mirror of
https://github.com/Abdess/retroarch_system.git
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Abdessamad Derraz
b3b3880c19
Profiles that read two repositories, a libretro port and its upstream, now prefix each citation with source or upstream, decided by which tree carries the cited value at its pin. The emulator pages use the word to tell libretro glue, emulator code as the port carries it, and the upstream emulator apart.
126 lines
5.4 KiB
YAML
126 lines
5.4 KiB
YAML
emulator: xemu Chihiro
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type: standalone
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core_classification: community_fork
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source: "https://github.com/Tovarichtch/xemu"
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source_branch: perf-experimental
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upstream: "https://github.com/xemu-project/xemu"
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profiled_date: "2026-10-20"
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source_commit: "0d44d803b2ad22c26c907844fe81d40fbd6ffdfa"
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core_version: "0.8.134-406-g0d44d803b2"
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display_name: "Sega - Chihiro (xemu Chihiro)"
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cores:
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- xemu-chihiro
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systems:
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- sega-chihiro
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mode: standalone
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notes: |
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Tovarichtch's fork of xemu that adds the Sega Chihiro machine: the media
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board, the AN2131 and its 8051 firmware, JVS, the drive boards, the card
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readers and the network board. RetroBat ships the build whose version string
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is 0.8.134-406-g0d44d803b2, the "Source code release and playtest v2" commit
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this profile is pinned to, on the perf-experimental branch
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(the one with the fork's NV2A and CPU work). Batocera builds the same fork at a later commit.
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RetroBat runs this emulator only as a Chihiro: the launcher sets the Chihiro
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path whenever the emulator is xemu-chihiro. It writes chihiro.roms.bios_path
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as bios/chihiro/chihiro_xbox_bios.bin, else bios/chihiro_xbox_bios.bin, and
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clears the media board and EEPROM paths so the emulator takes them from the
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folder of the BIOS.
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ref: emulatorLauncher Generators/Xemu.Generator.cs:48, 413-444
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A Chihiro boots its own BIOS only, never the Xbox flash or MCPX boot ROM set
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for the Xbox machine: the Chihiro BIOS is an MCPX X2 image with its boot ROM
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built in. The BIOS must be 512 KiB with the SHA-1 MAME lists, else the
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machine stays paused with an error.
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ref: system/vl.c:3110-3135, 3169-3190, hw/xbox/chihiro/chihiro.c:2280-2292
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The media board flash and the three serial EEPROMs come from the settings
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when set, else from the folder of the BIOS. The flash is tried as
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fpr21042_m29w160et.bin, fpr-23887_29lv160te.ic4, then fpr-23887.bin, each in
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that folder and then in its parent, and any size up to 4 MiB is read. The
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EEPROMs must have their exact size or they count as absent. Any of the five
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files missing keeps the machine paused with a message naming it.
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ref: hw/xbox/chihiro/chihiro.c:2259-2401, system/vl.c:3195-3241
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The Xbox EEPROM is not a file to supply for a Chihiro: chihiro_eeprom.bin is
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generated with the debug key in the data directory and written back. The VM
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snapshots, the per game saves, the DIMM system area and the card images are
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written by the emulator too. Booting an Xbox disc with this build reads the
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same files as upstream xemu (emulators/xemu.yml), which RetroBat never asks
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it to do.
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ref: system/vl.c:2978-3001
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The network firmware of the DIMM board is read only from the setting
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chihiro.roms.net_firmware_path, which RetroBat does not write. Without it the
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board reports version 3.17. Linked cabinets need it to run the network board,
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and network titles check the version it reports (OutRun 2 SP, Gundam).
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ref: hw/xbox/chihiro/chihiro.c:363-400, 491-513, config_spec.yml:908-915
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files:
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- name: chihiro_xbox_bios.bin
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path: "chihiro/chihiro_xbox_bios.bin"
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system: sega-chihiro
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required: true
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size: 524288
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sha1: "b700b0041af8f84835e45d1d1250247bf7077188"
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validation: [size, sha1]
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description: "Chihiro BIOS"
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note: "RetroBat also looks for it at the root of the bios folder. The other Chihiro files are then read from the same folder."
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source_ref: "source hw/xbox/chihiro/chihiro.c:2280-2292, source system/vl.c:3169-3190"
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- name: fpr21042_m29w160et.bin
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path: "chihiro/fpr21042_m29w160et.bin"
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system: sega-chihiro
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required: true
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max_size: 4194304
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validation: [size]
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description: "Media board flash ROM (SEGABOOT)"
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note: "First of the three names tried. The SEGABOOT version is read from the second megabyte and the board serial from the MBDT header at 0xFFE00."
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source_ref: "source hw/xbox/chihiro/chihiro.c:2259-2333, 485-489, source system/vl.c:3201-3214"
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- name: fpr-23887_29lv160te.ic4
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path: "chihiro/fpr-23887_29lv160te.ic4"
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system: sega-chihiro
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required: false
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max_size: 4194304
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validation: [size]
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aliases: [fpr-23887.bin]
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description: "Media board flash ROM, later revision"
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note: "Read in place of fpr21042_m29w160et.bin when that one is absent, under either name."
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source_ref: "source hw/xbox/chihiro/chihiro.c:2320-2332"
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- name: ic10_g24lc64.bin
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path: "chihiro/ic10_g24lc64.bin"
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system: sega-chihiro
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required: true
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size: 8192
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validation: [size]
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description: "Base board QC EEPROM"
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source_ref: "source hw/xbox/chihiro/chihiro.c:2336-2401, source system/vl.c:3215-3217"
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- name: pc20_g24lc64.bin
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path: "chihiro/pc20_g24lc64.bin"
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system: sega-chihiro
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required: true
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size: 8192
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validation: [size]
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description: "Base board SC EEPROM"
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source_ref: "source hw/xbox/chihiro/chihiro.c:2336-2401, source system/vl.c:3218-3220"
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- name: ic11_24lc024.bin
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path: "chihiro/ic11_24lc024.bin"
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system: sega-chihiro
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required: true
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size: 128
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validation: [size]
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description: "Base board configuration EEPROM"
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source_ref: "source hw/xbox/chihiro/chihiro.c:2336-2401, source system/vl.c:3221-3223"
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- name: ver1305.bin
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system: sega-chihiro
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required: false
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description: "DIMM board network firmware 13.05"
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note: "Opened only from the path set in the settings. Its version is the word after the FIRM_VERSION is here! mark."
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source_ref: "source hw/xbox/chihiro/chihiro.c:363-400, 491-513, source hw/xbox/chihiro/chihiro-netboard.c:1257-1270"
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