0B27!↑D10B35] ;DESIRED SECTOR AND TRACK
RD0: MOVE P4,[.RHSBR!LR!0B27!0B35] ;RH20 XFR CONTROL REGISTER
MOVEI T3,NRETRY ;MAX TIMES TO RETRY THIS OPERATION
RD00: MOVE T1,[R4%CSR!LR!R4%CRC!GO] ;RECALIBRATE FUNCTION
CALL RHWT1 ;GO RECALIBRATE DRIVE
RD0A: MOVX T1,R4%DSR ;RP04 DEVICE STATUS REGISTER
CALL RHRD1 ;GET DRIVE STATUS
TXNN T1,R4%DRY ;RECALIBRATE FINISHED ?
JRST RD0A ;NO, GO WAIT TILL DONE
MOVE T1,[R4%CSR!LR!R4%RIP!GO] ;READ-IN PRESET FUNCTION
CALL RHWT1 ;INITIALIZE DRIVE
READX: SETZM ICCW+1 ;CHANNEL HALT COMMAND
MOVE T4,[.RHSTR!LR!RCLP!STLW!R4%CRD!GO] ;RH20 XFR CONTROL REGISTER
MOVNI T1,N.BKPG*1 ;ONE PAGE
DPB T1,[POINT 10,T4,29] ;ADD -BLOCK COUNT
; ROUTINE TO DO A DATAO TO THE RP04
; ACCEPTS IN T4/ DATAO DATA
; P1/ CHANNEL NUMBER
; P2/ UNIT NUMBER
; P4/ POSITION SELECT WORD
; RETURNS + 1 IF NO ERRORS, ELSE CAUSES DSKHDE ERROR RETURN
DOOP0: MOVE T1,P4 ;GET POSITION SELECT WORD
CALL RHWT1 ;WRITE IT
MOVE T1,T4 ;GET TRANSFER WORD
MOVEI T2,TIMOUT ;GET TIMEOUT COUNT
CALL RHWT1 ;GO DO THE DATAO
DOOP1: CALL RHCI1 ;GO GET CONI BITS
TXNN T1,.RHDON ;OPERATION COMPLETE ?
SOJG T2,DOOP1 ;NO, LOOP TILL DONE
MOVEI T1,.RHRAE!.RHCTE!.RHMBE!.RHDON
CALL RHCO1 ;CLEAR OUT CHANNEL GRACEFULLY
JUMPLE T2,DOOP2 ;OPERATION EVER FINISH ?
MOVX T1,R4%DSR ;YES, SET UP TO GET DEVICE STATUS
CALL RHRD1 ;GO GET DEVICE STATUS
TXNE T1,R4%ERR ;CHECK COMPOSITE ERROR INDICATOR
JRST DOOP2 ;THE CRUMMY DRIVE SCREWED UP
CALL RHCI1 ;GO GET CONI BITS
TXNN T1,RHERR ;ANY ERRORS ?
RET ;ALL DONE, RETURN
DOOP2: MOVEI T1,.RHMBR+.RHMBE+.RHCTE+.RHSTP ;GET MASSBUS RESET AND ENABLE BITS
CALL RHCO1 ;DO CONO TO CHANNEL
MOVEI T1,.RHMBE ;GET MASSBUS ENABLE
CALL RHCO1 ;ENABLE CHANNEL
MOVE T1,[R4%ATN!LR!377] ;RP04 ATTENTION REGISTER
CALL RHWT1 ;CLEAR ATTENTION
SOJG T3,RD00 ;TRY IT ALL OVER AGAIN
RET ;CATCH ERROR LATER
>;IFE FT.MTA
; PUSH-DOWN POINTER
PDP: IOWD PDLEN,PDL
FOUND: MOVE T1,FNDCMD ;POINTER TO CMD
CALL VBOOT1 ;PERFORM COMMAND
VBTRET: JUMPN CX,MRET2 ;RETURN TO MONITOR?
JRST GETCOM ;NO - GO ASK FOR NEXT COMMAND
;ON ERROR, ARRIVE HERE WITH ERROR TYPE IN Q2
ERRTYP:
IFN STANSW,<
TXZN F,F.DUMP ;DON'T FORCE INTERACTIVE MODE IF DUMPING
>;IFN STANSW
SETZM LODTYP ;FORCE INTERACTIVE MODE ON ERROR
PUSH P,Q2 ;SAVE Q2
CALL CRLF ;OUTPUT CRLF
MOVE Q2,ERRPFX ;GET THE PREFIX
CALL OUTSTR ;OUTPUT IT
MOVE Q2,(P) ;GET ERROR TYPE
MOVE Q2,ERRTAB(Q2) ;GET POINTER TO MESSAGE
CALL OUTSTR ;OUTPUT MESSAGE
IFE FT.MTA,< ;Avoid TRY FOR STRUCTURE/FILENAMES in MTBOOT
MOVE Q2,(P) ;GET ERROR SYMBOL
CAILE Q2,ERRSTR ;TYPE STRUCTURE OR FILENAME?
JRST TCR ;NO
TSTR: MOVEI Q2,[ASCIZ/: /]
CALL OUTSTR ;TYPE COLON
SKIPN Q2,CURNAM ;GET STRUCTURE NAME FROM CURNAM IF NON-ZERO
MOVE Q2,STRNAM ;GET STRUCTURE NAME
CALL TYPSTR ;TYPE IT
POP P,Q2 ;RESTORE ERROR SYMBOL
CAIG Q2,ERRFIL ;TYPE FILE NAME?
CALL TYPFIL ;YES
>;IFE FT.MTA
TCR: CALL CRLF ;OUTPUT CRLF
JUMPN CX,MRET1 ;RETURN TO MONITOR?
JRST GETCM1 ;NO, TRY FOR NEW COMMAND
MRET2: AOS CX ;RETURN +2
MRET1: MOVE CX-1,PFLAGS ;RETURN +1 - RESTORE FLAGS
XJRSTF CX-1
;VBOOT
;ENTER HERE FOR YOUR FAVORITE BOOTSTRAP FUNCTION
;ARGUMENTS:
; T1 - BYTE POINTER TO COMMAND STRING
;
;CALL
; ;FIRST SETUP MAP FOR PAGES VORG-24 TO VORG + PROGRAM DATA
; ;ALSO SETUP DISK PARAMETERS IN DATA AREA
; EXTERNAL: JSP 16,VBOOT
; INTERNAL: PUSHJ P,VBOOT1
;RETURNS: NO ERROR, NO START: POPJ P, - TO VBTRET
; ERROR: JRST ERRTYP
; START: JRST @START
;
; NOTE THAT VBOOT RUNS IN THE SECTION IT WAS CALLED FROM:
;
; CALLER SECTION
; ------ -------
; BOOT 0
; TOPS20 V4 0
; TOPS20 V5 1
; BOOT MAY BE CALLED FROM SECTIONS 0 - 37
; TO BE CALLED FROM A SECTION LARGER THAN 37 REQUIRES
; A CHANGE IN THE MONITOR'S CALL TO BOOT
VBOOT:: XSFM PFLAGS ;SAVE FLAGS
XMOVEI T4,VBTRET ;VBOOT IS ENTRY VECTOR FOR MONITOR ONLY -
PUSH P,T4 ; SET UP FOR POPJ RETURN TO FOUND: CODE
TLZ CX,777740 ;IN CASE WE WERE CALLED FROM SECTION ZERO,
; TURN OFF ALL PC FLAGS (0-12)
AOS MONLOD ;INDICATE ANOTHER INVOCATION OF VBOOT
VBOOT1: JFCL ;VBOOT1 IS INTERNAL ENTRY VECTOR
SETZM INIVEC ;INITIALIZE ORIGINAL REGISTER CONTENTS
SETZB F,PIA ;CLEAR FLAGS AND RH20 PI ASSIGNMENT
MOVE P6,TAPTYP ;PICK UP THE TAPE TYPE
MOVEM T1,ISTRNG ;T1 HAS STRING POINTER
CALL PARSE ;PARSE STRING, SETUP ARG BLOCKS
TLNE F,(F.INFO) ;ANY PASIVE FUNCTIONS?
CALL INFO ;YES
TLNN F,(F.ACT) ;ANY ACTIVE FUNCTIONS?
JRST EXIT ;NO - EXIT
IFE FT.MTA,<
CALL FNDIDX ;GET INDEX BLOCK OF DESIRED FILE
>;IFE FT.MTA
JUMPGE F,LODRUN ;DUMP DESIRED (B0 OF F)
CALL SAVE ;YES - DO DUMP
RET
LODRUN: MOVE T1,MONLOD ;GET VBOOT INVOCATION COUNT
JUMPE T1,PASS0 ;JUMP IF FIRST INVOCATION
MOVEI Q2,[ASCIZ/[BOOT: LOADING SWAPPABLE MONITOR, PASS /]
CALL OUTSTR
MOVE Q2,MONLOD ;GET INVOCATION COUNT
CALL OUTOCT ;OUTPUT IT
MOVEI Q2,[ASCIZ/] /] ;CLOSE THE EXPRESSION
CALL OUTSTR ;...
JRST GETCAL
PASS0: MOVEI Q2,[ASCIZ/[BOOT: LOADING RESIDENT MONITOR] /]
CALL OUTSTR
GETCAL: CALL GET ;HERE IF LOAD OR RUN FUNCTIONS
MOVEI Q2,[ASCIZ/[OK]
/]
CALL OUTSTR
SETZM DTEMTI ;ZERO INPUT READY FLAG
CALL SETLCV ;SETUP LOW CORE VARS
EXIT: SETZM ICCW ;TEMP
CALL CHNRST ;RESTORE CHANNNEL
TXNN F,F.EDDT ;START EDDT?
JRST TSSTRT ;NO
MOVEI T1,ELOC ;GET MONITOR START ADDR FOR EDDT
HRRZM T1,START ;SAVE IT
JRST DOSTRT ;GO DO IT
TSSTRT: TLNE F,(F.STRT) ;SHOULD PROGRAM BE STARTED?
DOSTRT: JRST @START ;YES - GO TO IT
RET ;PRESUMED GOOD RETURN
SETLCV: HRRZI T1,A%VORG ;GET ENDING PAGE ADDRESS
HRLI T1,A%VFST ;GET STARTING PAGE ADDRESS
MOVEM T1,BUTPGS ;SAVE ENDING PAGES IN COMMUNICATION AREA
HRRZI T1,A%PTB ;GET ADDRESS OF EPT PAGE
HRLI T1,A%EPT ;GET ADDRESS OF VBOOT EPT PAGE
MOVEM T1,BUTEPT ;SAVE EPT PAGE ADDRESS FOR MONITOR
MOVE T1,MAXCOR ;GET MAX CORE AVAILABLE
MOVEI T1,A%XB-A%VORG(T1) ;GET PHYSICAL ADDRESS OF FIRST PAGE
HRLI T1,-<<A%VORG-A%XB>←-9+1> ;GET # OF PAGES MONITOR MUST MAP
MOVEM T1,BUTPHY ;SAVE MAPPING INFO FOR MONITOR
MOVEI T1,A%XB ;GET FIRS VIRTUAL ADDRESS TO MAP
MOVEM T1,BUTVIR ;SAVE VIRTUAL ADDRESS FROM MONITOR
MOVE Q3,[POINT 7,BUTCMD] ;STORE FILESPEC
MOVEI Q1,"<" ;DIR
IDPB Q1,Q3 ;STORE CHAR
MOVE Q2,DIRSTR ;DIR STRING
CALL CPYSTR ;COPY STRING
MOVEI Q1,">" ;END OF DIR STRING
IDPB Q1,Q3 ;STORE CHAR
MOVE Q2,FILSTR ;FILENAME STRING
CALL CPYSTR ;COPY STRING
MOVEI Q1,"." ;FOR EXT
IDPB Q1,Q3 ;STORE
MOVE Q2,EXTSTR ;EXTENSION
CALL CPYSTR ;COPY STRING
SKIPN VERNUM ;VERSION SPECIFIED?
