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 1410, IBM 1414 I/O Synchronizer, 7030, 7040

Cap code: None (details)

Symbol: DC

DC: Driver Core. Same as D, with the device being driven identified as a core.
IBM SMS card type KG 371795 IBM SMS card type KG 371795

Image courtesy of Christoph Methfessel

References: National Museum of Computing.
1410_SMS_VOL_2.pdf, p110

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.