mirror of
https://github.com/Abdess/retroarch_system.git
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Abdessamad Derraz
11da070128
Upstream moved under 145 profiles: 679 refs shifted and 452 followed a renamed file, against 6,483 that still anchor where they were written. The recale rewrites the located ranges only, keeping the annotations and the sentences that carry them, and 106 pins advance in the same commit because refs and source_commit name one revision or the profile describes two at once. Nothing here was guessed. The 183 refs that are CHANGED, GONE or AMBIGUOUS are untouched, and the 57 profiles holding them keep their old pin until someone reads the diff: profile_sync refuses to recale a profile while any of its refs needs a re-read. trident kept its pin too, its annotated ref being one the writer will not rewrite.
84 lines
3.1 KiB
YAML
84 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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source_commit: "84e567e17b6fb3cea23146c4209c18d50d46cbf0"
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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:1933).
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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:1149-1172 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:3037-3050"
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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:1920"
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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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