Xv6 for RISC-V

Trying to build a 6502-compatible CPU on breadboards, using as few chips as possible.

An RTL-level simulator for the Intel MCS-4 system, including the 4004 microprocessor, written in Python.

My Python Intel 4004 Emulator

Hybrid implementation, using SN74HC chips and Arduinos, of the computer described in J. Clark Scott's book "But How Do It Know?".