v0.1.0 - 6502 SBC Rev 2 — Breadboard to PCB

v0.1.0 Latest

Breadboard Prototype ROM

Published by Patrick on Mar 20, 2026 at 11:00 AM · 12 downloads

First working ROM image

Contains:

  • EhBASIC 2.22 configured for 65C22 VIA serial I/O
  • Simple monitor with memory examine/deposit commands
  • 19200 baud, 8N1

Known Issues

  • Cold start only (no warm start vector yet)
  • No load/save to storage

How to burn

Use a TL866II+ programmer or similar EEPROM burner. Burn to AT28C256 starting at offset 0x4000 (maps to $C000 in the memory map).