One ROM

Description

One ROM was created by Piers Finlayson and is the most flexible ROM replacement for retro computers. The “Fire” version is powered by an RP2350 microcontroller and can be programmed via a USB port from the command line, web browser, or with a downloadable GUI studio.

Visit the One ROM website or GitHUB project for more detailed information. Get support in the Discord channel!

One ROM emulates the 24, 28, 32 and 40 pin EPROMs and mask programmed ROMs used in nearly every computer-based system from the late 1970s through to the early 1990s.

ROM types replaced:

24 pin: 2704, 2708, 2716, 2732, 2316, 2332, 2364
28 pin: 27×64, 27×128, 27×256, 27×512, 23128, 23256, 23512, 231024, TCS531000
32 pin: 27C010, 27C020, 27C040, 27C301, SST39SF010, SST39SF020 (not yet available in my store)
40 pin: 27C400

Supported and tested systems include the Commodore 64, VIC-20, PET, 1541 disk drives, Atari 800XL, TI-99, CoCo2, BBC Micro and Master, PC XT, Amiga, arcade systems, and many, many more.

With One ROM you only need a single hardware variant to replace all ROM types with that pin count – 24, 28, 32 or 40 pin. All of the different ROM types are configurable, including the mask programmed chip select behaviour. This means that whatever your system, One ROM has you covered.