Function of the card:
SDTDL-four 2 way n and logic blocks with loads
2 way -a hs
SDTDL-Four 2 Way N And Logic Blocks with Loads
SDTDL - four 2 way n and logic blocks with 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: 370216
Customer Eng reference number: 729906
PCB number: 399585
Used in: IBM 1410, IBM 1311 Disk, IBM 1401, IBM 1443 Printer
Cap code: None (details)
IBM 1311 ILD, p112
2_2 SMS Cards, p72
IBM 1443 ALD, p89
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.