JRST APPNUL ;NO - EXIT
MOVEI Q1,"." ;YES- PUT VERSION OUT
IDPB Q1,Q3 ;STORE
MOVE Q2,VERSTR ; ...
CALL CPYSTR
JRST APPNUL
CPYSTR: ILDB Q1,Q2 ;GET A CHAR
JUMPE Q1,CPOPJ ;END OF STRING
IDPB Q1,Q3 ;OUTPUT A CHAR
JRST CPYSTR
;THE COMMAND STRING PARSER
PARSE: MOVE T1,[XWD DEFDAT,DEFBEG] ;SETUP BLT POINTER FOR DEFAULTS
BLT T1,DEFEND ;COPY DEFAULTS
TXZ F,F.EDDT ;RESET EDDT FLAG
MOVE Q2,ISTRNG ;GET POINTER TO INPUT STRING
MOVEI P5,ST.0 ;INITIAL STATE
P.NXT: CALL NXTSTA ;SETUP OUTPUTS THEN EVAL NXT STATE
JUMPE P5,P.TRM ;TERMINAL STATE REACHED
CAIN P5,777 ;ERROR STATE
$ERROR (COMERR) ;COMMAND ERROR
IORI P5,STPORG ;NO - RELOCATE STATE TABLE
JRST P.NXT ;GO GET NEXT STATE
P.TRM: MOVE Q2,VERSTR ;TERMINATION - GET VERSION AS #
CALL DECIN ;CONVERT TO BINARY
MOVEM P3,VERNUM ;SAVE VERSION
TXNE F,F.DUMP ;DUMP WANTED?
TXZ F,F.ALL!F.NCHL ;YES, CLEAR THESE FLAGS
MOVE Q2,LBSTR ;GET POINTER TO LOWER BOUND
TXNE F,F.ALL ;WANT TO USE ALL OF CORE?
TDZA P3,P3 ;YES, GET A 0
CALL OCTIN ;NO, READ LOWER BOUND
MOVEM P3,LWRLIM ;SAVE LOWER BOUND
MOVE Q2,UBSTR ;GET POINTER TO UPPER BOUND
TXNE F,F.ALL ;WANT ALL OF CORE?
SKIPA P3,[VFREE] ;YES, GET HIGHEST PAGE BOOT CAN READ
CALL OCTIN ;NO, READ IT
MOVEM P3,UPRLIM ;SAVE UPPER BOUND
MOVE Q2,SWSTR ;GET SWITCH STRING
ILDB T1,Q2 ;GET NEXT CHARACTER
JUMPE T1,P.NOS ;NO SWITCHES - TEST START ADDR AND RETURN
SETZI T2, ;CLEAR SWITCH INDEX
MOVE T3,SWTAB ;GET POINTER TO SWITCHES
P.NXS: ILDB T4,T3 ;GET A LEGAL SWITCH
SKIPN T4 ;ZERO MEANS SWITCH LIST EXHAUSTED
$ERROR (COMUNS) ;UNKNOWN SWITCH
CAME T1,T4 ;TEST IF THIS IS A MATCH
AOJA T2,P.NXS ;NO MATCH - LOOP
XCT SWXTAB(T2) ;EXECUTE APPROPRIATE INSTRUCTION
SKIPE D$UB ;UPPER BOUND SPECIFIED ?
JRST P.SW2 ;YES, USE SPECIFIED VALUE
MOVE T1,[PHYPAG] ;GET HIGHEST PHYSICAL PAGE WE CAN DUMP
TXNE F,F.DUMP ;DUMP REQUESTED ?
MOVEM T1,UPRLIM ;YES, USE DEFAULT UPPER LIMIT FOR DUMP
P.SW2: TLNN F,(F.WRIT) ;WRITING?
JRST P.SA ;NO - CHECK STARTING ADDR
DMOVE T1,DEF.WT ;LOAD BOTH FILENAME DEFAULTS
CAMN T2,FILSTR ;NAME SPECIFIED?
MOVEM T1,FILSTR ;NO - CHANGE DEFAULT
P.SA: CALL OCTIN ;CONVERT STARTING ADDRESS
CALLRET SETSA ;SET STARTING ADDR AND RETURN
SWTAB: POINT 7,.+1 ;POINTER TO SWITCH LIST
ASCIZ 'MLRDSGAIE'
SWXTAB: TLO F,(F.ACT) ;MERGE
TLO F,(F.CLR!F.ACT) ;LOAD
TLO F,(F.CLR!F.STRT!F.ACT) ;RUN
IFE FT.MTA,<
TLO F,(F.WRIT!F.DUMP!F.ACT) ;DUMP
TLO F,(F.WRIT!F.ACT) ;SAVE
>;IFE FT.MTA
IFN FT.MTA,<
JFCL ;NOOP FOR DUMP
JFCL ;NOOP FOR SAVE
>;IFN FT.MTA
TLO F,(F.STRT) ;GO
TLO F,(F.ALL!F.ACT!F.NCHL) ;ALL
TLO F,(F.INFO) ;DISPLAY PROGRAM INFORMATION
TLO F,(F.CLR!F.ACT!F.EDDT) ;LOAD AND START AT LOCATION ELOC
;THE STATE MACHINE
NXTSTA: MOVSI T4,(<POINT 18,0(P5)>) ;MAKE INPUT BYTE PTR
ILDB P4,T4 ;GET OUTPUT VALUE ADDRESS
ILDB Q3,T4 ;GET OUTPUT DATA ADDRESS
HRLI Q3,(<POINT 7,0>) ; MAKE OUTPUT BYTE PTR
MOVE T2,Q3 ;SAVE FOR LATER (CAREFUL WITH T2)
TLC T4,003300 ;SWITCH TO 9 BIT BYTES
NXT.CH: TLZN F,(F.BACK) ;TEST/CLEAR SCANNER BACKUP
ILDB Q1,Q2 ;GET NEXT CHAR
SKIPN Q1
$ERROR(COMERR) ;COMMAND ERROR
MOVE T3,T4 ;COPY POINTER TO TRANSITION TABLE
NXT.NT: ILDB T1,T3 ;GET NEXT TRANSITION BYTE
ANDI T1,177 ;GET DATA ONLY
JUMPE T1,NXT.EX ;SPECIAL BYTE - PROCESS IT
CAMN Q1,T1 ;TRANSITION CHARACTER?
JRST NXT.EX ;YES - PROCESS
ILDB T1,T3 ;SKIP NEXT STATE
JRST NXT.NT ;AND GET NEXT TRANSITION BYTE
NXT.EX: LDB T1,T3 ;GET FULL TRANSITION BYTE
JUMPE T1,NXT.ST ;END OF TABLE - STORE CHAR
ILDB P5,T3 ;GET NEXT STATE
CAIN P5,ST.6&777 ;ACCUMULATING UPPER AND LOWER BOUNDS?
TXO F,F.NCHL ;YES, DISABLE LIMIT CHANGING LATER
LSH T1,-7 ;GET FLAG BITS IN B34-35
XCT NXXTAB(T1) ;EXECUTE INSTRUCTION CORRESPONDING
TLZN F,(F.OUT) ;HAS STATE PRODUCED OUTPUT?
RET ;NO - EXIT
MOVEM T2,(P4) ;SAVE OUTPUT STRING
APPNUL: SETZ T2, ;APPEND NULL
IDPB T2,Q3 ;...
RET
NXT.ST: IDPB Q1,Q3 ;STORE OUTPUT CHAR
TLO F,(F.OUT) ;INDICATE STATE DID SOMETHING
JRST NXT.CH ;AND PROCESS NEXT CHARACTER
;STATE TABLE FLAG ACTION TABLE
NXXTAB: JFCL ;NO FLAGS
TLO F,(F.BACK) ;(200)SCANNER BACKUP
TLO F,(F.OUT) ;(400)FORCE OUTPUT
;(600)CURRENTLY UNUSED
;THIS BLOCK OF DEFAULT VALUES IS COPIED INTO THE DATA AREA
;STARTING AT DIRSTR ENDING AT DEFEND
DEF.WT: POINT 7,[ASCIZ 'DUMP'] ;DEFAULT FILSTR IF WRITING
DEFDAT:
DEF.FN: POINT 7,[ASCIZ 'MONITR'] ;DEFAULT FILSTR
POINT 7,[ASCIZ 'SYSTEM'] ;DEFAULT DIRSTR
POINT 7,[ASCIZ 'EXE'] ;DEFAULT EXTSTR
ZERO: Z ;DEFAULT VERSTR
Z ;DEFAULT SWSTR
POINT 7,[ASCIZ '340'] ;DEFAULT UBSTR
;DEFAULT LBSTR
;NOTE: A LDB ON A BYTE POINTER WITH 0 S FIELD PRODUCES A ZERO BYTE!
IFN <<.&777000>-<<.+STTSIZ>&777000>>,< ;CHECK TO SEE IF STATE PAGE TABLE CROSSES A PAGE
FILLER=<<<.&777000>+1000>-.>&777
BLOCK FILLER ;FORCE STATE TABLE TO PAGE BOUNDARY
>
;STATE TRANSITION TABLES:
; THESE TABLES PARSE A FILESPEC OF THE FORM
; <DIRECTORY>FILE.EXTENSION;VERSION/SWITCHSTARTADDR(LB,UB)
; FORMAT:
; XWD OUTPUT POINTER LOCATION,DATA AREA FOR CHARACTERS OUTPUT FROM THIS STATE
; A STRING OF 9 BIT BYTES CONSISTING OF A CHARACTER+FLAGS WHICH
; WILL CAUSE A STATE TRANSITION FOLLOWED BY THE LOW 9
; BITS OF THE TRANSITION TABLE FOR THE NEXT STATE.
;FLAGS: 200 = BACKUP SCANNER, 400=FORCE OUTPUT EVEN IF NULL
STPORG=.&777000 ;PAGE OFFSET TO STATE TABLES
;STATE 0 - INITIAL P5, MAKES TRANSITION TO NEXT STATE BASED ON FIRST CHARACTER.
ST.0: XWD 0,0 ;NO OUTPUT, NO DATA AREA
BYTE (9)"<",ST.1,".",ST.3,".",ST.4,"/",ST.5,15,0,200,ST.2
;STATE 1 - ACCUMULATE DIRECTORY STRING.
