Forty years ago, before internet forums, there were user group newsletters. The TI programmable calculator hackers would write about their discoveries concerning internal workings of those little machines, particularly the SR-52, SR-56, TI-58, and TI-59.
The TI-57 and lesser models were more mass-market and had more closed architectures, most being single-chip designs. They got little attention in those newsletters.
But in the spirit of those hackers of yore, I probed the mysteries of those compact machines and wrote a few articles about them. RSKEY has graciously hosted them here:
https://www.rskey.org/CMS/the-library
The TI-57 and lesser models were more mass-market and had more closed architectures, most being single-chip designs. They got little attention in those newsletters.
But in the spirit of those hackers of yore, I probed the mysteries of those compact machines and wrote a few articles about them. RSKEY has graciously hosted them here:
https://www.rskey.org/CMS/the-library