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

Function of the card:
SDTDL 4 2 way n and log blks w/o lds
4-2 way-no ld-h.s.

Exists in SLT version.

Saturated Drift Transistor Diode Logic (SDTDL) is a form of Diode-transistor logic using faster drift-field transistors.

Part number: 372586

SLT modules: 2399110

Customer Eng reference number: 734341

Used in: IBM 1443 Printer, IBM 2821 Control Unit

IBM SMS card type ZGH 372586 IBM SMS card type ZGH 372586 IBM SMS card type ZGH 372586 IBM SMS card type ZGH 372586

References: IBM 1443 ALD, p130
IBM 2821 CCD, p112
This page created by Ken Shirriff on Wed Sep 15 18:15:10 2021.

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.