DOSBox Staging vs DOSVisor

DOSBox Staging runs MS-DOS and Windows 3.1 software on modern Windows, macOS, and Linux computers through built-in MS-DOS emulation. Its main compatibility goal is PC Booter, DOS, and Windows 3.1 games released from 1981 to 2000. Default settings are intended to let most games and applications work without adjustment, and existing DOSBox configurations remain usable. Graphics options include CRT emulation, aspect-ratio-correct output, VGA and 3dfx Voodoo emulation, and custom shaders. Emulated audio includes Roland MT-32 and SC-55, FluidSynth MIDI, OPL, Gravis UltraSound, and PC speaker sound. Networking includes Ethernet through SLiRP and ENet modem transport. Host features include clipboard integration, physical CD-ROM mounting, high-DPI support, and Windows 3.1 seamless mouse integration. An optional HTTP REST API can inspect or modify emulator state, but it is disabled by default and binds to localhost; exposing it to untrusted networks gives them full control of the emulator. The project says it collects no personal information and makes no network connection unless initiated by the user. It is free for personal use, without warranty, and intended for low-stakes scenarios.

DOSVisor is a Windows project that runs some MS-DOS programs in a virtualized 16-bit real-mode environment using the Windows Hypervisor Platform API. It is presented as a demonstration of that API rather than a complete DOS emulator. Hardware virtualization handles the CPU, while software emulates the DOS layer. A custom Interrupt Vector Table uses CPUID instructions to trigger VM exits and intercept DOS interrupts. DOSVisor captures I/O requests but supports only a small set of common requests. Timing support includes the BIOS counter, RAM refresh toggle bit, system clock, RTC registers, clock interrupts, and DOS current-time calls; the 8253 PIT timer is not fully implemented. Keyboard handling monitors state, keeps a simple buffer, and passes input through interrupts. Basic terminal commands support simple text-based games and other basic programs. BIOS data areas and the Program Segment Prefix are allocated but mostly unpopulated. The free public repository contains bin and src directories, with no releases or packages listed.