“A register level TMS0805 CPU emulator on an Arduino Nano runs the original 320 instruction calculator program. A custom PCB houses it all.
Understanding the architecture of past, simpler CPUs is important to learn how to create future devices.
This project implements an accurate emulation of the Sinclair Scientific Calculator. Most of the display glitches are accurately duplicated. The components in this project are easily sourceable, thus it should be able to be replicated.
Special care was taken in the design of the emulator to match the execution speed of the
original calculator, which varies from acceptable to atrocious for trigonometric functions involving small angles.”