Dave5

I’ve seen a couple of these projects¹… just bonkers. Decoding the contents of a ROM by looking at the physical structure.

The TMS0801, from 1972, was one of the first chips to completely contain everything to need to run a calculator. It was used to power the Sinclair Cambridge.

It contained the CPU, RAM, and ROM, all on one chip.

Inspired by Ken Shirriff reading from a similar chip, I decided to try and see I can read the ROM data by simply looking at a photo of the chip.¹

https://github.com/veniamin-ilmer/decoding_rom HT: https://hackaday.com/2024/01/12/decoding-a-rom-from-a-picture-of-the-chip/

1. This is really good one: https://www.righto.com/2021/11/reverse-engineering-yamaha-dx7.html ↩︎
2. Emph mine ↩︎