Tardis DOS v0.1.48

Tardis DOS is a ROM-resident command shell for the Commodore 64 that replaces the stock BASIC + KERNAL with a modern command line. It runs from a OneROM — a flash ROM-replacement chip that drops into the C64's KERNAL/BASIC ROM sockets; larger commands stream in from it as overlays on demand, so the shell does far more than its 16K — bigger on the inside, like the Doctor's TARDIS.

Download

c64-tardis-dos-v0.1.48-for-onerom-fire-24-e.bin — flash to a OneROM (fire-24-e board).

This is the stock-fallback firmware: it carries the shell plus genuine C64 ROMs as a second bank, so run (and cartridge insert) swap in the real ROMs to launch legacy software, and font live-switches the character set + keyboard (English / Swedish).

Highlights

• Command-line shell with line editing, command history, and colour config
• Epyx-compatible fast loader — pairs with the Meatloaf, also works with 1541 / SD2IEC / Pi1541 / 1541U
• Disk tools (ls, dir, cd, cp, mv, rm, cat, less, status), a nano-style text editor, peek/poke
• Persistent settings (colours, history, font) in OneROM NV flash
• run hands off to the stock ROMs to launch BASIC / ML programs and cartridges

Notes

• Built and tested on PAL hardware. NTSC should run fine for everything except possibly the timed Epyx fast loader (calibrated on PAL); standard load is unaffected.
• The firmware embeds genuine Commodore C64 BASIC/KERNAL/character ROMs as the stock fallback bank.

Made by Mathias Malmqvist with Claude Code, 2026.