125 (NORD-1 card)

125 Shift counter, is a card that is used in the NORD-1 CPU.

Component side.

Solder side.

This counter keeps track of the number of bits to shift in a shift instruction.

Introduction

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

CPU model	Crate position
29	D01
35	D01

The logic diagram is documented in drawing 2A25.

Switches and indicators

There are no switches or indicators on this board.

BOM

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

• 7 x 7400
• 3 x 7402
• 1 x 7410
• 1 x 7420
• 1 x 7430
• 4 x 7450
• 7 x 7472
• 1 x 7473

Reference

• Hardware in NORD-1 Serial 47