DOS-Emulator vs DOSBox PSP

DOS-Emulator is a free IBM PC emulator that runs DOS and is written in Rust. Source code is available under the MIT License, and users can build it with Cargo or download a prebuilt binary from GitHub releases. The README identifies macOS and Ubuntu Linux as supported hosts; Windows lacks the ANSI escape sequences required by its CLI dependency. The project is inspired by DOSBox but is not a direct port, and many features are implemented differently or absent. Only Game of ROBOT episodes 0, 1, 3, and 4 are known to be playable. Its command-line interface can quit, pause into a debugger, or open a keyboard-mapping tool. The debugger profiles instructions, inspects register-selected data, scrolls its overview, and supports continue, step-over, and single-step actions. The architecture separates video and input on a GUI thread from audio synthesis for Sound Blaster and beeper signals. The latest listed release is v0.1.0.

DOSBox PSP is a DOSBox port for running MS-DOS software on the PlayStation Portable. The project describes it as DOSBox adapted with PSP patches, and credits crazyc with the original port. It supports CUE/BIN disk images, gamepads, audio CDs and Neo Geo CD; save states are not supported. Configuration is stored in dosbox.conf: some settings can be changed through batch files, while others require editing the file. CPU cycle settings are a key factor in performance and may take trial and error to tune. The dynamic CPU core can improve performance for most games, but may reduce stability. Available memory varies by model: the PSP 1000 is limited to around 12 MB, while PSP 2000, 3000 and Go models can allocate about 42 MB by changing memsize; higher settings may cause instability. The initial pre-release build starts at a command line without a file manager, and the project recommends adding a third-party launcher such as LaunchBox for MS-DOS. The project lists a GPL-2.0 license and requires the PSP toolchain to build.