[Scott Baker] wanted to take on a new retrocomputing project. He decided to build an RC2104. Lucky for us, he documented everything along the way. In addition to the main board, [Scott] built bus monitoring and debugging tools, a front panel, a real time clock, an analog to digital converter, and a speech synthesizer.
You can follow along in the 8-part post that includes videos. He started with the basic kit:
- CPU – The Z80
- ROM – 27C512 64 KB ROM, selectable in 8KB banks
- RAM – 62256 32 KB RAM
- Clock – 7.3728 Mhz crystal that drives a 74HC04 hex inverter (for the CPU and the UART)
- Serial I/O – MC68B50 UART
In addition, he picked up a digital I/O board.