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e13e8734b9
240 file-level entries used notes: instead of the canonical note: field. verify.py and cross_reference.py only read note:, so these were silently ignored.
84 lines
2.9 KiB
YAML
84 lines
2.9 KiB
YAML
emulator: JollyCV
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type: libretro
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core_classification: official_port
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source: "https://github.com/libretro/jollycv"
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upstream: "https://gitlab.com/jgemu/jollycv"
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profiled_date: "2026-03-24"
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core_version: "2.0.0"
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display_name: "ColecoVision/CreatiVision/My Vision (JollyCV)"
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cores:
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- jollycv
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systems:
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- colecovision
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- creativision
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- myvision
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notes: |
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JollyCV is a multi-system emulator by Rupert Carmichael supporting
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ColecoVision (with Super Game Module), CreatiVision, and My Vision.
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BIOS handling depends on the detected system type (set via core option
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or auto-detected from ROM database via jcv_process_hash/jcv_get_dbflags):
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- ColecoVision (JCV_SYS_COLECO): loads "coleco.rom" from system dir.
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BIOS is mapped at 0x0000-0x1FFF. Size must be exactly 8192 bytes
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(SIZE_CVBIOS = SIZE_8K = 0x2000). Load fails if size mismatches.
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Without the BIOS, ColecoVision games will not run (load returns false).
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- CreatiVision (JCV_SYS_CRVISION): loads "bioscv.rom" from system dir.
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BIOS is mapped at 0xF800-0xFFFF. Size must be exactly 2048 bytes
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(SIZE_CRVBIOS = SIZE_2K = 0x800). Without the BIOS, CreatiVision
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games will not run.
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- My Vision (JCV_SYS_MYVISION): no BIOS required.
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The libretro port constructs paths via snprintf("%s%c%s", sysdir, pss,
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filename) in libretro.c:699-711. jcv_bios_load_file() opens the file,
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reads it fully, then delegates to jcv_coleco_bios_load() or
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jcv_crvision_bios_load() which validate size before copying.
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ColecoVision cartridge header bytes at offset 0x0000-0x0001 control
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boot behavior: 0xAA55 shows the BIOS title screen, 0x55AA jumps
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directly to the game code vector.
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The core includes a built-in ROM database with MD5 hashes (gamedb.h)
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for game-specific flags, but this is for game compatibility, not BIOS
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verification.
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files:
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# --- ColecoVision BIOS (required for CV games) ---
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- name: "coleco.rom"
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system: colecovision
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required: true
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size: 8192
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validation: [size]
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source_ref: "libretro/libretro.c:701, src/jcv_coleco.c:402-406"
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note: "Mapped at 0x0000-0x1FFF. Replaced by SGM lower RAM when Super Game Module is active. Must be exactly 8192 bytes."
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# --- CreatiVision BIOS (required for CreatiVision games) ---
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- name: "bioscv.rom"
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system: creativision
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description: "VTech CreatiVision BIOS ROM"
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required: true
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size: 2048
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validation: [size]
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source_ref: "libretro/libretro.c:711, src/jcv_crvision.c:315-318"
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note: "Mapped at 0xF800-0xFFFF. Must be exactly 2048 bytes."
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platform_details:
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colecovision:
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bios_filename: "coleco.rom"
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bios_size: 8192
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memory_map: "0x0000-0x1FFF"
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source_ref: "src/jcv_coleco.c:269-281"
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creativision:
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bios_filename: "bioscv.rom"
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bios_size: 2048
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memory_map: "0xF800-0xFFFF"
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source_ref: "src/jcv_crvision.c:315-337, 441"
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myvision:
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bios_required: false
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note: "No BIOS needed. My Vision games run without any system ROM."
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