mirror of
https://github.com/Abdess/retroarch_system.git
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Abdessamad Derraz
bb19a6d5cf
100 emulator names the two platforms run had no profile, so their packs carried nothing for them. Each was read from the platform's own launcher or scriptmodule: the same program as an existing profile takes the name in cores:, a different build gets its own profile read from that version, a launcher or self-contained game goes to remove_cores, and the rest are new profiles written from their source or shipped binary. The files they need that the collection lacked are collected from the upstream distributions. Bungie and splitwolf trees are read by path and stay out of dedup.
165 lines
6.1 KiB
YAML
165 lines
6.1 KiB
YAML
emulator: Genesis Plus GX
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type: libretro
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core_classification: community_fork
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source: "https://github.com/libretro/Genesis-Plus-GX"
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upstream: "https://github.com/ekeeke/Genesis-Plus-GX"
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profiled_date: "2026-03-23"
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source_commit: "58c341487e5bfcf979ea68413c7987633adb0c56"
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core_version: "v1.7.4"
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display_name: "Sega - MS/GG/MD/CD (Genesis Plus GX)"
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cores:
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- genesis_plus_gx
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- genesisplusgx
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- genplus
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- "genesisplusgx_ex"
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systems:
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- sega-megadrive
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- sega-megacd
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- sega-mastersystem
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- sega-gamegear
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- sega-sg1000
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- sega-pico
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notes: |
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Genesis Plus GX is a Sega 8/16-bit emulator covering SG-1000, Master System,
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Game Gear, Mega Drive/Genesis, and Mega CD/Sega CD.
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BIOS loading is handled by load_bios() in core/loadrom.c. The libretro port
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resolves filenames from the system directory in libretro/libretro.c:3516-3527.
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Mega CD BIOS is required to boot CD images (load fails without it).
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Master System, Game Gear, and Mega Drive BIOS files are optional boot ROMs
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gated behind the "genesis_plus_gx_bios" core option (config.bios).
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Lock-on ROMs (Game Genie, Action Replay, Sonic & Knuckles) are optional
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and loaded only when the corresponding lock-on feature is enabled.
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files:
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# -------------------------------------------------------
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# Sega Mega CD / Sega CD - boot ROMs (required for CD)
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# -------------------------------------------------------
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- name: bios_CD_U.bin
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system: sega-megacd
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region: [north-america, latin-america]
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required: true
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note: "Sega CD (NTSC-U) boot ROM. Loaded for REGION_USA, which get_region sets for every disc whose security byte is neither 0x64 (Europe) nor 0xa1 (Japan) (core/loadrom.c:1065-1078)."
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source_ref: "core/loadrom.c:409"
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- name: bios_CD_E.bin
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system: sega-megacd
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region: [europe, oceania]
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required: true
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note: "Mega CD (PAL) boot ROM. Loaded for REGION_EUROPE, set by security byte 0x64 at 0x20b, the only PAL branch for Australian discs (core/loadrom.c:1065-1069)."
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source_ref: "core/loadrom.c:412"
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- name: bios_CD_J.bin
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system: sega-megacd
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region: [japan]
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required: true
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note: "Mega CD (NTSC-J) boot ROM. Loaded for default/Japan region."
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source_ref: "core/loadrom.c:415"
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# -------------------------------------------------------
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# Sega Master System - boot ROMs (optional, behind config.bios)
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# -------------------------------------------------------
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- name: bios_U.sms
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system: sega-mastersystem
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region: [north-america, europe]
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required: false
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note: "Master System (NTSC-U) boot ROM. Snail maze game built in. REGION_USA is the default of sms_cart_region_detect for any export header outside the PAL CRC list, so European cartridges load it too (core/cart_hw/sms_cart.c:831-874)."
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source_ref: "core/loadrom.c:511"
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- name: bios_E.sms
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system: sega-mastersystem
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required: false
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note: "Master System (PAL) boot ROM. Snail maze / Sonic built in. REGION_EUROPE comes only from CRC lists of Codemasters and PAL-timing games, Brazilian ones included, or the PAL option (core/cart_hw/sms_cart.c:167-171, 245-264, core/loadrom.c:1161-1164)."
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source_ref: "core/loadrom.c:514"
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- name: bios_J.sms
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system: sega-mastersystem
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region: [japan]
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required: false
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note: "Master System (NTSC-J) boot ROM."
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source_ref: "core/loadrom.c:517"
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# -------------------------------------------------------
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# Sega Game Gear - boot ROM (optional, behind config.bios)
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# -------------------------------------------------------
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- name: bios.gg
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system: sega-gamegear
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required: false
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note: "Game Gear boot ROM (Majesco 1KB or standard). Shows startup logo."
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source_ref: "core/loadrom.c:480"
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# -------------------------------------------------------
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# Sega Mega Drive / Genesis - TMSS boot ROM (optional)
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# -------------------------------------------------------
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- name: bios_MD.bin
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system: sega-megadrive
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required: false
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note: "Mega Drive TMSS boot ROM. Shows 'Produced by or under license' screen."
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source_ref: "libretro/libretro.c:3780"
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# -------------------------------------------------------
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# Lock-on ROMs (optional, feature-gated)
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# -------------------------------------------------------
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- name: ggenie.bin
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system: sega-megadrive
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required: false
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note: "Game Genie ROM. Loaded when Game Genie lock-on is enabled."
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source_ref: "core/cart_hw/ggenie.c:64, libretro/libretro.c:3516"
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- name: areplay.bin
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system: sega-megadrive
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required: false
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note: "Action Replay (Pro) ROM. Loaded when Action Replay lock-on is enabled."
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source_ref: "core/cart_hw/areplay.c:64, libretro/libretro.c:3517"
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- name: sk.bin
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system: sega-megadrive
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required: false
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size: 2097152
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validation: [size]
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note: "Sonic & Knuckles ROM. Required for S&K lock-on feature."
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source_ref: "core/cart_hw/md_cart.c:867"
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- name: sk2chip.bin
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system: sega-megadrive
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required: false
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size: 262144
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validation: [size]
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note: "Sonic & Knuckles UPMEM ROM. Used by Sonic 2 & Knuckles lock-on."
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source_ref: "core/cart_hw/md_cart.c:873"
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platform_details:
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megacd:
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bootrom_size: 131072 # 128 KB
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source_ref: "core/cd_hw/scd.h:73"
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note: |
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CD boot ROM region is auto-detected from disc image header.
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Hardware model detected from boot ROM string at offset 0x120:
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WONDER-MEGA BOOT -> Wondermega
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WONDERMEGA2 BOOT -> Wondermega M2 / X'Eye
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CDX BOOT ROM -> CDX / Multi-Mega
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megadrive:
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tmss_rom_size: 2048 # 2 KB
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source_ref: "libretro/libretro.c:3648-3666"
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note: |
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TMSS boot ROM validated by checking "GENESIS OS" at offset 0x120.
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Only loaded when genesis_plus_gx_bios core option is enabled.
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mastersystem:
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bios_max_size: 4194304 # 4 MB (stored above cart ROM)
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source_ref: "core/loadrom.c:504-527"
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note: |
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BIOS ROM loaded into cart.rom + 0x400000. SEGA mapper assumed
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for ROMs larger than 48KB, otherwise no mapper.
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Region selected based on current region_code setting.
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gamegear:
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bios_max_size: 4194304 # 4 MB (stored above cart ROM)
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source_ref: "core/loadrom.c:467-489"
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note: |
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Handles 1KB Majesco GG BIOS (mapped to $0000-$03FF) and
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standard larger BIOS ROMs.
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