This is a list of parts required for the keyboard serializers:

--------------------
>(whatever vendor seems to have
>a good supply of TTL in stock)
 2	7400	Quad NAND gate		All TTL can be either 7400 or 74LS00 series
 1	7402	Quad NOR gate		Any reputable mfr will do (T.I., National
 1	7404	Hex inverter		Semi, Signetics, etc)
 1	7474	Dual D-type flip flop
 2	74157	Quad 1 of 2 selector
 1	74175	Quad D-type latch
 2	74161	Synchronous counter

-------------------- The following probably from James Electronics
*James Electronics	(9) 592-8097
>1020 Howard Avenue
>San Carlos, CA 94070
 2	4N25	Opto-isolators (prob Motorola)	Many equivalents accepted
 1	CY3.57	3.579545 MHz crystal	pigtail leads (or supplied with PC board
					socket)
 8	1N3600	SS Diode, 		Need > 30 mA, > 30V PIV, substitutes okay
 4	1N5245	15 V Zener diodes,500mW	Between 15 and 25 V acceptable, any power
					rating greater than 500mW.
 1	1N4735	6.2V Zener diode,1W
 2	450 OHM 1/4 watt, 5% tolerance
 4	380 OHM
 1	220 OHM
 1	1 K OHM
 4		.1mf 50v disk ceramic decoupling capacitors
 1		10 mf 20 volt electrolytic capacitor ( > 10mf and/or 20volts is fine)

--------------------
*Kierulff Elect.	(9) 968-6292
>3969 E. Bayshore Rd
>Palo Alto, Calif. 94303
 2		Cinch 5024A30 12-pin dual readout edge connector (or equiv)
 1		Augat 40 pin IC socket, solder pin (hamilton/avnet or kierulff)

-------------------- Diplomat
*Diplomat		(56) 734-1900
>1283 F Mountain View Alviso Rd
>Sunnyvale, CA 94086
 1	TR1863(A or B)	Western Digital UART	In stock at Diplomat

Ewin Foley  - reps