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CydandClaude Fable 5 a0a4260fd4 Sound: dual-AWE32 EMU8000 emulation -- the pod has audio

Vendored 86Box EMU8000 core (GPL-2, emu8k.cpp/.h + shim) plus vweawe.cpp:
two cards at the production addresses (0x620/0x640 register triplets),
rear-card DSP/mixer stub at 0x240, synthesis on an autonomous render
thread with direct winmm output so sustained voices ride through
emulation-thread stalls (RIO staging retries) like the real silicon did.
WC sample-counter interpolation between render chunks keeps HMI SOS
busy-waits fast. VWE_AWE32/VWE_AWE_ROM/VWE_AWE_RAM_KB/VWE_AWE_SHIFT/
VWE_AWE_LEAD_MS/VWE_AWE_DUMP/VWE_AWE_LOG env knobs.

emulator/roms: the AWE32 1MGM GM ROM dumped from our own pod card (SF2)
plus the reconstructed raw image the emulated EMU8000 loads. The HMI
driver refuses the AUDIO*.RES SoundFont upload without it (banks declare
irom=1MGM) -- that was the root cause of the first silent runs; full
debug chain in SOUND-NOTES.md. Repo serves the pod-owner community only.

.gitignore: drop the ROM excludes and un-ignore ALPHA_1/ and sda4/
(committed separately).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-07-04 19:40:15 -05:00

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VPX + AWE32 devices — DOSBox-X integration

Our original source for the emulated pod hardware. Kept here under version control because the DOSBox-X source tree itself (emulator/src/, ~490 MB) is git-ignored.

vpxlog.cpp — the Division VPX link adapter (INMOS C012 at I/O base 0x150), grown through Phase 3: iserver handshake responder, FIFO scene decode, GL Division renderer (gallery shading model), VDB video-head splitter windows.
vweawe.cpp — the dual-AWE32 sound device: two vendored EMU8000 cores at 0x620/0x640 (+0x400/+0x800 triplets), rear-card DSP/mixer stub at 0x240, autonomous render thread with direct winmm output. Needs the GM ROM (emulator/roms/awe32.raw) via VWE_AWE_ROM or SoundFont uploads are refused (banks declare irom=1MGM). See emulator/SOUND-NOTES.md.
emu8k.cpp / emu8k.h / emu8k_shim.h — EMU8000 wavetable core vendored from 86Box (GPL-2.0-or-later, same license as DOSBox-X), with a minimal shim; local changes are listed in the emu8k.cpp header.

Applying to a DOSBox-X source checkout

Tested against DOSBox-X v2026.06.02, MSYS2 mingw64.

Copy the devices in:

cp emulator/vpx-device/vpxlog.cpp   emulator/src/src/hardware/
cp emulator/vpx-device/emu8k.cpp    emulator/src/src/hardware/
cp emulator/vpx-device/emu8k.h      emulator/src/src/hardware/
cp emulator/vpx-device/emu8k_shim.h emulator/src/src/hardware/
cp emulator/vpx-device/vweawe.cpp   emulator/src/src/hardware/

Add them to the hardware build — in src/src/hardware/Makefile.am, append vpxlog.cpp emu8k.cpp vweawe.cpp to libhardware_a_SOURCES (we inserted them after glide.cpp; if you edit the generated Makefile/Makefile.in by hand instead of re-running automake, also mirror the $(OBJEXT) list, the .Po depfile list, and the depfile include markers — grep for how vpxlog appears and copy the pattern).
Call the inits — in src/src/gui/sdlmain.cpp, declare void VPXLOG_Init(); and void VWEAWE_Init(); next to the other *_Init() prototypes; call VPXLOG_Init(); right after GLIDE_Init(); and VWEAWE_Init(); right after SBLASTER_Init(); (it needs the mixer initialized).

Build:

cd emulator/src
./build-mingw-sdl2 --enable-debug=heavy

Output: src/src/dosbox-x.exe.

Running

set VPXLOG=C:\VWE\TeslaRel410\emulator\vpxlog.txt
emulator\src\src\dosbox-x.exe -conf emulator\capture.conf
python emulator\analyze_capture.py

With VPXLOG unset the device is inert and the build behaves like stock DOSBox-X.

2.5 KiB Raw Blame History

VPX + AWE32 devices — DOSBox-X integration

Applying to a DOSBox-X source checkout

Running

2.5 KiB

Raw Blame History