SBEMU

For old DOS games and programs, there is this: https://github.com/crazii/SBEMU

From the title I thought this would be about running DOS on an old laptop on bare metal. There even exists this to emulate SoundBlaster on a modern sound card: https://github.com/crazii/SBEMU

What about FreeDOS? FreeDOS with SBEmu is really nice for an instant DOS machine on real hardware: https://github.com/crazii/SBEMU/releases

DOS emulation is not a very battery-efficient way to play '88-98 games on the go, so projects like these seem to cater to that specific need, letting people run DOS natively. The Toshiba Libretto was a nice, small machine, but finding one in good condition is super hard. Toshiba Portégé was another, but after Pentium-II models, they took away the OPL3 card in favor of something more Windows-friendly (AC97), which doesn't have good DOS drivers. Now there's SBEMU (https://github.com/crazii/SBEMU), which can emulate SB/SBPRO/SB16 on top of newer PCI-based sound cards, including AC97 ones, solving that problem. Now it's possible to have sound on a Pentium-II, III, M and Atom machines running DOS, like a Sony Vaio P.

Like vintage computers? https://github.com/crazii/SBEMU Sound Blaster emulator running on modern PCI/AC97 sound cards. Involves sound, deep knowledge of x86 CPUs (VM86/virtual and protected modes, memory protection, supervisors, privilege levels, trapping IO/IRQa, x86 CPU quirks), DOS and plenty of testing using 20 year old games.