163-II (NORD-1 card)

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163 I/O output and clock, is a card that is used in the NORD-1 CPU.

File:NORD-1 card 163-c.jpg
Component side.
File:NORD-1 card 163-s.jpg
Solder side.

Introduction

The card is made in the standard NORD-1 card format.

CPU model Crate position
29 D20
35 D20

The logic diagram is documented in drawing 2A63.[1]

Switches and indicators

There seems to be a way to select between 100 Hz, 50 Hz, 25 Hz and 12.5 Hz interrupt from the real time clock.

BOM

This list contains the logic circuits used, passive components are not listed.

  • 3 x 7400
  • 1 x 7401
  • 2 x 7402
  • 6 x 7404
  • 1 x 7413
  • 2 x 7420
  • 1 x 7453
  • 4 x 7474

Reference

  1. ↑ HARDWARE MANUAL NORD 1
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