COMMENT ⊗   VALID 00002 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	When working on an IO Bus device, you should:
C00003 ENDMK
C⊗;
When working on an IO Bus device, you should:
  1) Halt the computer
  2) POWER DOWN THE DEVICE (this keeps the frying of circuits to a minimum)
  3) unplug the device, or cable, or whatever
  4) Do what you must
  5) Undo steps 3:1, in reverse order
  6) If the system is running, you might have to go into DDT and CONO the
     device PIA assignments back to what they should be(!).  The system
     can get very confused (read wedged) if a device interrupts in the
     wrong channel.