ST.1: XWD DIRSTR,D$DIR ;POINTER=DIRSTR, DATA=D$DIR
BYTE (9)">",ST.2,15,0,0
;STATE 2 - ACCUMULATE FILE NAME STRING
ST.2: XWD FILSTR,D$FIL ;POINTER=FILSTR,DATA=D$FIL
BYTE (9)".",ST.3,".",ST.4,"/",ST.5,15,0,0
;STATE 3 - ACCUMULATE EXTENSION STRING
ST.3: XWD EXTSTR,D$EXT ;POINTER=EXTSTR,DATA=D$EXT
BYTE (9)"."+400,ST.4,"/"+400,ST.5,15+400,0,0
;STATE 4 - ACCUMULATE VERSION STRING
ST.4: XWD VERSTR,D$VER
BYTE (9)"/",ST.5,15,0,0
;STATE 5 - ACCUMULATE SWITCH STRING
ST.5: XWD SWSTR,D$SW
BYTE (9)15,0,"(",ST.6,0
;STATE 6 - ACCUMULATE LOWER PAGE BOUND STRING
ST.6: XWD LBSTR,D$LB
BYTE (9)")",0,",",ST.7,15,0,0
;STATE 7 ACCUMULATE UPPER BOUND STRING
ST.7: XWD UBSTR,D$UB
BYTE (9)")",0,15,0
IFN <<.-ST.0>-STTSIZ>,<PRINTX ?STATE TABLE SIZE DOES NOT AGREE WITH STTSIZ>
IFN <STPORG-<.&777000>>,<PRINTX ?STATE TABLE MUST FIT ON SINGLE PAGE>
;NUMBER INPUT SUBROUTINES
DECIN: MOVEI T2,↑D10 ;SET RADIX DECIMAL
JRST RADIN ;CONVERT
OCTIN: MOVEI T2,↑D8 ;OCTAL RADIX
RADIN: SETZI P3, ;ZERO RESULT
RAD.NX: ILDB T1,Q2 ;GET NEXT CHARACTER
JUMPE T1,CPOPJ ;END OF STRING - RETURN OK
CAIG T1,57(T2) ;CHECK TO BE SURE
CAIGE T1,"0" ;THAT IT IS LEGAL
$ERROR (COMINV) ;INVALID NUMERIC VALUE
IMUL P3,T2 ;IS OK - CONVERT
ADDI P3,-60(T1) ;ADD TO RESULT
JRST RAD.NX
;STARTING ADDRESS SETUP/TEST SUBROUTINES
SETSA:
HRRZM P3,START ;NO, STORE START ADDR FROM EXE FILE
SKIPN START ;NON ZERO?
TLZ F,(F.STRT) ;NO - CLEAR F.STRT
RET
;TYPEOUT Subroutines
;INFO -- DISPLAY PROGRAM VERSION
INFO: MOVEI Q2,[ASCIZ/
BOOT VERSION: /] ;OUTPUT TEXT
CALL OUTSTR ;...
CALL TYPBVR ;OUTPUT BOOT VERSION
;DISPLAY MICROCODE VERSION
MOVEI Q2,[ASCIZ/ MICROCODE VERSION: /] ;OUTPUT TEXT
CALL OUTSTR ;...
MOVEI Q2,[ASCIZ/DX20A: /] ;OUTPUT STRING
CALL OUTSTR ;...
MOVE T1,DXAMCV ;GET DXA MCODE VERSION
CALL TMCVER ;GO DISPLAY VERSION INFO
INFRET: CALL CRLF ;OUTPUT CRLF
RET
;SUBROUTINE TO DISPLAY MICROCODE VERSION
;CALL WITH MICROCODE VERSION WORD IN T1
DEFSTR(ED.NUM,T1,↑D35,↑D10) ;FIELD FOR EDIT NUMBER IN T1
DEFSTR(VR.NUM,T1,↑D25,↑D6) ;FIELD FOR VERSION NUMBER IN T1
TMCVER: PUSH P,T1 ;SAVE VERSION NUMBER
LOAD Q2,VR.NUM ;GET THE VERSION NUMBER
CALL OUTOCT ;DISPLAY IT
MOVEI Q1,"(" ;DISPLAY LEFT PAREN
CALL TYO ;...
POP P,T1 ;RESTORE VERSION NUMBER
LOAD Q2,ED.NUM ;GET EDIT NUMBER
CALL OUTOCT ;DISPLAY IT
MOVEI Q1,")" ;DISPLAY RIGHT PAREN
CALL TYO ;...
RET
;SUBROUTINE TO OUTPUT BOOT VERSION
TYPBVR: MOVEI Q2,V%MAJOR ;OUTPUT MAJOR VERSION
CALL OUTOCT ;...
MOVEI Q1,"." ;OUTPUT A PERIOD
CALL TYO ;...
MOVEI Q2,V%MINOR ;OUTPUT MINOR VERSION
CALL OUTOCT ;...
MOVEI Q1,"(" ;OUTPUT A LEFT PAREN
CALL TYO ;...
MOVEI Q2,V%EDIT ;OUTPUT EDIT NUMBER
CALL OUTOCT ;...
MOVEI Q2,[ASCIZ/)
/] ;OUTPUT RIGHT PAREN + CRLF
CALL OUTSTR ;...
RET
;SUBROUTINE TO OUTPUT ASCIZ STRING
;CALL WITH STRING ADDR IN Q2
OUTSTR: HRLI Q2,(POINT 7,) ;MAKE ADDRESS INTO BYTE POINTER
OUTST1: ILDB Q1,Q2 ;PICK UP A CHARACTER
JUMPE Q1,R ;IF DONE, RETURN
CALL TYO ;OTHERWISE, TYPE IT
JRST OUTST1 ;AND LOOP FOR MORE
;SUBROUTINE TO OUTPUT OCTAL VALUES
;CALL WITH BINARY IN Q2
;ENTRY VECTORS:
; OUTOCN: ;ALLOW LEADING ZEROES
; OUTOCT: ;SUPRESS LEADING ZEROES
OUTOCN: SETOM Q3 ;ALLOW LEADING ZEROES
SKIPA
OUTOCT: SETZM Q3 ;SUPRESS LEADING ZEROES
PUSH P,Q3 ;CREATE A TEMPORARY FLAG
MOVE Q3,[POINT 3,Q2-1,35] ;USE TO FETCH 3-BIT OCTAL VALUE
JUMPN Q2,GETDG1 ;BYPASS LOOP-EXIT CODE FIRST TIME THROUGH
ILDB Q1,Q3 ;HERE IF HE GAVE US A ZERO
JRST OUTASC ;TYPE A "0"
; INSURES WE GET A ZERO EVEN IF SUPPRESSING
GETDIG: TLNN Q3,770000 ;TIME TO LEAVE?
JRST OCTRET ;YES
GETDG1: ILDB Q1,Q3 ;GET A PACKED OCTAL VALUE
SKIPN (P) ;NON-ZERO DIGIT SEEN YET?
JUMPE Q1,GETDIG ;NO, IF THIS DIGIT IS ZERO, TRY AGAIN
SETOM (P) ;INDICATE WE HAVE SEEN A NON-ZERO DIGIT
OUTASC: ADDI Q1,60 ;CONVERT TO ASCII
CALL TYO ;OUTPUT IT
JRST GETDIG ;GET ANOTHER DIGIT
OCTRET: ADJSP P,-1 ;RELEASE TEMPORARY STORAGE FOR FLAG
POPJ P, ;RETURN
;SUBROUTINE TO TYPE OUT STRUCTURE NAME
;CALL WITH STRUCTURE NAME IN Q2
TYPSTR: MOVE T1,[-6,,0]
SETZM Q1 ;INIT SHIFT AC
TYPST1: LSHC Q1,6 ;SHIFT A SIXBIT CHAR TO Q1
ADDI Q1,40 ;CONVERT TO ASCII
CALL TYO ;TYPE IT
SKIPE Q2 ;EXIT IF Q2 ZERO
AOBJN T1,TYPST1 ;BACK FOR MORE
STRRET: MOVEI Q1,":" ;ADD A COLON
CALL TYO
RET
;SUBROUTINE TO TYPE OUT FILENAME
TYPFIL: MOVEI Q1,"<" ;OUTPUT LEFT ANGLE
CALL TYO
MOVE Q2,DIRSTR ;TYPE DIRECTORY
CALL OUTSTR
MOVEI Q1,">" ;OUTPUT RIGHT ANGLE
CALL TYO
MOVE Q2,FILSTR ;TYPE FILE NAME
CALL OUTSTR
MOVEI Q1,"." ;OUTPUT PERIOD
CALL TYO
MOVE Q2,EXTSTR ;TYPE FILE EXTENSION
CALL OUTSTR
RET
IFE FT.MTA,<
MAPDIR: MOVEI P4,A%DIR ;GET ADDRESS FOR DIRECTORY HEADER
MOVE P5,A%XB ;GET DISK ADDRESS FOR FIRST PAGE OF DIR
JRST RDPGRT ;READ HEADER PAGE OF DIRECTORY
;MAP THE DIRECTORY INTO VIRTUAL ADDR DIR AND ABOVE
FNDIDX: MOVE P5,DIORG ;GET ADDRESS
MOVEI P4,A%XB ;INDEX BLOCK BUFFER
CALL REDPAG ;READ ROOT-DIR XB
$ERROR (IOER10) ;ERROR READING PAGE
CALL MAPDIR ;MAP IN ROOT DIR HEADER PAGE
MOVE T1,DIRSTR ;GET POINTER TO DIR STRING
MOVE T2,[POINT 7,[ASCIZ/DIRECTORY/]]
MOVEI T3,0 ;GET HIGHEST VERSION #
CALL GETIDX ;GET INDEX BLOCK OF DIR FILE
CALL MAPDIR ;MAP IN THE DIRECTORY
MOVE T1,FILSTR ;GET POINTER TO NAME STRING
MOVE T2,EXTSTR ;AND POINTER TO EXTENSION STRING
MOVE T3,VERNUM ;GET DESIRED VERSION #
;FALL INTO GETIDX
;HERE TO GET THE INDEX BLOCK FOR THE FILE
GETIDX: MOVEM T1,FNDSTR ;SAVE NAME STRING
DMOVEM T2,FNDSTE ;SAVE EXTENSION STRING POINTER
; AND SAVE VERSION NUMBER
CALL FIND ;RETURN FDB OFFSET IN P1
GX.NE: MOVE Q2,FNDSTE ;COMPARE WITH NEXT EXTENSION
CALL GETPAG ;MAP IN PAGE CONTAINING FDB
; RETURN WITH MAPPED ADDR IN T1
LOAD Q3,FBEXT,(T1) ;GET ADR OF EXT STRING BLOCK
HRLI Q3,(POINT 7,0) ;SET IT UP AS A STRING POINTER
ADDI Q3,1 ;POINT TO STRING
CALL STRCMP ;COMPARE STRINGS
CAIA
JRST GX.NV ;FOUND EXTENSION MATCH - LOOK AT VERSION
CALL GETPAG ;MAP IN PAGE CONTAINING FDB
LOAD P1,FBEXL,(T1) ;STEP TO NEXT FDB IN THIS CHAIN
JUMPN P1,GX.NE ;BACK IF STILL MORE
$ERROR (FILFNF) ;FILE NOT FOUND
GX.NV: CALL GETPAG ;MAP IN PAGE CONTAINING FDB
LOAD T1,FBGEN,(T1) ;GET GENERATION NUMBER
SKIPE FNDSTV ;IS MOST RECENT VER WANTED?
