mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-11-01 15:43:45 -06:00
Abdessamad Derraz
1334e84a00
One run of profile_sync --all --rebase-refs --fresh. Every guard held: no ref to review, no prose left under an older pin, no file name or hash literal gained in a cited file since the pin, no built_by pin and no pin keyed by build mode. The site's record of cited source paths is rebuilt with them.
238 lines
8.3 KiB
YAML
238 lines
8.3 KiB
YAML
emulator: PicoDrive
|
|
type: libretro
|
|
core_classification: official_port
|
|
source: "https://github.com/libretro/picodrive"
|
|
upstream: "https://github.com/irixxxx/picodrive"
|
|
profiled_date: "2026-03-24"
|
|
source_commit: "1890c2932234c9d30f4cd3851d02228baae8f09e"
|
|
upstream_commit: "5f9e79f2177443939f21ab965b1c294edbef514c"
|
|
core_version: "1.99"
|
|
display_name: "Sega - MS/GG/MD/CD/32X (PicoDrive)"
|
|
cores: [picodrive]
|
|
systems:
|
|
- sega-megadrive
|
|
- sega-genesis
|
|
- sega-megacd
|
|
- sega-megacd
|
|
- sega-32x
|
|
- sega-mastersystem
|
|
- sega-gamegear
|
|
- sega-sg1000
|
|
- sega-sc3000
|
|
- sega-pico
|
|
|
|
notes: |
|
|
PicoDrive is a fast Mega Drive / Genesis emulator with Mega CD, 32X, Master
|
|
System, Game Gear, SG-1000, SC-3000 and Sega Pico support. The libretro port
|
|
is part of the PicoDrive source tree (platform/libretro/).
|
|
|
|
Mega CD / Sega CD games require a region-matching BIOS file. The core searches
|
|
the system directory for each name in order, trying .bin then .zip extension,
|
|
and uses the first file found. If no BIOS is found, CD games fail to load with
|
|
PM_BAD_CD_NO_BIOS. MSU-MD games can run without BIOS.
|
|
|
|
BIOS filename search order (platform/libretro/libretro.c:1272-1336):
|
|
US: us_scd2_9306, SegaCDBIOS9303, us_scd1_9210, bios_CD_U
|
|
EU: eu_mcd2_9306, eu_mcd2_9303, eu_mcd1_9210, bios_CD_E
|
|
JP: jp_mcd2_921222, jp_mcd1_9112, jp_mcd1_9111, bios_CD_J
|
|
|
|
32X BIOS files (m68k, master SH2, slave SH2) are fully optional. The engine
|
|
has built-in HLE that generates replacement code at startup when the BIOS
|
|
pointers are NULL (pico/32x/memory.c:2202 get_bios(), pico/32x/32x.c:172).
|
|
No current frontend (libretro or standalone) loads these files, and the standalone
|
|
loading code is disabled (#if 0 in platform/common/emu.c:1530).
|
|
|
|
carthw.cfg is a cartridge hardware database loaded from the system directory.
|
|
A built-in version is compiled into the core (pico/carthw_cfg.c). The external
|
|
file supplements or overrides game-specific hardware detection (SVP, EEPROM
|
|
types, special mappers, copy protection).
|
|
|
|
Master System, Game Gear, SG-1000, SC-3000: no BIOS file loaded. The core
|
|
initializes VDP registers and RAM to simulate post-BIOS state
|
|
(pico/sms.c:1080-1097).
|
|
|
|
files:
|
|
# -------------------------------------------------------
|
|
# Cartridge hardware database
|
|
# -------------------------------------------------------
|
|
- name: "carthw.cfg"
|
|
required: false
|
|
note: "Cartridge hardware database for special mapper and EEPROM detection. Built-in fallback compiled into the core."
|
|
source_ref: "source platform/libretro/libretro.c:1627, source pico/cart.c:1020-1022"
|
|
|
|
# -------------------------------------------------------
|
|
# Mega CD / Sega CD - US region
|
|
# -------------------------------------------------------
|
|
- name: "us_scd2_9306.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [north-america, latin-america]
|
|
priority: 1
|
|
required: true
|
|
size: 131072 # 128 KB (0x20000)
|
|
note: "US Sega CD Model 2 BIOS (September 1993). First in US search order. The US list serves every disc whose security byte is neither 0x64 nor 0xa1 (pico/cd/cd_image.c:190, 247-248)."
|
|
source_ref: "source platform/libretro/libretro.c:1273"
|
|
|
|
- name: "SegaCDBIOS9303.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [north-america, latin-america]
|
|
priority: 2
|
|
required: false
|
|
size: 131072
|
|
note: "US Sega CD BIOS (March 1993). Second in US search order."
|
|
source_ref: "source platform/libretro/libretro.c:1273"
|
|
|
|
- name: "us_scd1_9210.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [north-america, latin-america]
|
|
priority: 3
|
|
required: false
|
|
size: 131072
|
|
note: "US Sega CD Model 1 BIOS (October 1992). Third in US search order."
|
|
source_ref: "source platform/libretro/libretro.c:1273"
|
|
|
|
- name: "bios_CD_U.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [north-america, latin-america]
|
|
priority: 4
|
|
required: false
|
|
size: 131072
|
|
note: "US Sega CD BIOS (generic name). Last in US search order."
