Function of the card:
SDTDL-sdtrl-multiplex interface receiver
Quad Diode Gated Inverter (NOR)
Part number: 372255
PCB number: 399523
Used in: IBM 1311 Disk
IBM 1311 ILD, p107
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.