mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-04-13 12:22:33 -05:00
d2adde9846
add core_classification, cores, upstream fields. fix false aliases (fixnes, fsuae, gearboy, higan_sfc, higan_sfc_balanced, potator, quicknes). add new profiles (fbneo_neogeo, flycast_gles2, genesis_plus_gx_wide). remove verbose notes and disclaimers.
160 lines
5.4 KiB
YAML
160 lines
5.4 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: "2026-03-21"
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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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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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required: true
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size: 131072 # 128 KB (0x20000)
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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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required: true
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size: 131072
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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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required: true
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size: 131072
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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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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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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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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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size: 2048 # 2 KB (0x800)
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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:3651"
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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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size: 32768 # 32 KB (0x8000)
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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"
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- name: areplay.bin
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system: sega-megadrive
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required: false
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size: 65536 # max 64 KB (0x10000)
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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"
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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 # 2 MB (0x200000)
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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 # 256 KB (0x40000)
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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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notes: |
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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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notes: |
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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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notes: |
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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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notes: |
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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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