Deecy

What Deecy is

Deecy is an experimental, open-source Dreamcast emulator written in Zig for Windows and Linux. Its command-line interface can load .gdi, .cdi, and .chd disc files. To get started, users provide BIOS and flash dumps named dc_boot.bin and dc_flash.bin in the data folder, then select the folder containing their disc images. Deecy should detect and map controllers automatically; users can also assign guest ports manually and customize keyboard bindings. It provides four save-state slots and four corresponding load-state slots, plus fullscreen toggling and an unlimited emulation-speed mode. On Linux, the optional --scif feature pipes a serial port to /tmp/deecy/scif for dcload-serial prototyping. DreamPicoPort is also available as an optional build dependency. The project maintains a compatibility list and identifies unfinished areas, including AICA filtering, framebuffer handling, exclusion modifier volumes, and renderer features. Deecy is free, with unstable builds for both supported operating systems.