195 (NORD-1 card)
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195 Duplex Start-stop buffer, is a card that is used in the NORD-1 CPU.
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
- Hardware in NORD-1 Serial 47