mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-04-13 12:22:33 -05:00
66 lines
2.4 KiB
YAML
66 lines
2.4 KiB
YAML
emulator: vecx
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type: libretro
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core_classification: community_fork
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source: "https://github.com/libretro/libretro-vecx"
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upstream: "https://github.com/jhawthorn/vecx"
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profiled_date: "2026-03-25"
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core_version: "SVN"
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display_name: "GCE - Vectrex (vecx)"
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cores:
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- vecx
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systems:
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- gce-vectrex
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notes: |
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vecx is a GCE Vectrex emulator ported to libretro.
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The Vectrex system ROM (8192 bytes) is fully embedded in the binary.
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There are three compile-time BIOS variants in bios/:
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- system.h (STANDARD_BIOS, default) - original Vectrex ROM
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- fast.h (FAST_BIOS) - modified BIOS with faster boot
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- skip.h - modified BIOS that skips the intro
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The default build uses STANDARD_BIOS via #define at libretro.c:20.
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At load time (retro_load_game, libretro.c:736):
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memcpy(rom, bios_data, bios_data_size);
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This copies the compiled-in BIOS data into the rom[8192] array
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(vecx.c:40, mapped at 0xE000-0xFFFF via vecx.c:437-439).
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The core never calls RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY and has
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no code path to load an external BIOS file from disk. No .info file
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is shipped with the repo declaring firmware requirements.
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rom.dat in the repo root is identical to bios/system.bin (same MD5:
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ab082fa8c8e632dd68589a8c7741388f), likely kept for standalone builds.
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files: []
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platform_details:
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bios_mapping:
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target: "0xE000-0xFFFF in Vectrex address space (8 KB)"
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source_ref: "vecx.c:40 (unsigned char rom[8192]), vecx.c:437-439 (read handler)"
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notes: |
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CPU reads from 0xE000-0xFFFF are served from rom[] via
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address & 0x1FFF masking. The array is populated from the
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compiled-in bios_data at retro_load_game() time.
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embedded_bios:
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source_ref: "libretro.c:20-30, bios/system.h"
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standard_bios:
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md5: "ab082fa8c8e632dd68589a8c7741388f"
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sha1: "65d07426b520ddd3115d40f255511e0fd2e20ae7"
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size: 8192
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fast_bios:
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md5: "a970aed37cffd29ab3740f8e79518858"
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sha1: "e0900be6d6858b985fd7f0999d864b2fceaf01a1"
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size: 8192
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skip_bios:
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md5: "05f32c2b18b6fb168ab976989e86dfb1"
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sha1: "6c891bd74acb201d54071b310bd6df6617cdf205"
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size: 8192
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notes: |
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All three variants are 8192 bytes, compiled as C arrays in
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bios/*.h headers. STANDARD_BIOS is the authentic Vectrex ROM.
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FAST_BIOS and skip are modified versions for faster startup.
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Selection is compile-time only (#ifdef chain, libretro.c:20-30).
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