Dumping TMS 1000 Family Firmware with the Test Mode

[LambdaMikel]

A little know procedure for dumping the firmware of old TMS 1000 family devices. Here, applied to the Science Fair Microcomputer Trainer:

Dumping TMS 1100 Firmware (Hackaday)

Inferring obfuscated ROM code on the TMS 1100 (Hackaday)

I have successfully applied the procedure to the TMS 1600 (Busch Microtronic Computer):