195 (NORD-1 card)

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195 Duplex Start-stop buffer, is a card that is used in the NORD-1 CPU.

Component side.
Solder side.

Introduction

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

This card was found in the NORD-1 Serial 47 computer at crate position D30 where normally a 170 duplex buffer card is found.

The card in the NORD-1 serial 47 computer have a serial number of 4 so this is probably a quite late development board for the NORD-1.

No drawings available at the moment.

Switches and indicators

There is a strap field at D14 on this board. There is also a trimmer accessible from the card edge. The function is still unknown.

BOM

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

  • 4 x 7400
  • 3 x 7401
  • 1 x 7402
  • 1 x 7404
  • 1 x 7413
  • 1 x 7440
  • 2 x 7474
  • 8 x 74161
  • 1 x 74164
  • 1 x 74165

Reference

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