mirror of
https://github.com/Abdess/retroarch_system.git
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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.
83 lines
3.1 KiB
YAML
83 lines
3.1 KiB
YAML
emulator: BlastEm
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type: standalone + libretro
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core_classification: official_port
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source: "https://github.com/libretro/blastem"
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upstream: "https://www.retrodev.com/blastem/"
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profiled_date: "2026-03-23"
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core_version: "v0.6.3-pre"
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display_name: "Sega - Mega Drive - Genesis (BlastEm)"
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cores:
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- blastem
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systems:
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- sega-megadrive
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- sega-mastersystem
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notes: |
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BlastEm is a cycle-accurate Sega Mega Drive/Genesis emulator with basic
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Master System support. In standalone mode it supports TMSS ROM loading and
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multiple hardware models (MD1 VA0 through MD3 VA2, Teradrive). The Jaguar
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emulator (blastjag) is a separate standalone binary, not part of the
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libretro core.
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The libretro port (libblastem.c) does NOT expose any core options and
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defaults to model md1va3 which has TMSS disabled. There is no way to
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select a TMSS-enabled model through the libretro interface.
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Even if a TMSS-enabled model were forced, read_bundled_file() in the
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libretro build only serves rom.db and returns NULL for tmss.md, so TMSS
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ROM loading would fail (fatal_error at genesis.c:1923).
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Sega CD / Mega CD is not supported (only a TODO comment in system.c:16).
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No BIOS files are required or loaded by the libretro core.
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files:
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# rom.db is embedded in the libretro binary (libblastem.c:532-542,
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# extern const char rom_db_data[]). The external file is an optional
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# override — .info lists it as firmware0_opt=true.
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# .info sha1 E5414FB1C4CC7D7F5101C07E4547316779BA3D97 does not match
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# the version in our repo (sha1 02c287d1...) — rom.db changes between
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# BlastEm releases.
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- name: rom.db
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system: sega-megadrive
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required: false
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hle_fallback: true
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note: "ROM feature database (game-specific mapper/save config). Embedded in core, external is optional override."
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source_ref: "libblastem.c:532-542 read_bundled_file()"
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# TMSS ROM — only used in standalone mode with tmss-enabled model
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# libretro build returns NULL for tmss.md (libblastem.c:541)
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- name: tmss.md
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system: sega-megadrive
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required: false
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mode: standalone
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size: 2048
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note: "TMSS startup ROM. Standalone only (models md1va6, md2va1+). Libretro core uses md1va3 (tmss off), no way to change."
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source_ref: "genesis.c:1910-1923"
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analysis:
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tmss:
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standalone_support: true
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libretro_support: false
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default_model: md1va3
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default_tmss: "off"
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rom_filename: tmss.md
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rom_size: 2048 # 2 KB
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config_path: "system\0tmss_path\0"
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source_ref: "genesis.c:1910"
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note: |
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TMSS ROM is loaded from tmss.md (configurable via system/tmss_path).
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Models with tmss=on: md1va6, md2va1, md2va2, md3va1, md3va2.
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Models with tmss=off: md1va0, md1va3 (default), teradrive.
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The libretro build uses md1va3 (tmss off) with no option to change.
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sega_cd:
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supported: false
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source_ref: "system.c:16"
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note: "TODO comment only: 'Differentiate between vanilla Genesis and Sega CD/32X games'"
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jaguar_bios:
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libretro_relevant: false
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note: |
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blastjag (jaguar.c) is a separate standalone binary, not compiled
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into the libretro core. Requires BIOS as first CLI argument.
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