Deecy vs nullDC 2.0.0

Deecy is an experimental, open-source Dreamcast emulator written in Zig for Windows and Linux. Its command-line interface loads .gdi, .cdi and .chd disc files, but setup requires users to provide BIOS and flash dumps named dc_boot.bin and dc_flash.bin in the data folder, then choose the directory containing disc images. Deecy should detect and map controllers automatically; users can also assign guest ports manually and customize keyboard bindings. Keyboard shortcuts provide four save-state slots and four matching load-state slots. The emulator supports fullscreen toggling and an unlimited emulation-speed mode. On Linux, the --scif option pipes a serial port to /tmp/deecy/scif for dcload-serial prototyping. DreamPicoPort support is available as an optional build dependency and can be disabled at build time. The project maintains a compatibility list and directs bug reports to its GitHub issue tracker, though issue creation is restricted. The project lists unfinished areas including AICA filtering, framebuffer handling, exclusion modifier volumes and renderer features. The main project is MIT licensed, with MAME data under BSD-3-Clause and CHD features based on MAME code. Unstable builds are available for Windows and Linux.

nullDC 2.0.0 is a Sega Dreamcast emulator, with a browser option and downloadable builds for Windows, macOS, and Linux. The browser page provides a WASM embed where users can drop files to start the emulator. One startup option uses dc_boot.bin (2MB) and dc_flash.bin (128KB); the other is an .elf executable. The project describes its aim as accurate emulation. Its builds page lists v2.0.0-pre-388-g95a924b as the most recent build, dated 2025-11-10 08:17:38 UTC. Windows and macOS artifacts are listed for aarch64 and x86_64; Linux artifacts include aarch64, riscv64gc, and x86_64. The project is open source under the MIT license, which provides the software without warranty. The home page also lists older beta releases, including beta 1.6 from 2007, and a stereoscopy build from 2008. The historical beta 1 netplay server is listed as compatible only with beta 1. For help, the project directs users to its forum at ngemu.com.