Turning the BBC Bridge Companion into a Tetris Console with Z80 Assembly

The BBC Tetris Companion

Turning the BBC Bridge Companion into a Tetris Console with Z80 Assembly

I decided to repurpose the obscure BBC Bridge Companion, a 1985 card game console, to run a custom Tetris-like game called Bridgetris. By reverse-engineering the system's BIOS and writing code in Z80 assembly, I overcame significant technical hurdles to create a playable title on this rare hardware. This project explores the unique challenges of low-level programming on vintage systems while breathing new life into forgotten technology.

For some reason, I had it stuck in my head for decades that the piece rotation code is actually very complex and involves a lot of fiddling.
  1. qingcharles

    Crazy that this single use console was more expensive than a fully-loaded PS5 at launch, factoring in inflation.

    The hardware is great, could make some really nice 8-bit games for it.

  2. mzs

    nice series from same author:

    https://www.leadedsolder.com/2020/02/16/colecovision-diy-par...

  3. mkirsten

    What a great project! Thanks for sharing

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2026-08-07