mirror of
https://github.com/Abdess/retroarch_system.git
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0543165ed2
batch re-profiled nekop2 through pokemini. mupen64plus renamed to mupen64plus_next. new profiles: nes, mupen64plus_next. validation functions (_build_validation_index, check_file_validation) consolidated in common.py — single source of truth for verify.py and generate_pack.py. pipeline 100% consistent on all 6 platforms.
200 lines
6.9 KiB
YAML
200 lines
6.9 KiB
YAML
emulator: PicoDrive
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type: libretro
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core_classification: official_port
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source: "https://github.com/libretro/picodrive"
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upstream: "https://github.com/irixxxx/picodrive"
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profiled_date: "2026-03-24"
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core_version: "1.99"
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display_name: "Sega - MS/GG/MD/CD/32X (PicoDrive)"
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cores: [picodrive]
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systems:
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- sega-megadrive
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- sega-genesis
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- sega-megacd
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- sega-segacd
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- sega-32x
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- sega-mastersystem
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- sega-gamegear
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- sega-sg1000
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- sega-sc3000
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- sega-pico
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notes: |
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PicoDrive is a fast Mega Drive / Genesis emulator with Mega CD, 32X, Master
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System, Game Gear, SG-1000, SC-3000 and Sega Pico support. The libretro port
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is part of the PicoDrive source tree (platform/libretro/).
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Mega CD / Sega CD games require a region-matching BIOS file. The core searches
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the system directory for each name in order, trying .bin then .zip extension,
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and uses the first file found. If no BIOS is found, CD games fail to load with
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PM_BAD_CD_NO_BIOS. MSU-MD games can run without BIOS.
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BIOS filename search order (platform/libretro/libretro.c:1264-1328):
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US: us_scd2_9306, SegaCDBIOS9303, us_scd1_9210, bios_CD_U
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EU: eu_mcd2_9306, eu_mcd2_9303, eu_mcd1_9210, bios_CD_E
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JP: jp_mcd2_921222, jp_mcd1_9112, jp_mcd1_9111, bios_CD_J
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32X BIOS files (m68k, master SH2, slave SH2) are fully optional. The engine
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has built-in HLE that generates replacement code at startup when the BIOS
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pointers are NULL (pico/32x/memory.c:2199 get_bios(), pico/32x/32x.c:172).
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No current frontend (libretro or standalone) loads these files; the standalone
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loading code is disabled (#if 0 in platform/common/emu.c:1529).
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carthw.cfg is a cartridge hardware database loaded from the system directory.
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A built-in version is compiled into the core (pico/carthw_cfg.c). The external
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file supplements or overrides game-specific hardware detection (SVP, EEPROM
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types, special mappers, copy protection).
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Master System, Game Gear, SG-1000, SC-3000: no BIOS file loaded. The core
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initializes VDP registers and RAM to simulate post-BIOS state
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(pico/sms.c:1080-1097).
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files:
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# -------------------------------------------------------
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# Cartridge hardware database
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# -------------------------------------------------------
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- name: "carthw.cfg"
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required: false
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note: "Cartridge hardware database for special mapper and EEPROM detection. Built-in fallback compiled into the core."
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source_ref: "platform/libretro/libretro.c:1619, pico/cart.c:1020-1022"
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# -------------------------------------------------------
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# Mega CD / Sega CD - US region
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# -------------------------------------------------------
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- name: "us_scd2_9306.bin"
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system: sega-segacd
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required: true
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size: 131072 # 128 KB (0x20000)
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note: "US Sega CD Model 2 BIOS (September 1993). First in US search order."
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source_ref: "platform/libretro/libretro.c:1265"
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- name: "SegaCDBIOS9303.bin"
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system: sega-segacd
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required: false
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size: 131072
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note: "US Sega CD BIOS (March 1993). Second in US search order."
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source_ref: "platform/libretro/libretro.c:1265"
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- name: "us_scd1_9210.bin"
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system: sega-segacd
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required: false
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size: 131072
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note: "US Sega CD Model 1 BIOS (October 1992). Third in US search order."
