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

Function of the card:
4-3 way -a-o wo/load h.s.
4-3 way (-a, -o) wo/load h.s.

Part number: 372527

Customer Eng reference number: 734377

Used in: IBM 2821 Control Unit, IBM 1311 Disk

IBM SMS card type DKX 372527 IBM SMS card type DKX 372527

References: IBM 1311 ILD, p155
IBM 2821 CCD, p78
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, 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.