CAMN T1,FNDSTV ;IS IT WHAT WE WANT?
JRST GX.DON ;YES - EXIT
GX.NV1: CALL GETPAG ;MAP IN PAGE CONTAINING THE FDB
LOAD P1,FBGNL,(T1) ;STEP TO FDB OF NEXT GENERATION
SKIPN P1
$ERROR (FILFNF) ;File not found
JRST GX.NV ;TRY AGAIN
GX.DON: CALL GETPAG ;MAP IN PAGE CONTAINING FDB
LOAD T2,FBCTL,(T1) ;GET CONTROL BITS
TXNE T2,FB%DEL!FB%NXF ;DOES IT EXIST?
JRST GX.NV1 ;NO. GO GET ANOTHER THEN
MOVE T4,@FNDSTR ;GET 1'ST 5 CHARS OF FILE NAME
CAME T4,[BYTE (7) "D","U","M","P"] ;IS IT THE DUMP FILE?
JRST NOTDMP ;NO
MOVE T4,@FNDSTE ;GET EXTENSION
CAME T4,[BYTE (7) "E", "X", "E"] ;CORRECT EXTENSION?
JRST NOTDMP ;NO
LOAD T4,FBBYV,(T1) ;YES, GET PAGE COUNT
HRRZM T4,DEXEPC ;REMEMBER IT
NOTDMP: SETOM XBNUM ;INITIALIZE XB NUMBER TO SHORT FILE
LOAD P5,FBADR,(T1) ;GET ADR OF INDEX BLOCK
TXNN T2,FB%LNG ;LONG FILE?
JRST GX.DN1 ;NO, JUST READ IN INDEX BLOCK 0
MOVEI P4,A%SXB ;LONG FILE, READ IN THE SUPER INDEX BLOCK
CALL REDPAG ; INTO A%SXB
$ERROR (IOER2) ;ERROR READING PAGE
LOAD P5,IDXADR,A%SXB+0 ;GET ADR OF FIRST INDEX BLOCK
SKIPN P5 ;IF NO PAGE 0, FORMAT ERROR
$ERROR (FILNEF)
SETZM XBNUM ;MARK THAT INDEX BLOCK 0 IS MAPPED
GX.DN1: MOVEI P4,A%XB ;READ INTO XB AREA
RDPGRT: CALL REDPAG ;READ THE PAGE
$ERROR (IOER3) ;ERROR READING PAGE
RET
; ROUTINE TO MAP A PAGE OF THE DIRECTORY
; ACCEPTS IN P1/ ADDRESS TO MAP
; CALL GETPAG
; RETURNS +1 WITH T1/ MAPPED ADDRESS
GETPAG: HRRZ T1,P1 ;GET ADDRESS DESIRED FROM FILE
LSH T1,-↑D9 ;CONVERT ADDRESS TO PAGE NUMBER
MOVE P5,A%XB(T1) ;GET DISK ADDRESS OF FILE PAGE
MOVEI P4,A%DPG ;GET ADDRESS OF DIRECTORY DATA PAGE
CAMN P5,CURPAG ;DESIRED PAGE ALREADY IN CORE ?
JRST GETPG1 ;YES, DO NOT NEED TO READ AGAIN
CALL REDPAG ;NO, READ THE PAGE
$ERROR (IOER4) ;CAN'T READ DIRECTORY PAGE
GETPG1: LDB T1,[POINT 9,P1,35] ;GET LOW ORDER BITS OF ORIGINAL ADDRESS
IORI T1,A%DPG ;ADD ADDRESS OF DIRECTORY DATA PAGE
MOVEM P5,CURPAG ;UPDATE CURRENTLY IN-CORE PAGE
RET ;RETURN
;SUBROUTINE TO DO A PRIMARY NAME SEARCH IN A DIRECTORY
; CALL WITH BYTE POINTER TO FILENAME IN FNDSTR
; RETURN WITH OFFSET TO FDB FOR THAT FILE IN P1
FIND: MOVE T1,SYMBOT ;START OF ST AREA
SUB T1,SYMTOP ;GET -LENGTH
MOVE P1,SYMBOT ;BUILD A
ADDI P1,2 ;RELOCATE
HRLI P1,2(T1) ;AOBJN POINTER
FND.NF: MOVE Q2,FNDSTR ;FILE NAME
CALL GETPAG ;MAP IN PAGE CONTAINING S.T. ENTRY
LOAD Q3,SYMET,(T1) ;GET SYMBOL TYPE
SKIPE Q3
$ERROR(FILFNF) ;FILE NOT FOUND
LOAD Q3,SYMVL,(T1) ;GET FIRST FIVE CHARS OF NAME
CAME Q3,@FNDSTR ;IS THIS A MATCH AGAINST STRING?
JRST FND.NM ;NO, NO NEED TO COMPARE NAME STRING
LOAD Q3,SYMAD,(T1) ;GET FDB ADDRESS
PUSH P,P1 ;SAVE POINTER INTO SYMBOL TABLE
MOVE P1,Q3 ;GET ADDRESS OF FDB
CALL GETPAG ;MAP IN PAGE CONTAINING FDB
POP P,P1 ;RESTORE SYMBOL TABLE POINTER
LOAD Q3,FBNAM,(T1) ;GET ADDRESS OF NAME STRING BLOCK
HRLI Q3,(POINT 7,0) ;SET UP STRING POINTER
ADDI Q3,1 ;POINT TO STRING
CALL STRCMP ;COMPARE STRINGS
FND.NM: JRST [ ADD P1,[1,,1] ;NO MATCH, STEP OVER SYMBOL VALUE
AOBJN P1,FND.NF
$ERROR (FILFNF)] ;NO MORE NAMES, ERROR
CALL GETPAG ;MAP IN PAGE CONTAINING S.T. ENTRY
HRRZ P1,(T1) ;GET FIRST FILE FDB
RET
;STRING COMPARE SUBROUTINE
STRCMP: PUSH P,P1 ;SAVE P1
MOVE P1,Q3 ;COPY ADDRESS OF STRING IN FILE
CALL GETPAG ;MAP PAGE CONTAINING STRING BLOCK
POP P,P1 ;RESTORE P1
HRR Q3,T1 ;INSERT MAPPED ADDRESS TO STRING
STRCM1: ILDB T1,Q2 ;GET 1ST BYTE
ILDB T2,Q3 ;GET 2ND BYTE
CAME T1,T2 ;EQUAL?
RET ;NO - LOSE
JUMPN T1,STRCM1 ;YES -END OF STRING?
RETSKP ;SKIP RETURN
>;END IFE FT.MTA
REDPAG: SKIPA T1,[.RHSTR!LR!RCLP!STLW!<-4&1777>B29!R4%CRD!GO] ;RH20 READ DATAO
WRTPAG: MOVE T1,[.RHSTR!LR!<-4&1777>B29!RCLP!STLW!R4%CWR!GO] ;RH20 WRITE DATAO
AOS FILPAG ;INCREMENT FILE PAGE #
PUSH P,P2 ;SAVE COUNTER
MOVEI P2,5 ;RETRY COUNT
IFN FT.MTA, <
MOVEI P2,↑D100 ;RETRY COUNT FOR MAGTAPE
JRST MRETRY ;YES, GO DO TAPIO
> ; END OF IFN FT.MTA
IFE FT.MTA, <
DRETRY: CALL IOSET ;SETUP CHANNEL, DO SEEK
SOJG P2,DRETRY ;TRY SEEK ET AL AGAIN
SKIPN P2
$ERROR (IOER5) ;RETRY ERROR
CALL DOIO ;START IO AND WAIT
CALL CHNRST ;IF RH'S, RESTOE CHANNEL
EXCH T1,T4 ;GET BACK ORIGINAL COMMAND
JUMPG T4,RWSXIT ;IF NO ERRORS, EXIT SUCCESSFULLY
SOJG P2,DRETRY ;GO RETRY TIL COUNT EXHAUSTED
JRST RWFXIT ;OPERATION FAILED
> ; END OF IFE FT.MTA
IFN FT.MTA,<
MRETRY: CALL TAPIO ;DO IO
JRST RWSXIT ;WIN
SOSG P2 ;DO RETRY?
$ERROR (TAPHTE) ;NO - HARD TAPE ERROR
CALL BSPACE ;YES - BACKSPACE
JRST MRETRY ;LOOP
> ;END IFN FT.MTA
RWSXIT: AOS -1(P) ;SKIP RETURN
RWFXIT: POP P,P2 ;RESTORE P2
RET ;RETURN
IFE FT.MTA, <
;DISK IO SUBROUTINES - DISK DEPENDENT PARTS.
DOIO: SAVPI T2 ;SAVE PI ASSIGNMENT
IOOP(CLEAR) ;CLEAR CONTROLLER/UNIT
MOVSI T1,2 ;DELAY COUNT
IOOP(XCTOP,T4) ;EXECUTE OPERATION
WAIT: IOOP(SKIPDONE) ;SKIP IF DONE
SOJG T1,WAIT ;LOOP
RESPI T2 ;RESTORE PI ASSIGNMENT
JUMPLE T1,CPOPJ ;RETURN IF TIMEOUT
IOOP(SKIPNOERR) ;SKIP IF NO ERRORS
SETOI T1, ;YES - SET T1 MINUS AS FLAG
RET ;RETURN
> ; END OF IFE FT.MTA
;THIS RANDOM INSTRUCTION FROM PARSE IS HERE TO SAVE SPACE
P.NOS: TLO F,(F.STRT!F.CLR!F.ACT) ;DEFAULT WHEN NO SWITCHES
RET ;RETURN
CHNRST: PUSH P,T1 ;SAVE 1
MOVX T1,.RHIVR!LR ;INTERRUPT VECTOR REGISTER
HRR T1,INIVEC ;GET INITIAL CONTENTS
CALL IOXCT ;GO WRIET DEVICE REGISTER
DATAO .-.,1
MOVE T1,PIA ;GET RH20 PI ASSIGNMENT
CALL IOXCT ;GET DEVICE CODE
CONO .-.,.RHDON!.RHAIE(T1) ;RESTORE ORIGINAL PI ASSIGNMENT
POP P,T1 ;RESTORE 1
RET ;AND DONE
IFE FT.MTA, <
IOSET: PUSH P,T1 ;SAVE RP04 COMMAND
MOVE T1,P5 ;GET DISK ADDRESS
IFE STANSW,<
TLZ T1,777774 ;KEEP JUST THE ADDRESS BITS
>;IFE STANSW
IFN STANSW,<
IFE WAITSW!SCORSW!SUMXSW,<
TLZ T1,777774 ;KEEP JUST THE ADDRESS BITS
>;IFE SCORSW!SUMXSW
IFN WAITSW!SCORSW!SUMXSW,<
TLZ T1,777760 ;KEEP JUST THE ADDRESS BITS
>;IFN SCORSW!SUMXSW
>;IFN STANSW
MOVE T2,DSKTYP ;FIND TYP
CAIN T2,.R7TYP
JRST [ IDIVI T1,N.SCL7 ;RP07?
JRST IOSETC]
CAIN T2,.R3TYP ;RM03?
