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Signal names for SN74S262 pins, from RML 380Z service manual

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Ben Harris 2025-01-01 23:54:11 +00:00
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@ -291,12 +291,26 @@ available for emulators.
Also some real screenshots; e.g. https://www.youtube.com/watch?v=Jy6tQsyd4ho
I haven't found a datasheet for the SN74S262/3, but the schematic in the
ABC80 service manual provides a pinout:
I haven't found a datasheet for the SN74S262/3, but the schematics in the
ABC80 and RML 380Z service manuals provides a pinout:
4-7: row address 0-3
8,9,11-13: data 0-4
16-19,1-3: character address 0-6
20: Vcc
1: D4
2: D5
3: D6
4: RA (row address)
5: RB
6: RC
7: RD
8: Y1 (output)
9: Y2
10: Gnd
14,15: "two chip enables" (Gnd on ABC80)
11: Y3
12: Y4
13: Y5
14: CS*
15: CS*
16: D0 (character address)
17: D1
18: D2
19: D3
20: Vcc