170 (NORD-1 card)

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170 Duplex buffer, is a card that is used in the NORD-1 CPU.

Introduction

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

CPU model Crate position
29 D30
35 D30

The logic diagram is documented in drawing 2A70.[1]

Switches and indicators

There might be a strap field and two trimmers on this board.

BOM

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

  • 6 x 7400
  • 2 x 7401
  • 3 x 7403
  • 4 x 7404
  • 1 x 7410
  • 1 x 7413
  • 1 x 7474
  • 4 x 7493
  • 2 x 7494
  • 2 x 7495
  • 1 x MC889P RTL or DTL Hex inverter made by Motorola

Reference

  1. ↑ HARDWARE MANUAL NORD 1
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