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

Function of the card:
DDTL-DL7, Lower Power Inverter
DL7, Low Power Inverters

Part number: 372102

Used in: IBM 1410, 7040

IBM SMS card type DPD 372102 IBM SMS card type DPD 372102

Image courtesy of Ron Hashiro

References: National Museum of Computing.
1410_SMS_VOL_2.pdf, p125
This page created by Ken Shirriff on Wed Sep 15 18:15:09 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.