Function of the card:
Buffer Memory Card
Buffer memory card
Part number: 373330
Customer Eng reference number: 734416
PCB number: 395643 , hole pattern: 490252
Image courtesy of maisorbus
Image courtesy of Roberto Gonzalez Rocha
Image courtesy of Henk Stegeman
National Museum of Computing.
IBM 2821 CCD, p67
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.