| [[Clock Signal|Clock Signal]]
| [https://github.com/TomHarte/CLK/releases]
| ❌
| May 15, 2023
| [[CPC old generation|CPC range]], [[ZX Spectrum]], [[Enterprise]], [[Acorn Electron]], [[Apple II]], [[Oric 1/Atmos]], [[VIC-20]], [[ZX80/81]], [[Atari 2600]], [[Atari ST]], [[Macintosh]], [[MSX]], [[ColecoVision]]