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  Koi-DOS 0.9 Pre-release Pre-release

  koiayame released this 2026-09-26 14:39:17 +00:00 | 1 commits to main since this release

  The first public release of Koi-DOS: a DOS-like operating system that boots on real UEFI PCs from a USB stick.

  📥 Which file do I need?

  File	For
  koi-dos-0.9.img.zip	A USB stick (real computer) or QEMU
  koi-dos-0.9.vdi.zip	VirtualBox

  Unzip first.

  🚀 Install on a USB stick

  1. Unzip koi-dos-0.9.img.zip.
  2. Write koi-dos-0.9.img to a stick with Rufus (pick DD image mode) or balenaEtcher. Everything on the stick is erased.
  3. In the firmware settings, turn off Secure Boot. UEFI boot must be on.
  4. Boot from the stick (F12, F11, F8 or Esc at power on, depends on the computer).
  5. At the Z:\> prompt, look around. To install onto a disk, type SETUP.

  ⚠️ SETUP erases the disk you choose.

  🖥️ VirtualBox

  1. Unzip koi-dos-0.9.vdi.zip.
  2. New machine: type Other, version Other/Unknown (64-bit), 2 GB RAM.
  3. System: tick Enable EFI.
  4. Storage: attach koi-dos-0.9.vdi to the SATA controller.

  ✨ What's in it

  • DOS-style shell: dir, copy, xcopy, find, sort, batch files, pipes, redirection
  • FAT32 on SATA, NVMe and USB drives, long file names
  • USB and PS/2 keyboards and mice, touchpad scrolling, EN/RU/UK/EL layouts
  • Wired Intel network and USB phone tethering, HTTP and HTTPS
  • dosget package manager with signed packages and automatic drivers
  • Sound (Intel HD Audio), picture viewer, text editor, registry
  • On the stick: Koi-Commander, games pack, dosfetch
  • Via dosget: Lua, DOOM (bring your own WAD), Quake

  🚫 Known limits

  • No Wi-Fi, no Secure Boot, no BIOS-only PCs
  • FAT32 only
  • Does not run MS-DOS programs
  • 3D graphics only on Intel HD 2000/3000 and QEMU
  • label and mode only report, they do not change anything yet

  🔒 SHA-256 (unzipped)

  ea43799a83169320596befd0ddfb7d1d08946769ba7c768bb9810cfb90963482  koi-dos-0.9.img
  a595faa13bc200df861cfeffc7c27ef4f64d3dc540a8e3793e0aaed8cb1e71d2  koi-dos-0.9.vdi
  

  Found a problem? Type log KOI.LOG and attach that file to an issue.

  Downloads

  • Source code (ZIP)
    0 downloads
  • Source code (TAR.GZ)
    0 downloads

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  • koi-dos-0.9.img.zip
    1 download · 2026-09-26 14:53:10 +00:00 · 567 KiB
  • koi-dos-0.9.vdi.zip
    0 downloads · 2026-09-26 14:53:11 +00:00 · 477 KiB