mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-10-24 12:49:03 -05:00
Abdessamad Derraz
8458e92281
Every cited block was read again at HEAD: no ref left to review, no file name or hash literal added to a cited file since the pin (--detect-new-files --watch-hashes), refs recaled with their pins. Profiles built by a platform at a fixed commit, or whose bump would leave prose under an older pin, stay where they were.
127 lines
5.5 KiB
YAML
127 lines
5.5 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: "98fbd75dd0f3088a4988abc1698feb37b844a41a"
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upstream_commit: "25e1ee2fd59a451f2ab57e825b4f8a5414220c8b"
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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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