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

Function of the card:
Two-Way AND-Block Extender

Part number: 371236

Used in: IBM 7090, IBM 7070

Cap code: YW (details)

Symbol: E

E: Extender. Provides additional inputs to logical blocks and triggers. Adds to drivers the ability to drive more loads.
IBM SMS card type ADYW 371236 IBM SMS card type ADYW 371236

Image courtesy of Christoph Methfessel

References: IBM Standard Modular System, Component Circuits, p22
SMS Cap Code Templates & Index

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.