vecx - RetroBIOS

Type	libretro
Source	https://github.com/libretro/libretro-vecx
Version	SVN
Profiled	2026-03-18
Cores	vecx
Systems	gce-vectrex

No BIOS or firmware files required. This core is self-contained.

vecx is a GCE Vectrex emulator ported to libretro.

The Vectrex system ROM (8192 bytes) is fully embedded in the binary. There are three compile-time BIOS variants in bios/: - system.h (STANDARD_BIOS, default) - original Vectrex ROM - fast.h (FAST_BIOS) - modified BIOS with faster boot - skip.h - modified BIOS that skips the intro

The default build uses STANDARD_BIOS via #define at libretro.c:20. At load time (retro_load_game, libretro.c:736): memcpy(rom, bios_data, bios_data_size); This copies the compiled-in BIOS data into the rom[8192] array (vecx.c:40, mapped at 0xE000-0xFFFF via vecx.c:437-439).

The core never calls RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY and has no code path to load an external BIOS file from disk. No .info file is shipped with the repo declaring firmware requirements.

rom.dat in the repo root is identical to bios/system.bin (same MD5: ab082fa8c8e632dd68589a8c7741388f), likely kept for standalone builds.

Generated on 2026-03-20T19:12:20Z