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SN74S262/3 pinout

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The XM11 application note mentions "two chip enables", which can only
be pins 14 and 15.
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Ben Harris 2024-12-22 00:53:37 +00:00
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@ -290,3 +290,13 @@ Swedish Z80-based computer, so there is a purported ROM of it
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:
4-7: row address 0-3
8,9,11-13: data 0-4
16-19,1-3: character address 0-6
20: Vcc
10: Gnd
14,15: "two chip enables" (Gnd on ABC80)