DOSBox PSP vs js-dos

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.

js-dos provides a JavaScript API and player for running DOS and Windows 9x programs in a browser or Node. It supports DOSBox and DOSBox-X backends, including Windows 95 and 98 system images through DOSBox-X. Developers can add the player to a webpage from its CDN, install it from npm, or download it from GitHub releases. A basic player needs static website hosting and no backend, but the page must be served over HTTP rather than opened with the file protocol. Browser IPX networking uses WebRTC-NET for IPX servers, peer and alias connections, and shared network instances. Game progress is kept in browser storage by default, which may be wiped; cloud saves can be enabled with a secret key. Custom save storage is supported through filesystem change hooks, and local persistence uses OPFS. All users can read sockdrive storage, while subscribers can write to it to save progress and install games. The site describes WebGL-backed 3Dfx rendering. Mobile support is marked production for v7 and work in progress for v8.