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source_ref: "platform/libretro/libretro.c:1265"
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- name: "bios_CD_U.bin"
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system: sega-segacd
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required: false
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size: 131072
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note: "US Sega CD BIOS (generic name). Last in US search order."
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source_ref: "platform/libretro/libretro.c:1265"
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# -------------------------------------------------------
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# Mega CD / Sega CD - EU region
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# -------------------------------------------------------
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- name: "eu_mcd2_9306.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: "EU Mega CD Model 2 BIOS (June 1993). First in EU search order."
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source_ref: "platform/libretro/libretro.c:1268"
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- name: "eu_mcd2_9303.bin"
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system: sega-megacd
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required: false
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size: 131072
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note: "EU Mega CD Model 2 BIOS (March 1993). Second in EU search order."
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source_ref: "platform/libretro/libretro.c:1268"
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- name: "eu_mcd1_9210.bin"
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system: sega-megacd
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required: false
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size: 131072
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note: "EU Mega CD Model 1 BIOS (October 1992). Third in EU search order."
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source_ref: "platform/libretro/libretro.c:1268"
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- name: "bios_CD_E.bin"
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system: sega-megacd
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required: false
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size: 131072
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note: "EU Mega CD BIOS (generic name). Last in EU search order."
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source_ref: "platform/libretro/libretro.c:1268"
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# -------------------------------------------------------
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# Mega CD / Sega CD - JP region
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# -------------------------------------------------------
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- name: "jp_mcd2_921222.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: "JP Mega CD Model 2 BIOS (December 1992). First in JP search order."
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source_ref: "platform/libretro/libretro.c:1271"
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- name: "jp_mcd1_9112.bin"
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system: sega-megacd
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required: false
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size: 131072
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note: "JP Mega CD Model 1 BIOS (December 1991). Second in JP search order."
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source_ref: "platform/libretro/libretro.c:1271"
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- name: "jp_mcd1_9111.bin"
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system: sega-megacd
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required: false
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size: 131072
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note: "JP Mega CD Model 1 BIOS (November 1991). Third in JP search order."
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source_ref: "platform/libretro/libretro.c:1271"
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- name: "bios_CD_J.bin"
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system: sega-megacd
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required: false
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size: 131072
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note: "JP Mega CD BIOS (generic name). Last in JP search order."
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source_ref: "platform/libretro/libretro.c:1271"
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# -------------------------------------------------------
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# Sega 32X - HLE available, no frontend loads these
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# -------------------------------------------------------
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- name: "32X_G_BIOS.BIN"
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system: sega-32x
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required: false
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hle_fallback: true
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size: 256 # 0x100
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note: "32X 68K (Genesis-side) BIOS. HLE replacement generated when NULL."
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source_ref: "pico/32x/memory.c:2206-2243"
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- name: "32X_M_BIOS.BIN"
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system: sega-32x
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required: false
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hle_fallback: true
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size: 2048 # 0x800
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note: "32X Master SH2 BIOS. HLE replacement generated when NULL."
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source_ref: "pico/32x/memory.c:2249-2276"
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- name: "32X_S_BIOS.BIN"
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system: sega-32x
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required: false
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hle_fallback: true
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size: 1024 # 0x400
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note: "32X Slave SH2 BIOS. HLE replacement generated when NULL."
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source_ref: "pico/32x/memory.c:2279-2297"
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platform_details:
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megacd:
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bios_size: 131072 # 128 KB
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hle_available: false
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region_specific: true
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extensions_tried: [".bin", ".zip"]
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source_ref: "pico/pico_int.h:559, platform/libretro/libretro.c:1309-1317"
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32x:
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m68k_bios_size: 256 # 0x100
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master_sh2_bios_size: 2048 # 0x800
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slave_sh2_bios_size: 1024 # 0x400
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hle_available: true
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source_ref: "pico/pico.h:54-55, pico/pico_int.h:679-693"
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sms:
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hle_available: true
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note: "No BIOS file loaded. VDP/RAM initialized to post-BIOS state."
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source_ref: "pico/sms.c:1080-1097"
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