Deecy vs WashingtonDC

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.

washDC, formerly known as WashingtonDC, is a free, open-source SEGA Dreamcast emulator for Linux and Microsoft Windows. It is intended for playing classic Dreamcast games on a modern x86 PC and was built from scratch rather than based on another emulator. The README lists GDI, CHD, CDI, ELF, and raw BIN game image formats, and says BIOS and flash images are required to run the emulator. Controls include keyboard input and support for up to four gamepads. Remote GDB and the WashDbg debugger are listed as TCP debugging options. Wash Emulation describes itself as a one-person team and washDC as its only product to date. The project also publishes homebrew programs for examining Dreamcast behavior, including tests of PowerVR2 backface culling and memory mirroring. Its separate gdisofs tool mounts Dreamcast game images as read-only filesystems on Linux PCs. The emulator is licensed under GNU GPL version 3. The maker links to project updates, Discord, and an email contact.