Function of the card:
SDTDL 2-way logic block low speed without loads
SDTDL-2 Way Logic Block Low Speed without Loads
SDTDL 2 way logic blk low sp w/o lds
4-2 way-no load
Listed in 1401 SMS card usage
Exists in SLT version.
Part number: 370379
SLT modules: 2399110
Customer Eng reference number: 729914
PCB number: 484027
Used in: IBM 1401, IBM 1410, IBM 2821 Control Unit, IBM 1311 Disk, IBM 1443 Printer
Image courtesy of Henk Stegeman
Image courtesy of Roberto Gonzalez Rocha
Coslet data
IBM 1443 ALD, p95
1410_SMS_VOL_1.pdf, p103
2_2 SMS Cards, pp84,85
IBM 2821 CCD, p51
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.