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

Function of the card:
Alloy - Drivers, Read-Write VM #2
Alloy-drivers read-write vm#2
Memory Driver
Alloy-drivers, read-write vm#2

Germanium alloy transistors were an early type of transistor, faster than the earlier grown-junction transistors.

Part number: 371795

Used in: IBM 1414 I/O Synchronizer, IBM 1410, 7030, 7040


DC: Driver Core. Same as D, with the device being driven identified as a core.

References: National Museum of Computing.
1410_SMS_VOL_2.pdf, p110
This page created by Ken Shirriff on Wed Sep 15 18:15:09 2021.

The information on these pages comes from a variety of sources, especially old IBM documents on, 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.