Function of the card:
SDTDL- R and W Reg Bit Pos
SDTDL r and w reg bit pos
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: 370351
PCB number: 484125
Cap code: None (details)
1410_SMS_VOL_1.pdf, p90
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.