Changelog
All notable changes to this project will be documented in this file.
The format is based on Keep a Changelog,
and this project adheres to Semantic Versioning.
1.0.0-beta.6 - 2026-06-16
✨ New Features
3869f9e- change /FIXTC from siwtch to threshold in Hz. (merge 7f6ea67). (commit by @crazii)c2aeb80- swap stereo (left/right channel), build swtich, no runtime option. (merge 26c6a4f & f5c0616) (commit by @crazii)85fc657- improve mixing and SF/OPL volume balancing. (merge c9172d0). (commit by @crazii)95c1da4- [EXPERIMENTAL] enable IF on feeding sound buffer to provide better IRQ0 timing. (merge aba928c) (commit by @crazii)
🐛 Bug Fixes
5d72285- OPL volume x1.5 (merge 39b8a1d) (commit by @crazii)521aa1e- set T for BLASTER env. (merge 77155a4) (commit by @crazii)daa0c83- change /VOL volume range from [0,9] to [0, 100] for better granuarity control. if you previously set /VOL8 in your AUTOEXEC.BAT, then a simple change to /VOL80 would be fine. for more details, check the "/VOL" in README.txt (merge 3471ab7) (commit by @crazii)c940a0e- fix Virtual DMA flipflop bug when accessed by BIOS (HP T5720) in duke3d and rott. (merge 5d7b649). (commit by @crazii)
📝 Documentation Changes
User instructions
Available files
If you wish to use SBEMU and its dependencies in an existing DOS installation, you'll find the necessary
files in SBEMU.zip.
Alternatively, The USB image can be written to a USB drive or SD card using a tool like balenaEtcher.
The advantage of using Etcher is that you don't have to decompress the You can run the image in a VM with QEMU as follows:
If you wish to test Intel HDA compatibility instead of ICHx AC'97 compatibility, replace If you prefer to use another hypervisor, such as VirtualBox or VMware, you may have to convert the raw image to a supported VM image format first:
NOTE: Although VMs can sometimes be useful during development, testing and debugging, you should not rely on those for actual hardware compatibility testing, since the sound cards that the hypervisors emulate are themselves merely approximations of actual hardware, and will not behave like the real thing in every single corner case. There are multiple convenient distributions out there that contain DOS games that can be distributed freely and legally. Here are a few links to such distributions:
SBEMU-FD13-USB.img.xz provides SBEMU and is dependencies preconfigured inside a compressed
bootable FreeDOS image that you can write to a USB flash drive or an SD card.
Preparing a bootable USB drive
Preparing a bootable USB drive
.xz archive first.
It will decompress such files automatically, before writing the image to the target drive.
Booting the USB image in a virtual machine
Booting the USB image in a virtual machine
unxz SBEMU-FD13-USB.img.xz
qemu-system-i386 -drive file=SBEMU-FD13-USB.img,format=raw -device AC97
AC97 with intel-hda in the last command above.
On Linux, you can include the parameter --enable-kvm to run the VM with hardware-assisted virtualization.
unxz SBEMU-FD13-USB.img.xz
qemu-img convert -f raw -O vmdk SBEMU-FD13-USB.img SBEMU-FD13-USB.vmdk
Basically, you shouldn't test emulators on other emulators.
Where can I get some DOS games to test with?
Where can I get some DOS games to test with?
Specifically freeware, shareware, open source and free demo versions.