JRST [ IDIVI T1,N.SCL3
JRST IOSETC]
IDIVI T1,N.SCL4 ;GET CYLINDER IN T1, SECTOR IN T2
IOSETC: PUSH P,T2 ;SAVE SECTOR WITHIN CYLINDER
IDIV T1,NUMCYL ;GET UNIT NUMBER IN T1, CYL IN T2
HRRZ P3,DSKTAB(T1) ;GET PHYSICAL UNIT NUMBER
HLRZ T1,DSKTAB(T1) ;GET CHANNEL #, ENTRY-IN-USE FLAG
TRZ T1,ENTFLG ;KEEP JUST THE CHANNEL NUMBER
HRRI F,RH0←-2(T1) ;GET IO DEVICE CODE
LSH T1,2 ;GET CHANNEL * 4
MOVE T3,[1B1+ICCW] ;GET JUMP CCW
MOVEM T3,A%EPT+ICA(T1) ;STORE JUMP CCW IN EPT FOR RH20
CALL IOXCT ;GO GET RH20 DEVICE CODE
CONI .-.,T1 ;GET RH20 PI ASSIGNMENT
ANDI T1,.RHMBE+7 ;KEEP JUST MB ENABLE AND PI
MOVEM T1,PIA ;SAVE RH20 PI ASSIGNMENT
MOVX T1,.RHIVR ;INTERRUPT VECTOR REGISTER
CALL RHRD ;GET ORIGINAL CONTENTS OF IVR
ANDI T1,177777 ;KEEP JUST DATA BITS
MOVEM T1,INIVEC ;NO, SAVE INITIAL IVR CONTENTS
IOOP(CLEAR) ;RESET RH20
MOVX T1,R4%DCA!LR ;DESIRED CYLINDER REGISTER IN RP04
HRR T1,T2 ;GET DESIRED CYLINDER #
CALL RHWT ;TELL RP04 WHICH CYLINDER
POP P,T1 ;RESTORE SECTOR WITHIN CYLINDER
MOVE T2,DSKTYP ;GET DISK TYPE AGAIN
CAIN T2,.R7TYP ;RP07?
SKIPA T2,[N.STK7] ;YES
MOVEI T2,N.STK4 ;NO
IDIVI T1,(T2) ;GET TRACK # IN T1, SECTOR IN T2
LSH T1,↑D8 ;POSITION THE TRACK # FOR DATAO
IOR T1,T2 ;ADD A PINCH OF SECTOR
PUSH P,T1 ;SAVE DISK ADDRESS
TXO T1,R4%DST!LR ;RP04 DESIRED SECTOR AND TRACK REGISTER
CALL RHWT ;GO WRITE SECTOR, TRACK REGISTER
POP P,T1 ;RESTORE DISK ADDRESS
TXO T1,.RHSBR!LR ;RH20 BLOCK ADDRESS REGISTER
CALL RHWT ;TELL RP04 WHERE THE DATA IS
POP P,T4 ;RESTORE ORIGINAL INSTRUCTION
IOSET0: TSO T4,P3 ;INSERT UNIT # INTO COMMAND
CALL GETPHY ;GET PHYSICAL ADDR IN T1
$ERROR (MEMMRF) ;BAD ADDRESS
JUMPN T1,IOSET1 ;PAGE 0?
MOVSI T1,(EXP 1B0+<LCORAD>B13) ;YES - SKIP FIRST FEW WDS
MOVEM T1,ICCW ;STORE AS FIRST ELEMENT
MOVE T1,[EXP 1B0+1B1+<1000-LCORAD>B13+LCORAD]
MOVEM T1,ICCW+1 ;SECOND AND LAST CCW
JRST CPOPJ1 ;GO DO IO
IOSET1: TLO T1,(EXP 1B0+1B1+<1000>B13) ;BUILD CCW
MOVEM T1,ICCW ;STORE
JRST CPOPJ1 ;RETURN
>; END OF IFE FT.MTA
IFN FT.MTA,<
;HERE TO SETUP THE CHANNEL FOR TAPE IO
TAPIO: LDB T4,PCHAN ;GET CHANNEL NUMBER
HRRI F,RH0←-2(T4) ;SET IO ADDRESS
LDB P3,PKON ;GET TM02
CALL IOXCT ;GET DEVICE CODE
CONI .-.,T1 ;GET RH20 PI ASSIGNMENT
ANDI T1,.RHMBE+7 ;KEEP JUST PI
SKIPN PIA ;SAVED PI ASSIGNMENT YET ?
MOVEM T1,PIA ;NO, SAVE IT NOW
MOVX T1,.RHIVR ;INTERRUPT VECTOR REGISTER
CALL RHRD ;GET ORIGINAL CONTENTS OF IVR
ANDI T1,177777 ;KEEP JUST DATA BITS
SKIPN INIVEC ;SAVED ORIGINAL CONTENTS YET ?
MOVEM T1,INIVEC ;NO, SAVE INITIAL IVR CONTENTS
CALL IOXCT ;GET DEVICE CODE
CONO .-.,.RHMBE!.RHRAE!.RHCTE!.RHDON ; RESET RH20
CALL @TAPSIO(P6) ;SET CONTROLLER TO START THE IO
MOVE T1,[EXP .TMATR!LR+377] ;CLEAR ATTN
CALL RHWT ;
MOVE T1,[EXP 1B1+ICCW] ;CHANNEL JUMP TO ICCW
LSH T4,2 ;COMPUTE OFFSET INTO EPT
MOVEM T1,A%EPT+ICA(T4) ;STORE
CALL GETPHY ;GET PHYS ADDR
$ERROR (MEMMRF) ;BAD ADDRESS
JUMPN T1,TAPIO1 ;PAGE 0?
MOVSI T1,(EXP 1B0+<LCORAD>B13) ;YES - SKIP FIRST FEW WDS
MOVEM T1,ICCW ;STORE AS FIRST ELEMENT
MOVE T1,[EXP 1B0+1B1+<1000-LCORAD>B13+LCORAD]
MOVEM T1,ICCW+1 ;SECOND AND LAST CCW
JRST TAPIO2 ;GO DO IO
TAPIO1: TLO T1,(EXP 1B0+1B1+<1000>B13) ;BUILD CCW
MOVEM T1,ICCW ;STORE
TAPIO2: MOVE T1,[EXP .RHSTR!LR!RCLP+.TMRDF+1777B29] ;SEND COMMAND
CALL RHWT ; ...
MOVSI T2,1 ;SET WAIT COUNT
TAPWAT: CALL IOXCT ;GET DEVICE CODE
CONI .-.,T1 ;GET DEVICE STATUS
TRNN T1,.RHDON ;DONE ?
SOJG T2,TAPWAT ;NO - LOOP
TRNN T1,775000 ;ERRORS+
JUMPG T2,CPOPJ ; NO - EXIT
JRST CPOPJ1 ;YES - SKIP
BSPACE: CALL IOXCT ;GET IO CODE
CONO .-.,2000 ;RESET THE RH20 BEFORE
CALL IOXCT ; DOING BACKSPACE
CONO .-.,4600 ;...
CALL @STRTMP(P6) ;START THE MICRO PROCESSOR (IF DX20)
CALL @BACKRC(P6) ;BACKSPACE A RECORD
MOVSI T2,5 ;TIMED WAIT
CALL @BKWAIT(P6) ;WAIT FOR BACKSPACE TO FINISH
MOVE T1,[EXP .TMATR!LR+377] ;CLEAR ATTN
CALL RHWT ;
SKIPN T2 ;TIMEOUT?
$ERROR (TAPHTE) ;YES - HARD TAPE ERROR
RET ;NO
PCHAN: POINT 6,DSKTAB,23 ;POINTER TO CHAN NUMBER
PKON: POINT 6,DSKTAB,29 ;POINTER TO KON NUMBER
PUNIT: POINT 6,DSKTAB,35 ;POINT TO TAPE UNIT
;START IO
TAPSIO: TM2SIO
DX2SIO
TM8SIO
;START MICROPROCESSOR
STRTMP: R
STDX20
R
;BACKSPACE RECORD
BACKRC: TM2BSR
TM2BSR
TM8BSR
;WAIT FOR BACKSPACE TO FINISH
BKWAIT: BWAIT
BXWAIT
R ;(WAITED WHEN WE STARTED IT)
TM2SIO: MOVEI T1,TMCD16 ; SET DENSITY
LDB T2,PUNIT ;GET DRIVE NUMBER
IOR T1,T2 ; ...
HRLI T1,(.TMTCR!LR) ;TAPE CONTROL REG
CALLRET RHWT ; ...
TM8SIO: MOVEI T1,5000 ;SET THE BYTE COUNT REGISTER
HRLI T1,(LR!.T7BC) ;TELL THE HARDWARE HOW MUCH WE'LL READ
CALL RHWT
LDB T1,PUNIT ;SLAVE NUMBER
TRO T1,T7.SER!T7.CDP!T7.1RC ;NO ERROR REPOS, CORE DUMPE, 1 RECORD
HRLI T1,(.T7FMT!LR) ;WRITE THE FORMAT REG
CALLRET RHWT
TM2BSR: MOVE T1,[EXP .TMFCR!LR+177777] ;REPEAT COUNT
CALL RHWT ;
MOVE T1,[EXP .TMCSR!LR+.TMBSF] ;DO BACKSPACE
CALLRET RHWT ;
TM8BSR: MOVEI T1,T7.BSR←6 ;BACK 1 RECORD
PUSH P,P2
MOVE P2,P3
LDB P3,PUNIT ;GET ACS RIGHT
CALL T78.ND ;DO IT AND WAIT TILL DONE
POP P,P2
LDB P3,PKON ;RESTORE ACS
RET
BWAIT: MOVSI T1,(.TMDSR) ;WAIT FOR NO POSN
CALL RHRD ;
TRNE T1,TMSPIP ;DONE YET?
SOJG T2,BWAIT ;NO
RET
DX2SIO: ;no DX20 support
STDX20:
BXWAIT: RET
>;IFN FT.MTA
RHRD: TLZ T1,(LR) ;NO WRITE
RHWT: TSO T1,P3 ;INSERT TM02
CALL IOXCT
DATAO .-.,T1 ;SEND COMMAND
CALL IOXCT
DATAI .-.,T1 ;READ RESULT
RET
;SUBROUTINE TO GET THE PHYSICAL ADDRESS CORRESPONDING
;TO THE ADDRESS IN P4 (EITHER PHYS OR VIRT DEPENDING ON F.PHYS)
;RETURN THE RESULT IN T1
;RETURNS NON-SKIP IF THE ADDR PAGE FAULTS OR NXMS
; PAGE TABLE SLOT USED FOR THIS TEST IS FOR THE LAST FREE PAGE BEFORE VBOOT
TSTSLT== <VFREE>+A%PTB ;PAGE TABLE SLOT FOR TESTING
;I.E., THE SLOT IN A%PTB CORRESPONDING TO PAGE
; VFREE
TSTADD==<VFREE>←9 ;ADDRESS OF TEST PAGE
GETPHY: MOVE T1,P4 ;COPY ADDRESS
LSH T1,-9 ;CONVERT ADDRESS TO PAGE NUMBER
TXNE F,F.PHYS ;PHYSICAL ADDRESS FOR ARGUMENT ?