|
|
source_ref: "source platform/libretro/libretro.c:1273"
|
|
|
|
# -------------------------------------------------------
|
|
# Mega CD / Sega CD - EU region
|
|
# -------------------------------------------------------
|
|
- name: "eu_mcd2_9306.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [europe, oceania]
|
|
priority: 1
|
|
required: true
|
|
size: 131072
|
|
note: "EU Mega CD Model 2 BIOS (June 1993). First in EU search order, used when security byte 0x20b is 0x64, the only PAL branch for Australian discs (pico/media.c:243-247, platform/libretro/libretro.c:1306-1308)."
|
|
source_ref: "source platform/libretro/libretro.c:1276"
|
|
|
|
- name: "eu_mcd2_9303.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [europe, oceania]
|
|
priority: 2
|
|
required: false
|
|
size: 131072
|
|
note: "EU Mega CD Model 2 BIOS (March 1993). Second in EU search order."
|
|
source_ref: "source platform/libretro/libretro.c:1276"
|
|
|
|
- name: "eu_mcd1_9210.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [europe, oceania]
|
|
priority: 3
|
|
required: false
|
|
size: 131072
|
|
note: "EU Mega CD Model 1 BIOS (October 1992). Third in EU search order."
|
|
source_ref: "source platform/libretro/libretro.c:1276"
|
|
|
|
- name: "bios_CD_E.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [europe, oceania]
|
|
priority: 4
|
|
required: false
|
|
size: 131072
|
|
note: "EU Mega CD BIOS (generic name). Last in EU search order."
|
|
source_ref: "source platform/libretro/libretro.c:1276"
|
|
|
|
# -------------------------------------------------------
|
|
# Mega CD / Sega CD - JP region
|
|
# -------------------------------------------------------
|
|
- name: "jp_mcd2_921222.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [japan]
|
|
priority: 1
|
|
required: true
|
|
size: 131072
|
|
note: "JP Mega CD Model 2 BIOS (December 1992). First in JP search order."
|
|
source_ref: "source platform/libretro/libretro.c:1279"
|
|
|
|
- name: "jp_mcd1_9112.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [japan]
|
|
priority: 2
|
|
required: false
|
|
size: 131072
|
|
note: "JP Mega CD Model 1 BIOS (December 1991). Second in JP search order."
|
|
source_ref: "source platform/libretro/libretro.c:1279"
|
|
|
|
- name: "jp_mcd1_9111.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [japan]
|
|
priority: 3
|
|
required: false
|
|
size: 131072
|
|
note: "JP Mega CD Model 1 BIOS (November 1991). Third in JP search order."
|
|
source_ref: "source platform/libretro/libretro.c:1279"
|
|
|
|
- name: "bios_CD_J.bin"
|
|
system: sega-megacd
|
|
variant_group: "mega-cd-bios"
|
|
region: [japan]
|
|
priority: 4
|
|
required: false
|
|
size: 131072
|
|
note: "JP Mega CD BIOS (generic name). Last in JP search order."
|
|
source_ref: "source platform/libretro/libretro.c:1279"
|
|
|
|
# -------------------------------------------------------
|
|
# Sega 32X - HLE available, no frontend loads these
|
|
# -------------------------------------------------------
|
|
- name: "32X_G_BIOS.BIN"
|
|
system: sega-32x
|
|
required: false
|
|
hle_fallback: true
|
|
size: 256 # 0x100
|
|
note: "32X 68K (Genesis-side) BIOS. HLE replacement generated when NULL."
|
|
source_ref: "source pico/32x/memory.c:2208-2245"
|
|
|
|
- name: "32X_M_BIOS.BIN"
|
|
system: sega-32x
|
|
required: false
|
|
hle_fallback: true
|
|
size: 2048 # 0x800
|
|
note: "32X Master SH2 BIOS. HLE replacement generated when NULL."
|
|
source_ref: "source pico/32x/memory.c:2251-2278"
|
|
|
|
- name: "32X_S_BIOS.BIN"
|
|
system: sega-32x
|
|
required: false
|
|
hle_fallback: true
|
|
size: 1024 # 0x400
|
|
note: "32X Slave SH2 BIOS. HLE replacement generated when NULL."
|
|
source_ref: "source pico/32x/memory.c:2281-2299"
|
|
|
|
platform_details:
|
|
megacd:
|
|
bios_size: 131072 # 128 KB
|
|
hle_available: false
|
|
region_specific: true
|
|
extensions_tried: [".bin", ".zip"]
|
|
source_ref: "pico/pico_int.h:559, platform/libretro/libretro.c:1317-1325"
|
|
|
|
32x:
|
|
m68k_bios_size: 256 # 0x100
|
|
master_sh2_bios_size: 2048 # 0x800
|
|
slave_sh2_bios_size: 1024 # 0x400
|
|
hle_available: true
|
|
source_ref: "pico/pico.h:54-55, pico/pico_int.h:679-693"
|
|
|
|
sms:
|
|
hle_available: true
|
|
note: "No BIOS file loaded. VDP/RAM initialized to post-BIOS state."
|
|
source_ref: "pico/sms.c:1080-1097"
|