mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-04-13 12:22:33 -05:00
8768aed7aa
freechaf (Channel F, 3 ROMs), freeintv (Intellivision, exec+grom), ep128emu (Enterprise/TVC/CPC/ZX, 22 ROMs all built-in), kronos (Saturn + 14 ST-V blobs), gambatte (GB/GBC boot ROMs), mgba (GBA/GB/GBC/SGB, 10 CRC32 revisions), nestopia (FDS + NstDatabase), px68k (X68000, 6 ROMs in keropi/), fuse (ZX Spectrum, 17 machines), o2em (Odyssey2/Videopac, 4 BIOS by CRC32) 41 total profiles. Cross-reference: 644 undeclared, 167 in repo.
82 lines
2.9 KiB
YAML
82 lines
2.9 KiB
YAML
emulator: FreeChaF
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type: libretro
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source: "https://github.com/libretro/FreeChaF"
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cores:
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- freechaf
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systems:
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- fairchild-channelf
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notes: |
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FreeChaF is a Fairchild Channel F emulator ported to libretro.
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BIOS loading is in src/libretro.c:186-208. The core first tries to load
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sl90025.bin (Channel F II PSU1) at address 0x000. If that fails, it falls
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back to sl31253.bin (original Channel F PSU1) at the same address. PSU2
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(sl31254.bin) is always loaded at address 0x400.
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Memory layout from src/memory.h:27-30:
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0x000-0x3FF PSU1 ROM (sl31253 or sl90025)
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0x400-0x7FF PSU2 ROM (sl31254)
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0x800-0x1FFF cartridge ROM
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0x2000+ VRAM
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If either PSU ROM fails to load, the core switches to experimental HLE
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(high-level emulation) for that PSU. A warning message is shown to the
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user recommending real BIOS files. HLE state is tracked per-PSU via
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hle_state.psu1_hle and hle_state.psu2_hle (src/channelf_hle.c).
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The .info file declares all three firmware files as required (opt=false),
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but the core does not abort on missing BIOS -- it falls back to HLE.
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files:
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- name: "sl31253.bin"
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system: fairchild-channelf
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required: false
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md5: ac9804d4c0e9d07e33472e3726ed15c3
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size: 1024 # 1 KB, fills 0x000-0x3FF
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note: "Channel F PSU1 ROM (original). Fallback if sl90025.bin is missing."
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source_ref: "src/libretro.c:192"
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- name: "sl31254.bin"
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system: fairchild-channelf
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required: false
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md5: da98f4bb3242ab80d76629021bb27585
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size: 1024 # 1 KB, fills 0x400-0x7FF
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note: "Channel F PSU2 ROM. Always loaded at address 0x400."
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source_ref: "src/libretro.c:202"
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- name: "sl90025.bin"
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system: fairchild-channelf
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required: false
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md5: 95d339631d867c8f1d15a5f2ec26069d
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size: 1024 # 1 KB, fills 0x000-0x3FF
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note: "Channel F II PSU1 ROM. Tried first, preferred over sl31253.bin."
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source_ref: "src/libretro.c:186"
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platform_details:
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bios_mapping:
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target: "0x000-0x7FF in 64K memory space"
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source_ref: "src/memory.h:27-29, src/memory.c:30-61"
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notes: |
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MEMORY_loadSysROM_libretro() reads the file and copies it into
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Memory[] at the given address offset. PSU1 is loaded at 0x000,
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PSU2 at 0x400. The loader caps file size to (MEMORY_SIZE - address)
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to prevent overflow. MEMORY_RAMStart is advanced past the loaded
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ROM to protect it from writes.
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hle_fallback:
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source_ref: "src/channelf_hle.c"
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notes: |
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When BIOS files are missing, FreeChaF uses HLE to emulate the
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PSU routines in software. This is marked as experimental and may
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cause compatibility issues with some games. Each PSU can
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independently fall back to HLE.
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load_priority:
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source_ref: "src/libretro.c:186-198"
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notes: |
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PSU1 loading order: sl90025.bin (Channel F II) first, then
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sl31253.bin (original Channel F) as fallback. If both fail,
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HLE is used. sl90025.bin is the preferred BIOS as it includes
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Channel F II improvements.
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