mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-04-13 12:22:33 -05:00
f6a44c9409
genesis_plus_gx (12 files), picodrive (18 files), fbneo (19 systems), hatari (TOS ROMs), bluemsx (60+ MSX/ColecoVision/SG-1000), fceumm (FDS/Game Genie), bsnes (20 coprocessor ROMs), beetle_psx (5 BIOS + aliases), beetle_saturn (5 files), puae (14 Kickstart ROMs, 3 naming conventions) 21 total emulator profiles. Cross-reference: 436 undeclared files, 120 already in repo, 316 to source.
176 lines
5.9 KiB
YAML
176 lines
5.9 KiB
YAML
emulator: PicoDrive
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type: libretro
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source: "https://github.com/libretro/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-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 and Sega Pico support.
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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:1265-1329):
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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 core
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has built-in HLE that generates replacement code at startup when the external
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BIOS pointers are NULL (pico/32x/memory.c:2200 get_bios(), pico/32x/32x.c:172).
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The libretro frontend does not expose any 32X BIOS loading path. Only the
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standalone platform code references 32X_M_BIOS.BIN / 32X_S_BIOS.BIN, and
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that code is currently disabled (#if 0 in platform/common/emu.c:1529).
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Master System, Game Gear, SG-1000: no BIOS file loaded. The core initializes
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VDP registers and RAM to simulate post-BIOS state (pico/sms.c:1080-1096).
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files:
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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:1266"
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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:1266"
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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:1266"
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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:1266"
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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:1269"
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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:1269"
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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:1269"
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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:1269"
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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:1272"
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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:1272"
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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:1272"
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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:1272"
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# -------------------------------------------------------
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# Sega 32X - HLE available, not loaded by libretro frontend
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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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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:2207-2243"
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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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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:2250-2277"
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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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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:2280-2298"
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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:1310-1318"
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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:53-55, 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:1080-1096"
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