Function of the card:
10-way logic block low speed without loads
SDTDL 10-way logic block low speed without loads
10-Way Logic Block Low Speed without Loads
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: 370374
PCB number: 484077
Used in: IBM 1410, IBM 1311 Disk, IBM 1401
Cap code: None (details)
IBM 1311 ILD, p125
1410_SMS_VOL_1.pdf, p98
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.