Function of the card:
Core matrix card
Part number: 373432
Customer Eng reference number: 822938
PCB number: 490322 , hole pattern: 748515
Used in: IBM 2821 Control Unit
IBM 2821 CCD, pp107,108,109
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.