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CYBER.XPO.95 (Arsenal Computer).ISO
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1980-01-03
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Parts list for one megabyte memory board with clock
Chips
2 74LS00 B5, B6
2 74LS04 A6, B3
2 74LS10 A4, B1
2 74LS20 A2, A7
2 74LS74 A3, B4
1 74HC74 A8
1 74125 D4
1 74LS138 A1
5 74LS153 C1, C2, C3, C4, C5 (May be 74LS253)
1 74LS175 A5
2 74LS393 B2, C6
2 74HC244 D3, D5 (May be Am2966, NOT 74LS244)
3 74LS245 B8, D1, D7
1 MC146818 C8
32 Rams E1 thru H8 (May be any 256k by 1 dynamic ram at 200ns
or faster access time. I have tried
several brands, both CMOS and NMOS, with
no problems.)
Capacitors
48 0.1 uf ceramic cap 12v or higher (bypass caps at each chip, not on schem.
2 1.0 uf ceramic or tantalum, 12v or higher
1 10 pf NP0 ceramic or mica
1 4-20 pf variable (substitute any cap that covers 7-15 pf range)
Diodes
5 1N4148, 1N914 or equivalent
Resistors all 1/4 watt 5% film
1 560 ohm
1 100k
1 390k
1 22M if not available substitute 10M
Crystal
32768 Hz watch crystal
Battery
4 Nicad cells with holder. Either A or C size is ok.
Sockets
14 14 pin wire wrap sockets. I substituted 16 pin for a price break.
39 16 pin wire wrap sockets.
5 20 pin wire wrap sockets.
1 24 pin .6 in spacing wire wrap socket.