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feat: add the jgenesis PC Engine CD System Card
A disc image runs the configured System Card ROM and refuses to load without one (mainloop/pce.rs:29-50). The default Arcade Card wants a v3.0 ROM. Pin moved to d41e2d9, core_version 0.14.1 as Cargo.toml already read at the old pin.
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Abdessamad Derraz committed
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+35
-18
@@ -4,8 +4,8 @@ core_classification: other
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source: "https://github.com/jsgroth/jgenesis"
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upstream: "https://github.com/jsgroth/jgenesis"
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profiled_date: "2026-08-08"
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source_commit: "db1bec7392704aa0ecc2bbbb5ac751fec3c485a0"
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core_version: "0.14.0"
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source_commit: "d41e2d975771c78ee2efe80f8ec5768b87e3f7eb"
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core_version: "0.14.1"
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display_name: "Multi-System (jgenesis)"
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cores:
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- jgenesis
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@@ -22,18 +22,20 @@ systems:
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- nintendo-gbc
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- nintendo-gba
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- nec-pc-engine
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- nec-pc-engine-cd
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mode: standalone
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notes: |
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Multi-system emulator written in Rust by James Groth. One binary covers
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thirteen hardware modes: Master System, Game Gear, SG-1000, Genesis, Sega CD,
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32X, Sega CD 32X, NES, SNES, Game Boy, Game Boy Color, Game Boy Advance and
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PC Engine (frontend/jgenesis-native-driver/src/extensions.rs:172-187).
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PC Engine (frontend/jgenesis-native-driver/src/extensions.rs:178-193).
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No path is hardcoded. Every BIOS, boot ROM and coprocessor ROM is an
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Option<PathBuf> in the config, defaulting to None and set through a file
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dialog or the TOML config file (frontend/jgenesis-native-driver/src/config.rs
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:76-78,95-99,146-159,191-193,205). The emulator identifies these files by
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dialog or the TOML config file
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(frontend/jgenesis-native-driver/src/config.rs:78-81,97-102,149-162,193-196,207-208,222-223).
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The emulator identifies these files by
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size and layout, never by name or hash, so the names below are the ones the
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dumps circulate under rather than strings read from the source. RetroBat
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writes bios_CD_U/E/J.bin and gba_bios.bin into the TOML directly
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@@ -41,8 +43,8 @@ notes: |
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Sega CD selects the BIOS by disc region and per_region_bios defaults to true,
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so the US, European and Japanese images are each reachable
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(frontend/jgenesis-native-driver/src/mainloop/genesis.rs:215-244,
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frontend/jgenesis-native-config/src/genesis.rs:117). Setting "Use US BIOS for
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(frontend/jgenesis-native-driver/src/mainloop/genesis.rs:211-240,
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frontend/jgenesis-native-config/src/genesis.rs:119). Setting "Use US BIOS for
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all regions" collapses all three onto the US slot.
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SNES coprocessor ROMs use the merged layout, program ROM followed by data ROM
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@@ -59,8 +61,13 @@ notes: |
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compiled into the binary (backend/s32x-core/src/bootrom.rs:3-6). A Sega CD
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BIOS is only consulted when the hardware mode is Sega CD or Sega CD 32X.
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NES, SG-1000 and PC Engine need no BIOS. PC Engine has no CD-ROM² support, so
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no System Card is involved. CX4, SA-1, S-DD1, SPC7110, Super FX, OBC1 and the
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NES, SG-1000 and PC Engine HuCards need no BIOS. A disc image switches the PC
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Engine to CD-ROM² mode, which runs the configured System Card ROM in place of
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a HuCard and refuses to start without one
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(frontend/jgenesis-native-driver/src/mainloop/pce.rs:29-50). The card model
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defaults to the Arcade Card, which wants a v3.0 System Card ROM
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(config/pce-config/src/lib.rs:60-65, frontend/jgenesis-gui/src/app/pce/helptext.rs:11-25).
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CX4, SA-1, S-DD1, SPC7110, Super FX, OBC1 and the
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S-RTC are emulated from cartridge data alone and take no firmware file.
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Written by the emulator, not obtained: save files, save states, the per-game
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@@ -81,7 +88,7 @@ files:
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required: true
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size: 131072
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validation: [size]
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/genesis.rs:39-49 (read), frontend/jgenesis-native-driver/src/mainloop/genesis.rs:238-244 (bios_path_for_region), backend/segacd-core/src/api.rs:77-79 (BIOS_LEN check)"
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/genesis.rs:43-53 (read), frontend/jgenesis-native-driver/src/mainloop/genesis.rs:234-240 (bios_path_for_region), backend/segacd-core/src/api.rs:77-79 (BIOS_LEN check)"
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note: "Selected when the disc region is Americas, and for every region when per_region_bios is off."
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- name: "bios_CD_E.bin"
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@@ -91,8 +98,8 @@ files:
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required: true
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size: 131072
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validation: [size]
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/genesis.rs:238-244 (eu_bios_path), backend/segacd-core/src/api.rs:77-79"
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note: "Selected when the header area at 0x1F0 holds E and not U or J, as Australian discs do (backend/genesis-components/src/cartridge.rs:361-376, backend/segacd-core/src/api.rs:339-369)."
