v1.2.0

What's new

Built-in editor

• This is a rust-implementation of the MS-DOS original.

Overlay support for disk images

• When mounting a readonly disk image with a write overlay, writes go to .rdelta files in 64kB blocks.
• If the base image changes lateron, the delta files are refused.
• If Rust-DOS is killed during writes, only that 64kB block is lost.

Drive selection buttons for Windows

• For windows users, choosing which disk to browse was not straightforward. They now see dedicated drive buttons.

Reboot

There's now support for the following reboot mechanisms:

• port 92h
• writing 06h/0Eh to port CF9h (new)
• INT 19h
• jumping to FFFF:0000
• a triple fault
• Ctrl+Alt+Del at the prompt (new)
• a new debug server call, POST /api/control/reboot

Automated Game Regression Test Suite

• This suite downloads approx. 19 MB of shareware and freeware and runs a test suite with various scenarios and configurations.
• Each scenario takes picture and sound hashes at fixed points and compares them against "golden" masters.
• When a hash changes, the run saves the new picture or sound next to the previously recorded one in target/game_suite/, and writes report.md.
• If changes are desired/expected, run with GAME_SUITE_BLESS=1 to re-record new hashes.

Games tested

• Early PC games: Alley Cat, Digger, Sopwith, Rogue, Scorched Earth.
• Real-mode games: Keen 1, Wolf3D, Jill (in CGA, EGA and VGA modes), Cosmo, Duke Nukum.
• Protected-mode games: Doom, Heretic, Duke3D, Descent, Raptor.

Test configurations

• CPU and core: 386, 486 and Pentium, from 300 to 80000 cycles. Pairs of scenarios run on both the interpreter and the dynamic recompiler and must give the same hashes.
• Sound: PC speaker, SB 2.0, SB Pro 2, SB16, Gravis Ultrasound, General MIDI and Disney Sound Source.
• Two linked machines: Doom over IPX, a null-modem cable and a modem call, plus Heretic over IPX. Both machines must reach the game and stay in it.

How to run

cargo test --release --test game_suite -- --ignored --nocapture

Bugfixes

• Fixed auto cycles failing to select sensible values in WASM
• Fixed GUS audio problems in Duke3D
• Fixed SB Pro / SB 2 panics due to wrongly assuming SB16 parameter support
• Fixed SB2.0 crash in Descent
• 7z was missing in the libretro supported extensions list
• Fixed Sam'n'Max startup crash with DPMI=on
• Stopped unit tests from leaving stray "layer15:" directories behind
• Fixed shell saying "Syntax error " when processing IF ERRORLEVEL == 1 GOTO END
• Added support for DOS reboot