mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-10-11 14:03:23 -05:00
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.
166 lines
5.6 KiB
YAML
166 lines
5.6 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: "a7985a9c4278ac352f8ca7bb4d3cc6b36e9e3e7d"
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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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- genesisplusgx-expanded
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- genplus
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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]
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required: true
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note: "Sega CD (NTSC-U) boot ROM. Loaded for REGION_USA."
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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]
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required: true
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note: "Mega CD (PAL) boot ROM. Loaded for REGION_EUROPE."
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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]
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required: false
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note: "Master System (NTSC-U) boot ROM. Snail maze game built in."
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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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region: [europe]
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required: false
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note: "Master System (PAL) boot ROM. Snail maze / Sonic built in."
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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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