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

Function of the card:
LS Power Trigger Twin
L.s. power trigger twin
Trigger twin card

Trigger is IBM's term for a flip flop or latch.

Part number: 373316

Customer Eng reference number: 736615

PCB number: 395613 , hole pattern: 490245

Used in: IBM 1443 Printer, IBM 2821 Control Unit

IBM SMS card type ADC 373316 IBM SMS card type ADC 373316 IBM SMS card type ADC 373316 IBM SMS card type ADC 373316

References: IBM 2821 CCD, pp15,16,17
IBM 1443 ALD, pp77,78
National Museum of Computing.
This page created by Ken Shirriff on Wed Sep 15 18:15:11 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.