Function of the card:
10 Way Logic Block Low Speed with Loads
10 way logic block low speed with load
SDTDL 10 way log blk low sp w load
SDTDL 10-way logic block low speed with load
Listed in 1401 SMS card usage
Saturated Drift Transistor Diode Logic (SDTDL) is a form of Diode-transistor logic using faster drift-field transistors.
Part number: 370373
Customer Eng reference number: 729919
PCB number: 484077
Used in: IBM 1410, IBM 1311 Disk, IBM 1401, IBM 2821 Control Unit
Cap code: None (details)
2_2 SMS Cards, p92
IBM 1311 ILD, p124
1410_SMS_VOL_1.pdf, p97
Coslet data
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.