JRST GPY.P0 ;YES, GO TEST FOR EXTANT PAGE
; ARGUMENT IS A VIRTUAL ADDRESS - CONVERT TO PHYSICAL AND TEST
MAP T1,(P4) ;GET PHYSICAL PAGE NUMBER
TLNN T1,(1B2) ;IS PAGE ACCESSIBLE ?
RET ;NO, RETURN
TLZ T1,777760 ;YES, CLEAR ALL BITS BUT ADDRESS
LSH T1,-↑D9 ;CONVERT ADDRESS TO A PAGE #
; HERE WITH A PHYSICAL ADDRESS TO TEST
;NOT ALL PHYSICAL PAGES MAY BE IN THE VIRTUAL MAP, SO FOR TESTING WE
;TEMPORARILY SNEAK THE PHYSICAL ADDRESS INTO A PAGE-TABLE SLOT AND TRY
;TO REFERENCE THE VIRTUAL PAGE ASSOCIATED WITH THAT SLOT.
GPY.P0: TXO T1,IMMPTR ;FORM IMMEDIATE POINTER (+WRITEABLE+CACHEABLE)
PUSH P,TSTSLT ;SAVE EXISTING PAGE TABLE ENTRY
MOVEM T1,TSTSLT ;MAP PAGE TO BE TESTED
CLRPT TSTADD ;INVALIDATE PAGE TABLE ENTRY FOR PAGE REFERENCED
; BY "E", INVALIDATE CACHE
CONO APR,AP.RNX ;TURN OFF NXM FLAG
SKIP TSTADD ;REFERENCE VIRTUAL PAGE
HRRZ T1,TSTSLT ;GET PHYSICAL PAGE #
LSH T1,9 ;CONVERT TO PHYSICAL ADDRESS
POP P,TSTSLT ;RESTORE ORIGINAL MAP ENTRY
CONSO APR,AP.NXM ;NXM ON REFERENCE ?
JRST CPOPJ1 ;NO, GIVE GOOD RETURN
CONO APR,AP.RNX ;YES, RESET NXM FLAG
RET ;RETURN BAD
;SUBROUTINE TO TEST IF A GIVEN VIRTUAL ADDRESS IS LEGAL
;VIZ DOES THE ADDR PAGE FAIL, NXM , OR POINT TO A VBOOT PAGE?
;IF SO, RETURN NON SKIP
;FIRST, SEE IF THE ADDRESS SURVIVES PAGE-FAIL OR NXM TEST
TSTADR: MOVE T1,P4 ;GET ADDR TO TEST
LSH T1,-9 ;CONVERT TO PAGE
CAMG T1,UPRLIM ;BELOW UPPER LIMIT?
CAMGE T1,LWRLIM ;ABOVE LOWER LIMIT?
RET ;NO - BAD
CALL GETPHY ;CONVERT TO PHYSICAL ADDR
RET ;BAD RETURN FROM GETPHY
PUSH P,P4 ;SAVE DEST
PUSH P,F ;SAVE FLAGS
TLZ F,(F.PHYS) ;TEST VIRT ADDR
MOVE T2,T1 ;PHYS ADDR
MOVEI P4,A%VFST ;START OF VBOOT AREA
;OK SO FAR, SEE IF THE PHYSICAL ADDRESS CORRESPONDS TO THE
;PHYSICAL ADDRESS OF ANY VBOOT PAGES - IF SO, GIVE BAD RETURN
TA.NXT: CALL GETPHY ;CONVERT TO PHYS ADDR
$ERROR (MEMMRF) ;IMPOSSIBLE CONDITION
CAMN T1,T2 ;SAME AS TARGET ADDR?
JRST TA.BAD ;YES - FAIL RETURN
ADDI P4,1000 ;NO - TRY NEXT PAGE
CAIG P4,VORG←9 ;CHECKED ALL PAGES?
JRST TA.NXT ;NO - LOOP FOR MORE
AOS -2(P) ;SKIP RETURN (THIS IS PRETTY BAD...)
TA.BAD: POP P,F ;RESTORE FLAGS
POP P,P4 ;RESTORE ADDRESS
RET ;NON-SKIP RETURN
;ERROR MESSAGES
DEFINE ERSTR (SYM,TEXT),
< SYM=%COUNT
%COUNT=%COUNT+1
[ASCIZ/TEXT/]
>
ERRPFX: [ASCIZ/ ?BOOT: /]
%COUNT=0 ;RESET COUNTER
ERRTAB: ERSTR (IOER2,IO error - can't read super-index block)
ERSTR (IOER3,IO error - can't read index block)
ERSTR (IOER4,IO error - can't read directory page)
ERSTR (IOER5,IO error - seek retry count exceeded)
ERSTR (IOER6,IO error - can't read EXE-directory page)
ERSTR (IOER7,IO error - can't read data page)
ERSTR (IOER8,IO error - can't write data page)
ERSTR (IOER9,IO error - can't write EXE-directory page)
ERSTR (FILFNF,File not found)
ERSTR (FILNEF,File not in EXE format)
ERSTR (FILDRP,File's EXE-directory is longer than 1 page)
ERSTR (IOER10,IO error - can't read root-directory index block)
ERSTR (STRHOM,Bad home block)
ERSTR (STRSNF,Structure not found)
ERSTR (STRNID,No structure ID)
ERSTR (STRNBS,Can't find bootable structure)
ERSTR (STRMTO,More than 1 bootable structure found)
ERSTR (DMPFTS,Dump error - DUMP.EXE is too small: reconfigure with MAKDMP)
ERSTR (COMERR,Command error)
ERSTR (COMUNS,Unknown switch)
ERSTR (COMINV,Invalid numeric value)
ERSTR (MEMMRF,Memory reference failed)
ERSTR (DSKHDE,Hard disk error)
ERSTR (TAPHTE,Hard tape error)
ERSTR (TAPNDR,No ready tape-drive available)
ERRSTR=STRNID ;LAST ERROR MESSAGE FOR WHICH A STRUCTURE NAME
; WILL BE OUTPUT
ERRFIL=FILDRP ;LAST ERROR MESSAGE FOR WHICH A FILENAME WILL
; BE OUTPUT
;SUBROUTINE TO CLEAR CORE
CLRCOR: SETOI P4, ;INITIALIZE ADDRESS
CLR.NP: ADDI P4,1000 ;NEXT PAGE
TLNE P4,-1 ;DONE 256K?
RET
CALL TSTADR ;NO - TEST IF ADDRESS LEGAL
JRST CLR.NP ;NOT LEGAL - TRY NEXT PAGE
MOVE T1,P4 ;COPY ADDRESS
TRZ T1,777 ;CLEAR LOW ORDER BITS
SKIPN T1 ;PAGE ZERO?
MOVEI T1,LCORAD ;YES - START AT LOC LCORAD
CLR.NW: SETZM (T1) ;CLEAR A WORD OF THE PAGE
CAIGE T1,(P4) ;DONE?
AOJA T1,CLR.NW ;NO - LOOP FOR MORE OF THIS PAGE
JRST CLR.NP ;YES - LOOP FOR MORE
;GET, SAVE - not for EXE file
IFE FT.EXE, <
;ROUTINE TO GET A FILE FROM DISK TO MEMORY
;THE VIRTUAL ADDRESSES NEEDED BY THE FILE ARE ASSUMED
;TO HAVE BEEN MAPPED BY THE CALLER
GET: MOVEI P4,A%FP0 ;READ FILE PAGE ZERO
MOVE P5,A%XB ; DISK ADDR FROM XB
CALL REDPAG ;READ THE PAGE
$ERROR (IOER6) ;CAN'T READ DIRECTORY PAGE
HLRZ T1,A%FP0 ;CHECK FORMAT CODE
CAIE T1,1000 ;CODE OK?
$ERROR (FILNEF) ;NO
TLNE F,(F.CLR) ;CLEAR CORE?
CALL CLRCOR ;YES - CALL SUBR
MOVN P1,A%FP0 ;OK - GET COUNT OF PAGES
HRLZS P1 ;BUILD POINTER WORD
HRRI P1,A%FP0+1 ;FIRST DATA WORD
GET.NP: MOVE T1,(P1) ;GET PAGE DESCRIPTOR
MOVE P5,A%XB(T1) ;GET DISK ADDRESS OF PAGE
LDB P4,[POINT 9,T1,17] ;GET MEMORY PAGE ADDR
LSH P4,9 ;CONVERT PAGE NO. TO ADDRESS
CALL TSTADR ;CHECK IF ADDRESS IS LEGAL
JRST GT.NP1 ;NO - SKIP READ
CALL REDPAG ;READ THE PAGE
$ERROR (IOER7) ;CAN'T READ DATA PAGE
GT.NP1: AOBJN P1,GET.NP ;BACK FOR MORE
SKIPG P3,(P1) ;IF POSITIVE, IS IMMED. ADDR
MOVE P3,(P3) ;IF NEG, IS POINTER
CALLRET SETSA ;SET STARTING ADDR AND RETURN
;ROUTINE TO SAVE MEMORY -- ONLY THOSE PAGES WHICH ARE MAPPED ARE SAVED.
SAVE: MOVEI Q2,[ASCIZ/[BOOT: DUMPING] /]
CALL OUTSTR
MOVE T1,[XWD A%FP0,A%FP0+1] ;CLEAR DESCR PAGE
SETZB P2,A%FP0 ; ...
BLT T1,A%FP0+777 ; ...
TLNE F,(F.DUMP) ;DUMP?
TLO F,(F.PHYS) ;YES - USE PHYSICAL ADDRESSES.
SETOI P1, ;INITIALIZE ADDR
SETZM PGCNT ;ZERO COUNT OF DISK PAGES WRITTEN
TXZ F,F.DPER ;RESET DUMP ERROR FLAG
SAV.NP: ADDI P1,1000 ;NEXT PAGE
TLNE P1,-1 ;DONE ALL?
JRST SAV.DN ;YES - WRITE DESCR PAGE
MOVE P4,P1 ;NO - SAVE ADDR FOR WRITE
CALL TSTADR ;IS THIS ADDRESS LEGAL?
JRST SAV.NP ;NO - TRY NEXT PAGE
LSH P4,9 ;MASK LOW ORDER BITS
HLLZS T1,P4 ;SAVE PAGE FOR DESCR
LSH P4,-9 ;RECOVER ADDRESS
TLO T1,520000 ;READ,WRITE,EXECUTE ACCESS
HRRI T1,2(P2) ;FILE PAGE NUMBER
MOVEM T1,A%FP0+1(P2) ;STORE DESCRIPTOR
SKIPN P5,A%XB+2(P2) ;PHYS DISK ADDR - SKIP IF NONE
JRST SV.NP1
CALL WRTPAG ;WRITE THE PAGE
$ERROR(IOER8) ;COULDN'T WRITE IT
SV.NP1: AOJA P2,SAV.NP ;NEXT PAGE
SAV.DN: SKIPE T1,START ;NONZERO START ADDR?
HRLI T1,(<JRST>) ;YES - BUILD SHORT ENTRY
MOVEM T1,A%FP0+1(P2) ;STORE IN DESCR PAGE
TLO P2,1000 ;FINISH DESCRIPTOR BLOCK
MOVEM P2,A%FP0 ;BY STORING TYPE AND COUNT
TLZ F,(F.PHYS) ;CLEAR PHYSICAL ADDRESS REQUEST
MOVEI P4,A%FP0 ;PREPARE FOR FINAL WRITE
MOVE P5,A%XB ; ...
