mirror of
https://github.com/Abdess/retroarch_system.git
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52 lines
2.4 KiB
YAML
52 lines
2.4 KiB
YAML
emulator: EmuCV
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type: libretro
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core_classification: pure_libretro
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source: "https://gitlab.com/MaaaX-EPOCH84/libretro-emucv"
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profiled_date: "2026-09-17"
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pin_frozen: "the shipping core is this revision. HEAD removed the prototype from the tree on 2026-09-11 (a188c0f) and archived its last description files on 2026-09-12 (06a066a); the new skeleton has not yet been copied from libretro-emuscv1 (ROADMAP step 4.3). Recaling would repoint these refs at a tree that currently holds nothing but a roadmap."
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source_commit: "6a6e1b15c5d5afefbc3fefdd8b52f3f2c8c0a0eb"
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core_version: "0.00"
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display_name: "EPOCH - Cassette Vision (EmuCV)"
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cores:
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- emucv
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systems:
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- epochcv
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notes: |
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Cassette Vision emulator written for libretro by Maxime Marconato. The
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console has no system ROM: each cartridge carries the NEC uPD777 (or
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uPD778) that runs it, so the cartridge dump is the whole machine.
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Content is opened from its full path (need_fullpath = true,
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src/core.cpp:307) with a plain fopen (src/emu.cpp:138,
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src/fileio.cpp:84-93). The file must be exactly 4064 bytes, the 2032
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valid program addresses as 16-bit words (src/emu.h:16, src/emu.h:223,
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src/emu.cpp:143-153); any other size zeroes program memory and leaves
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the cartridge not inserted. Each word is read as a big-endian 12-bit
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instruction (src/emu.cpp:159-164). The commented MD5 check at
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src/emu.cpp:313-320 is not compiled.
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The uPD778 character generator (128 patterns of 7 lines) is a static
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table compiled into the core, pattern_778c at src/emu.cpp:168-307, and
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is never read from disk.
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RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY and GET_SAVE_DIRECTORY are
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queried at init and stored (src/core.cpp:362-366, src/core.cpp:377-381,
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src/common.cpp:1054-1094). Nothing reads them back: the path helpers
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inherited from the Common Source Code Project (get_application_path,
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create_local_path, the ini reader and writer) sit inside comment blocks
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(src/common.cpp:799-937, src/common.cpp:1095-1719). Core options are
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not registered, f_retro_load_settings and f_retro_save_settings are
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empty (src/core.cpp:2562-2895, src/core.cpp:2900-3099). No save RAM
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(src/core.cpp:3437-3450) and no save states (src/core.cpp:3374-3390).
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The .info declares firmware_count = 0 and matches the code.
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files: []
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platform_details:
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cpu: "NEC uPD777C / uPD778C, one per cartridge"
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program_memory: "2032 words of 12 bits"
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pattern_memory: "896 bytes, compiled in"
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source_ref: "src/emu.h:16-19"
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