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/genesis.rs:234-240 (eu_bios_path), backend/segacd-core/src/api.rs:77-79"
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note: "Selected when the header area at 0x1F0 holds E and not U or J, as Australian discs do (backend/genesis-components/src/cartridge.rs:362-377, backend/segacd-core/src/api.rs:339-369)."
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- name: "bios_CD_J.bin"
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system: sega-megacd
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@@ -101,7 +108,7 @@ files:
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required: true
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size: 131072
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validation: [size]
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/genesis.rs:238-244 (jp_bios_path), backend/segacd-core/src/api.rs:77-79"
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/genesis.rs:234-240 (jp_bios_path), backend/segacd-core/src/api.rs:77-79"
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# -------------------------------------------------------
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# Game Boy Advance
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@@ -112,7 +119,7 @@ files:
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required: true
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size: 16384
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validation: [size]
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/gba.rs:29-33 (GbaNoBios), backend/gba-core/src/memory.rs:10,102-107 (BIOS_ROM_LEN check)"
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/gba.rs:32-36 (GbaNoBios), backend/gba-core/src/memory.rs:10, 102-107 (BIOS_ROM_LEN check)"
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note: "Every GBA load fails without it. skip_bios_animation only skips the intro, the BIOS is still mapped and read for SWI calls."
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# -------------------------------------------------------
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@@ -178,6 +185,16 @@ files:
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source_ref: "backend/snes-core/src/memory/cartridge.rs:310-320 (MissingSt018Rom), backend/snes-coprocessors/src/st018.rs:18-22,346-352 (TOTAL_ROM_LEN check)"
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note: "0x20000 program plus 0x8000 data. Used by Hayazashi Nidan Morita Shougi 2. Files larger than the expected length are accepted, shorter ones are rejected."
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# -------------------------------------------------------
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# PC Engine CD-ROM²
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# -------------------------------------------------------
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- name: "syscard3.pce"
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system: nec-pc-engine-cd
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description: "Super CD-ROM² System Card 3.0"
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required: true
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/pce.rs:29-50 (PceCdNoBios), frontend/jgenesis-native-config/src/pce.rs:15, 44, backend/pce-core/src/cartridge.rs:84-101, config/pce-config/src/lib.rs:60-65"
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note: "Every disc fails to load without it. One slot accepts any System Card dump, no size or content check, but the default Arcade Card and the Super System Card need a v3.0 ROM. A file over 512 KiB is mapped as a plain HuCard."
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# -------------------------------------------------------
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# Master System / Game Gear
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# -------------------------------------------------------
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@@ -185,14 +202,14 @@ files:
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system: sega-mastersystem
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description: "Master System BIOS"
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required: false
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/smsgg.rs:27-33,50-56,74-80,112-122, backend/smsgg-core/src/memory.rs:101-106,148-168"
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/smsgg.rs:26-32, 49-55, 73-79, 116-126, backend/smsgg-core/src/memory.rs:101-106, 148-168"
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note: "Read only when sms_boot_from_bios is enabled or the emulator runs without a cartridge, both off by default. One slot accepts any regional dump, no size or content check."
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- name: "bios.gg"
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system: sega-gamegear
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description: "Game Gear BIOS"
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required: false
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/smsgg.rs:27-33,50-56,74-80,112-122"
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/smsgg.rs:26-32, 49-55, 73-79, 116-126"
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note: "Read only when gg_boot_from_bios is enabled or the emulator runs without a cartridge, both off by default."
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# -------------------------------------------------------
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@@ -204,7 +221,7 @@ files:
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required: false
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size: 256
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validation: [size]
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/gb.rs:29-33,77-89, backend/gb-core/src/memory.rs:9,45-63 (DMG_BOOT_ROM_LEN check)"
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/gb.rs:32-36, 78-90, backend/gb-core/src/memory.rs:9, 45-63 (DMG_BOOT_ROM_LEN check)"
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note: "Loaded only when dmg_boot_rom is enabled, off by default. Without it the CPU starts post-boot."
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- name: "cgb_boot.bin"
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@@ -214,7 +231,7 @@ files:
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min_size: 2048
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max_size: 2304
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validation: [size]
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/gb.rs:34-38, 77-89, backend/gb-core/src/memory.rs:10, 45-63, backend/gb-core/src/memory.rs:164 (CGB_BOOT_ROM_LEN check and pad_cgb_boot_rom)"
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source_ref: "frontend/jgenesis-native-driver/src/mainloop/gb.rs:37-41, frontend/jgenesis-native-driver/src/mainloop/gb.rs:78-90, backend/gb-core/src/memory.rs:10, 45-63, backend/gb-core/src/memory.rs:164 (CGB_BOOT_ROM_LEN check and pad_cgb_boot_rom)"
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note: "Loaded only when cgb_boot_rom is enabled, off by default. 2304 bytes is taken as is, 2048 bytes gets the filler page inserted."
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# -------------------------------------------------------
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