CALL WRTPAG ;WRITE THE DESCR PAGE AND RETURN
$ERROR(IOER9) ;COULDN'T WRITE DIRECTORY PAGE
MOVEI Q2,[ASCIZ/[OK]
/]
CALL OUTSTR
RET
>;IFE FT.EXE
;Process EXE Files. GET file
IFN FT.EXE, <
; EXE BLOCK TYPE DISPATCH TABLE
EXETAB: .EXDIR ,, G.DIR
.EXEND ,, R
.EXENT ,, G.ENT
EXESIZ==.-EXETAB
; ROUTINE TO GET A FILE FROM DISK TO MEMORY. READS EXE FORMAT FILES.
GET:
IFN FT.MTA,< ;ONLY FOR MAGTAPE
SKIPE DIRFLG ;EXE DIRECTORY READ YET ?
JRST G.CLR ;YES, DO NOT READ IT AGAIN
SETOM DIRFLG ;NO, INDICATE WE HAVE READ EXE DIR
>;IFN FT.MTA
SETZM FILPAG ;INITIALIZE FILE PAGE #
MOVEI P4,A%FP0 ;READ INTO FILE PAGE 0
MOVE P5,A%XB+0 ;EXE DIRECTORY IS PAGE 0 OF FILE
CALL REDPAG ;READ THE EXE DIRECTORY PAGE
$ERROR (IOER6) ;CAN'T READ DIRECTORY PAGE
G.CLR: ; ** REMOVED NEXT 2 INSTRUCTIONS UNTIL MAP INSTR FIXED **
TXNE F,F.CLR ;CLEAR CORE ?
CALL CLRCOR ;YES, GO ZERO SOME MEMORY
MOVEI P1,A%FP0 ;INITIALIZE EXE DIRECTORY POINTER
G.DSP: HLRZ T1,(P1) ;GET BLOCK TYPE FROM DIRECTORY
MOVSI T2,-EXESIZ ;FORM AOBJN POINTER TO TYPE TABLE
G.DSP1: HLRZ T3,EXETAB(T2) ;GET A KNOWN BLOCK TYPE CODE
CAMN T3,T1 ;FOUND A VALID BLOCK TYPE ?
JRST G.GO ;YES, GO PROCESS THE BLOCK
AOBJN T2,G.DSP1 ;NO, GO CHECK REMAINING VALID CODES
$ERROR (FILNEF) ;BAD FORMAT
G.GO: HRRZ T1,EXETAB(T2) ;GET ADDRESS OF PROCESSING ROUTINE
JRST (T1) ;GO PROCESS BLOCK
; HERE TO PROCESS EXE FILE DIRECTORY BLOCK
G.DIR: HRRZ P2,(P1) ;GET # OF WORDS IN EXE DIRECTORY
SUBI P2,1 ;GET # OF WORDS IN DIRECTORY - 1
ADDI P1,1 ;POINT TO FIRST 2-WORD DESCRIPTOR
G.DIR0: LOAD Q2,DIRPT,(P1) ;GET REPEAT COUNT
ADDI Q2,1 ;GET # OF PAGES TO READ
LOAD P4,DIPRO,(P1) ;GET PROCESS PAGE #
LSH P4,9 ;CONVERT PAGE # TO ADDRESS
LOAD Q1,DIFIL,(P1) ;GET FILE PAGE #
G.DIR1: JUMPE Q1,G.DIR4 ;ALL ZERO PAGE, HANDLE SPECIALLY
CALL TSTADR ;GO SEE IF MEMORY ADDRESS IS LEGAL
JRST G.DIR2 ;NOT LEGAL, GO TRY NEXT PAGE
IFN FT.MTA,< ;DOING MAGTAPE?
CAMGE Q1,FILPAG ;READING PAGE ALREADY PASSED ?
$ERROR (FILNEF) ;YES, CANNOT GO BACKWARDS ON TAPE
CAMLE Q1,FILPAG ;NEED NEXT SEQUENTIAL PAGE IN FILE ?
JRST [ PUSH P,P4 ;NO, SAVE CORE ADDRES
MOVEI P4,A%DIR ;GET A USELESS PAGE FOR DUMMY READ
CALL REDPAG ;READ NEXT SEQUENTIAL PAGE
$ERROR (IOER7) ;ERROR READING PAGE
POP P,P4 ;RESTORE ORIGINAL CORE ADDRESS
JRST G.DIR1 ] ;GO TRY AGAIN
>;IFN FT.MTA
MOVE P5,A%XB(Q1) ;GET DISK ADDRESS FROM INDEX BLOCK
CALL REDPAG ;READ A DATA PAGE FROM EXE FILE
$ERROR (IOER7) ;ERROR READING PAGE
CALL CHGLIM ;CHANGE PAGE LIMITS IF NECESSARY
G.DIR2: SOJLE Q2,G.DIR3 ;DECREMENT REPEAT COUNT, LOOP IF MORE
ADDI P4,1000 ;NO MORE. POINT TO NEXT PROCESS PAGE
AOJA Q1,G.DIR1 ;GO READ NEXT PAGE OF EXE FILE.
G.DIR3: ADDI P1,.DISIZ ;POINT TO NEXT DESCRIPTOR
SUBI P2,.DISIZ ;DECREMENT DIRECTORY BLOCK WORD COUNT
JUMPE P2,G.DSP ;GO PROCESS NEXT BLOCK IF DONE
JRST G.DIR0 ;GO READ NEXT SET OF PAGES FROM EXE FILE
G.DIR4: CALL TSTADR ;TEST PAGE FOR LEGALITY
JRST G.DIR5 ;BAD PAGE, DO NOT CLEAR IT
SETZM (P4) ;CLEAR FIRST WORD OF PAGE
MOVSI T1,(P4) ;GET START ADDRESS FOR BLT
HRRI T1,1(P4) ;GET DESTINATION ADDRESS FOR BLT
BLT T1,777(P4) ;CLEAR PAGE TO ZEROS
G.DIR5: SOJA Q1,G.DIR2 ;GO SEE IF MORE PAGES TO CLEAR
; HERE TO PROCESS ENTRY VECTOR BLOCK
G.ENT: SKIPN 1(P1) ;ENTRY VECTOR SIZE NON-ZERO ?
$ERROR (FILNEF) ;NO, BAD FILE FORMAT
MOVE P3,@2(P1) ;YES, GET START ADDRESS
CALL SETSA ;GO SET STARTING ADDRESS
HRRZ T1,(P1) ;GET SIZE OF ENTRY VECTOR BLOCK
ADD P1,T1 ;UPDATE POINTER INTO EXE DIRECTORY
JRST G.DSP ;GO HANDLE NEXT EXE FILE BLOCK
;SUBROUTINE TO SEE IF THE UPPER LIMIT FOR READING OF A FILE SHOULD
;BE CHANGED AS SPECIFIED BY THE SYMBOL TABLE POINTER. DISABLED IF ANY
;SPECIFIC CORE LIMITS WERE SPECIFIED, OR IF .JBSYM IS ZERO.
CHGLIM: JUMPN P4,R ;ONLY CHECK PAGE 0 OF CORE IMAGE
TXNN F,F.NCHL ;DON'T WANT TO CHANGE THE LIMITS?
SKIPN T1,.JBSYM ;OR HAVE NO SYMBOL POINTER?
RET ;YES, DO NOTHING
HLRE T2,T1 ;GET NEGATIVE LENGTH
SUB T1,T2 ;COMPUTE ADDRESS RIGHT AFTER SYMBOL TABLE
MOVEI T1,-1(T1) ;BACK OFF TO LAST ADDRESS TO READ
LSH T1,-↑D9 ;CONVERT TO PAGE NUMBER
MOVEM T1,UPRLIM ;SET NEW UPPER LIMIT
RET ;DONE
;Process EXE Files. SAVE file
; ROUTINE TO DUMP CORE MEMORY TO A (PREALLOCATED) FILE
COMMENT \
SUPPORTING CHARACTERS:
Q1 STARTING PAGE OF A SET (PROCESS PAGE #)
Q2 NUMBER OF PAGES IN A SET
Q3 EXE DIRECTORY PAGE FIELD POINTER
P1 VIRTUAL ADDRESS ON PAGE TO BE DUMPED
(PG # *1000 +777)
P2 STARTING PAGE OF A SET (FILE PAGE #)
P4 ADDRESS ON PAGE TO BE DUMPED
(PG # *1000 +777)
\
SAVE: MOVEI Q2,[ASCIZ/[BOOT: DUMPING] /]
CALL OUTSTR ;...
SETZM P2,A%FP0 ;SET UP TO CLEAR EXE DIRECTORY
MOVE T1,[A%FP0,,A%FP0+1] ;PREPARE TO CLEAR EXE DIRECTORY PAGE
BLT T1,A%FP0+777 ;ZERO EXE FILE DIRECTORY PAGE
MOVEI P2,2 ;GET INITIAL FILE PAGE #
SETZB Q1,Q2 ;CLEAR START PAGE #, # OF PAGES IN SET
SETOI P1, ;INITIALIZE FIRST VIRTUAL ADDRESS
TXNE F,F.DUMP ;DUMP REQUESTED ?
TXO F,F.PHYS ;YES, USE PHYSICAL ADDRESSES
MOVEI Q3,A%FP0+1 ;INITIALIZE DIRECTORY ADDRESS
SETZM PGCNT ;ZERO COUNT OF DISK PAGES WRITTEN
TXZ F,F.DPER+F.IOER ;RESET FLAGS
;HERE TO SELECT CANDIDATE FOR NEXT PAGE SAVE
SAV.NP: ADDI P1,1000 ;COMPUTE NEXT VIRTUAL ADDRESS
TXNN F,F.PHYS ;DOING A DUMP OF PHYSICAL PAGES?
TLNN P1,-1 ;NO, END OF VIRTUAL PAGES?
SKIPA P4,P1 ;NO, GET PAGE NUMBER TO BE DUMPED
JRST SAV.DN ;AT END OF VIRTUAL CORE, GO WRITE DIR
CAMLE P1,[PHYADR+777] ;AT END OF PHYSICAL CORE?
JRST SAV.DN ;YES, GO WRITE DIRECTORY
CALL TSTADR ;IS THIS ADDRSS LEGAL ?
;HERE IF PAGE-FAIL, NXM, VBOOT PAGE, OR PAGE OUTSIDE DUMP RANGE
; SPECIFIED BY USER
JRST [ CAML P4,TOPBAS ;ARE WE WHERE BOOT NOW IS?
CAMLE P4,TOPTOP ;ARE WE IN RANGE?
JRST SAV.NS ;NO, GO ON TO NEXT PAGE SET
JRST SAV.NQ] ;PAGE OK, SO WRITE THE SAVED DATA
; TSTADR FAILED BECAUSE IT WAS A VBOOT PAGE -
; GO PLAY MAPPING GAMES
MOVE T1,P2 ;LEGAL PAGE - GET START FILE PAGE # OF SET
ADD T1,Q2 ;COMPUTE CURRENT FILE PAGE #
LDB P4,[POINT 18,T1,26] ;GET FILE PAGE NUMBER
JUMPE P4,SAV.NQ ;ZERO IS ALWAYS SET UP CORRECTLY
SKIPGE XBNUM ;IF SHORT FILE, THEN CANNOT GO FURTHER
JRST SAV.NS
CAMN P4,XBNUM ;IS THIS PAGE PART OF THE MAPPED XB?
