Additional Pictures 


The DCM-50A Platform with the REGENCY 501-374 marked TMS1116NL single-chip calculator circuit from an ACT-T16k Radio Scanner manufactured in September 1977.

Close-up view of the TMS1116NL single-chip calculator circuit.

Close-up view of the National Semiconductor NSA576 Light-Emitting-Diode (LED) display module.

If you have additions to the above article please email:

Joerg Woerner, September 4, 2023. No reprints without written permission.