As with many first-of-a-kind devices, the Texas Instruments (TI) TMS0100 calculator chip family was a narrowly defined microcontroller, mostly good for making calculators. However, the first chip in the TMS0100 family, originally called the TM1802NC and later renamed the TMS0102, incorporated everything a microcontroller requires to be a microcontroller: a CPU, RAM, ROM, and I/O.…