riapyx

6.5easy start · #19of 26
in MS-DOS Emulators

Well documentedyes
Runs where you workyes

Runs on Linux, Mac, Windows.

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riapyx is ranked #19 of 26 in MS-DOS emulators on The Geeks Club. It runs on Linux, macOS, Windows.

Compared on MS-DOS emulators

Free plan: Yes
Supported host platforms: Windows, macOS
DOS target versions: ms-dos
Source available: Yes

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DosKit Lesson 17.4 DOS Browser Lesson 27.3 Magic DosBox Lesson 37.2 DOS Wasm X Lesson 47.1 DOSBox Lesson 57.1 js-dos Lesson 67.1

The record

Purpose: riapyx is an early PC (8086) emulator written in Rust, targeting Windows 3.0 in real mode.
Emulated hardware: It emulates an Intel 8086 CPU, XT keyboard, limited CGA graphics, a serial port, a Microsoft serial mouse, and floppy and hard drives through BIOS calls.
Hardware gaps: It does not emulate a programmable interrupt controller, programmable interval timer, DMA controller, or proper IDE hard and floppy drives.
Operating systems: It can run MS-DOS 6.22 and Windows 3.0 in real mode; the README says it cannot boot ELKS or FreeDOS.
Disk images: The README recommends pre-installed hard-drive images because floppy switching is unsupported and installing an operating system is unlikely to work.
Build: The project is built with Cargo and uses rust-sdl2, whose platform installation instructions are referenced for Windows and OS X users.
Usage: The command line accepts hard-drive and floppy images and lets the user choose which drive to boot.
Debugger: Its debugger supports stepping, continuing, tracing, dumping RAM, breakpoints, memory display, disassembly, and quitting.
Logging: Optional Cargo features provide CPU, display, mouse, serial, BIOS, storage, machine, and keyboard logs, among other debugging aids.
Performance: The maker says the emulator does not aim for good performance and received only minimal profiling and simple optimizations.
Graphics: The emulated CGA adapter supports 80×25 16-color text mode and 640×200 2-color mode.
Distribution: The repository provides source files and Cargo build instructions; its README does not describe packaged downloads.
Original target: Its main target was running Windows 3.0 in real mode.
Compatibility limits: It cannot boot ELKS or FreeDOS, and the README says installing an operating system is unlikely because floppy switching is unsupported and untested.

Where it ranks on The Geeks Club

Best MS-DOS Emulators in 2026#19 of 26

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Sources

github.com/ynben/riapyx· checked 9 Oct 2026