JRST SAV.NQ ;YES, XB IS SET UP ALREADY
;HERE TO GET NEXT INDEX BLOCK FOR DUMP FILE
LOAD P5,IDXADR,A%SXB(P4) ;GET ADR OF NEXT XB
JUMPE P5,SAV.NS ;IF NONE, STEP TO NEXT SET
MOVEM P4,XBNUM ;SAVE THE XB NUMBER OF MAPPED XB
MOVEI P4,A%XB ;AND GO READ IN NEW XB
PUSH P,F ;SAVE STATE OF FLAGS
TXZ F,F.PHYS ;DO A VIRTUAL READ
CALL REDPAG
$ERROR (IOER3) ;ERROR READING PAGE
POP P,F ;RESTORE FLAGS
;HERE TO CALCULATE INDEX-BLOCK INDEX FOR PAGE TO BE DUMPED
SAV.NQ: MOVE T1,P2 ;YES, GET START FILE PAGE # OF SET
ADD T1,Q2 ;COMPUTE CURRENT FILE PAGE #
IDIVI T1,1000 ;GET ADR WITHIN THIS XB
; XB INDEX NOW IN T2
MOVE P4,P1 ;GET BACK THE PAGE TO BE WRITTEN
;THIS SECTION PLAYS MAPPING GAMES. BOOT LANDED IN LOW CORE AND MOVED ITSELF.
;WHILE MOVING ITSELF TO HIGH CORE IT SAVED THE HIGH CORE DATA IN THE AREA IT
;LANDED IN. NOW WE ARE WRITING A DUMP FILE. THE AREA WHERE BOOT LANDED
;(WHICH NOW HOLDS SAVED HIGH CORE INFORMATION) WILL NOT BE WRITTEN INTO A DUMP
;FILE. INSTEAD THE LOW CORE AREA WILL BE WRITTEN OUT IN IT'S "VIRTUAL" HIGH
;CORE ADDRESS.
;HERE TO SEE IF:
; (1) MICROCODE PAGE - DON'T DUMP IT
; (2) TARGET PAGE - WRITE PAGE SAVED IN SOURCE AREA
CAML P4,LODBAS ;ARE WE IN SOURCE AREA? (SEE DIAGRAMS)
CAMLE P4,LODTOP ;ARE WE IN RANGE?
SKIPA ;NO - CONTINUE NORMALLY
JRST SAV.NS ;YES - SKIP THIS PAGE
CAML P4,MCSPAG ;ARE WE IN MICROCODE PAGES
CAMLE P4,MCEPAG ;ARE WE IN RANGE
SKIPA ;NO - CONTINUE NORMALLY
JRST SAV.NS ;YES - SKIP THIS PAGE
CAML P4,TOPBAS ;ARE WE WHERE BOOT NOW IS? (TARGET AREA)
CAMLE P4,TOPTOP ;ARE WE IN RANGE?
SKIPA ;NO - CONTINUE NORMALLY
;HERE TO SET POINTERS TO HIGH-CORE PAGES WE RELOCATED TO SOURCE AREA
JRST [ SUB P4,TOPBAS ;YES - COMPUTE PAGE NUMBER WITHIN AREA
ADD P4,LODBAS ;ADDRESS OF WHERE SAVED DATA LIVES
JRST .+1] ;SAVE THE PAGE HERE
;HERE TO WRITE THE MEMORY PAGE TO DISK
AOS T1,PGCNT ;COUNT TOTAL PAGES WRITTEN TO DISK (INCLUDING
; THIS ONE
CAMGE T1,DEXEPC ;IS THERE ROOM FOR THIS PAGE (+ 1 DIR PAGE)?
JRST DMPOK ;YES
TXO F,F.DPER ;NO, SET DUMP ERROR FLAG
JRST SAV.NS ;GO UPDATE DIRECTORY PAGE AND EXIT
DMPOK: LOAD P5,IDXADR,A%XB(T2) ;GET DISK ADDRESS
JUMPE P5,SAV.NS ;NO DISK ADDRESS, START NEW PAGE SET
CALL WRTPAG ;WRITE THE DATA PAGE
TXO F,F.IOER ;MARK THAT AN ERROR OCCURED
AOS Q2 ;COUNT UP THE PAGES WRITTEN
;LIMIT TESTING - SEE IF WE NEED TO START A NEW PAGE SET
LIMTST: CAML P1,[PHYADR+777] ;HAVE WE JUST WRITTEN PHYPAG?
JRST SAV.N1 ;YES, GO FINISH CURRENT PAGE SET
MOVE T1,P1 ;GET ADDR OF PAGE WE JUST DUMPED
ADDI T1,1000 ;INCREMENT FOR PROPER VALUE
; (CONSIDER NEXT PAGE)
TRZ T1,777 ;GET PAGE BOUNDARY
JUMPLE T1,LIM1 ;SKIP THIS TEST FIRST TIME THROUGH
IDIV T1,[1000000] ;SEE IF PAGE FALLS ON A SECTION BOUNDARY
JUMPE T2,SAV.N1 ;IT DOES, SO FORCE A NEW PAGE SET
LIM1: CAIGE Q2,1000 ;REACHED THE END OF A SECTION?
JRST SAV.NP ;NO
;HERE TO START NEW PAGE SET
SAV.NS: JUMPE Q2,SAV.ES ;GO UPDATE START PAGE # IF NULL PAGE SET
CAIGE Q2,1000 ;EARLY QUITTING? (LESS THAN FULL PAGE SET?)
SUBI P1,1000 ;YES MUST RETEST THIS PAGE
SAV.N1: CAILE Q3,A%FP0+777-.DISIZ-.EBSIZ-.VBSIZ+1 ;DIRECTORY TOO BIG ?
$ERROR (FILDRP) ;YES, IT'S GREATER THAN 1 PAGE
MOVEI T1,100 ;GET DI%WRT BIT, STORE IN FLAG WORD
STOR T1,DIFLG,(Q3) ;STORE FLAGS
STOR P2,DIFIL,(Q3) ;STORE STARTING FILE PAGE NUMBER
SOS Q2 ;GET CORRECT REPEAT COUNT
STOR Q2,DIRPT,(Q3) ;STORE REPEAT COUNT
STOR Q1,DIPRO,(Q3) ;STORE PROCESS PAGE #
ADDI Q3,.DISIZ ;POINT TO NEXT DESCRIPTOR
ADDI Q1,0(Q2) ;COUNT UP PROCESS PAGE #
ADDI P2,1(Q2) ;GET CORRECT NEXT FILE PAGE #
SAV.ES: SETZM Q2 ;RESET SIZE OF PAGE SET
TXNN F,F.DPER ;DUMP ERROR OCCURRED?
AOJA Q1,SAV.NP ;NO, GO WRITE NEXT PAGE SET
;YES, WRITE DIRECTORY PAGE
SAV.DN: MOVEI T1,.EXDIR ;GET DIRECTORY BLOCK TYPE
STOR T1,DIDIR ;STORE IN EXE DIRECTORY
MOVEI T1,-A%FP0(Q3) ;GET SIZE OF EXE DIRECTORY
STOR T1,DISIZ ;STORE SIZE OF DIRECTORY BLOCK
MOVEI T1,.EXENT ;GET ENTRY VECTOR BLOCK TYPE
STOR T1,VBTYP,(Q3) ;PUT BLOCK TYPE IN ENTRY VECTOR BLOCK
MOVEI T1,.VBSIZ ;GET SIZE OF ENTRY VECTOR BLOCK
STOR T1,VBSIZ,(Q3) ;STORE SIZE OF ENTRY VECTOR BLOCK
MOVEI T1,EVLEN ;GET LENGTH OF ENTRY VECTOR
STOR T1,VBCNT,(Q3) ;STORE LENGTH OF ENTRY VECTOR
MOVEI T1,EVADR ;GET ADDRESS OF ENTRY VECTOR
STOR T1,VBADR,(Q3) ;STORE ADDRESS OF ENTRY VECTOR
ADDI Q3,.VBSIZ ;POINT TO NEXT BLOCK IN EXE DIRECTORY
MOVEI T1,.EXEND ;GET END BLOCK TYPE CODE
STOR T1,EBTYP,(Q3) ;STORE BLOCK TYPE IN END BLOCK
MOVEI T1,.EBSIZ ;GET SIZE OF END BLOCK
STOR T1,EBSIZ,(Q3) ;STORE SIZE OF END BLOCK
TXZ F,F.PHYS ;TURN OFF PHYSICAL ADDRESSES
SKIPG XBNUM ;DO WE HAVE XB 0 MAPPED IN
JRST SAV.D1 ;YES
LOAD P5,IDXADR,A%SXB+0 ;NO, GO MAP IT IN
MOVEI P4,A%XB ;READ INTO XB PAGE
CALL REDPAG
$ERROR (IOER3) ;ERROR READING PAGE
SAV.D1: LOAD P5,IDXADR,A%XB+0 ;WRITE OUT PAGE 0 OF FILE
SKIPN P5 ;COMPLAIN IF NO PAGE ZERO
$ERROR (FILNEF) ;IF NO PAGE 0, COMPLAIN
MOVEI P4,A%FP0 ;GET CORE ADDRESS OF EXE DIRECTORY
CALL WRTPAG ;WRITE DIRECTORY PAGE AND RETURN
$ERROR (IOER9) ;COULDN'T WRITE IT
TXZE F,F.IOER ;DID A WRITE ERROR OCCUR?
$ERROR (IOER8) ;YES
TXZE F,F.DPER ;DUMP ERROR?
$ERROR (DMPFTS) ;YES - DUMP.EXE TOO SHORT
MOVEI Q2,[ASCIZ/[OK]
/]
CALL OUTSTR
RET ;ALL DONE
>;IFN FT.EXE
;Cleanup at end of program
LIT
IFG <A%VORG-.>,<BLOCK <A%VORG-.>>
BLOCK <777-<.&777>>
JRST VBOOT ;MUST BE LAST INSTRUCTION IN LAST PAGE
IFG <.-A%VORG-1000>,<PRINTX ?MAXIMUM CODE SIZE EXCEEDED>
DEPHASE
CODEND:
BOTMOV: MOVE P5,(P3) ;GET NONBOOT WORD
EXCH P5,(P2) ;EXCHANGE WITH BOOT
MOVEM P5,(P3) ;BOOT INTO HIGH CORE
AOS P2 ;NEXT WORD
AOS P3 ;...
SOJG P4,T1 ;DO ALL WORDS
MOVEND: JRST <CORMVD-ENT>+<A%CODE-1000-A%VORG>(P1) ;GO TO MOVED BOOT
;PAGE FAULT HANDLER UNTIL AFTER BOOT IS MOVED
PAGTRP: AOS CODEND-ENT+UPTPFO(16) ;THE PC OF THE PAGE FAIL
JRST @CODEND-ENT+UPTPFO(16) ;PROCEED
>;END IFN FT.PRT&2
IFN FT.PRT&1,<END JRST ENT> ;GIVE START ADR IF ASSEMBLED PT 1
BLOCK <777-<.&777>>
END