Question 1

Where do I get DOS game zips?

Accepted Answer

Public-domain and shareware DOS games are widely hosted on the Internet Archive (archive.org). The advanced 'Add a custom game' panel accepts an Internet Archive item URL or a local .zip from disk. The boot EXE is auto-detected; complex setups can include a .jsdos/dosbox.conf override.

Question 2

What is an Internet Archive URL?

Accepted Answer

A page like archive.org/details/msdos_X — the page that hosts a single DOS game item. Paste that URL and the player downloads the zip directly. CORS is handled by a static CORS proxy with circuit-breaker fallback.

Question 3

Are saves persistent?

Accepted Answer

Yes. The DOSBox-x runtime persists save files into IndexedDB scoped to the game zip's hash. Closing the tab or rebooting your computer doesn't lose them; clearing site data does.

Question 4

What engine powers this?

Accepted Answer

js-dos v8 — open-source DOSBox-x compiled to WebAssembly with a JavaScript host. Pinned to v8.3.20; the matching emulators package is 8.3.8.

Question 5

What games actually work?

Accepted Answer

Most CGA / EGA / VGA single-player MS-DOS games run cleanly. Games that require specific sound cards (Sound Blaster, AdLib) usually work; games that depend on raw CD-ROM audio or proprietary copy protection may not. Modern Win-DOS hybrids (early Windows 9x titles) are out of scope.

Question 6

Can I run Windows or Steam .exe demos?

Accepted Answer

No. This player is DOSBox for classic MS-DOS games only (Doom, Commander Keen, Civilization, etc.). Windows and Steam .exe demos are modern Win32/64 programs and cannot run here. Drop an MS-DOS game .zip — not a Windows installer or Steam demo.

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