This page describes the IBM SMS card "YAR", and is part of the SMS card database.

Function of the card:
Cf diode card
CF Diode Card

Octal Common Cathode Diode Package

Part number: 370321

Used in: 1622, IBM 1620

Cap code: None (details)

Symbol: DIODE CARD

Pinout:

A D1
B D2
C D3
D D4
E D5
F D6
G D7
H D8
J
K
L
M
N COMMON
P
Q
R
References: IBM 1620 FE Catalog
IBM 1620 Instructional System Diagrams, p498
Coslet data

The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.