Implementing the classic 10PRINT maze algorithm on the HP-42s calculator using RPN programming. Works on SwissMicros DM42 and Free42 emulators too.

Implementing 10PRINT on the TI-92 calculator using TI-BASIC. Also covers Python versions on the Numworks and TI-nspire calculators.

Understanding two’s complement: how computers represent negative numbers, why it simplifies hardware design, and how to work with signed integers in assembly and high-level languages.

Writing a y^x exponent program for the HP-16C calculator, which curiously lacks scientific functions. Building a kit clone and programming in RPN.