mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-11-01 07:33:45 -06:00
Abdessamad Derraz
e7aa9e870b
Each libretro profile records version_basis and core_version is read there at its pin. snes9x states 1.63 in snes9x.h, nestopia 2.0.0, mgba 0.11.0, vice 3.10, atari800's libretro tree 7.0.0. Cores whose build takes its version from git carry the nearest tag in describe form (flycast v2.7-90-ge88b0ce, ppsspp, duckstation, gearcoleco), placeholders copied from .info files (Git, SVN) are replaced by the code's statement, and a code that states none is null with kind none.
58 lines
1.8 KiB
YAML
58 lines
1.8 KiB
YAML
emulator: "emux (NES)"
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type: libretro
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core_classification: official_port
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source: "https://github.com/libretro/emux"
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upstream: "https://github.com/sronsse/emux"
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profiled_date: "2026-03-23"
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source_commit: "3e558cb15157fcb1944846a845547d369605c963"
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core_version: "0.1"
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version_basis:
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kind: file
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path: "configure.ac"
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pattern: 'AC_INIT\(\[emux\],\s+\[([0-9][\w.+-]*)'
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display_name: "Nintendo - NES / Famicom (Emux NES)"
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cores:
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- emux_nes
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systems:
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- nes
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notes: |
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emux is a multi-system emulator by Sebastien Ronsse, supporting CHIP-8,
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Game Boy, NES, and Sega Master System as separate libretro cores.
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The NES core does not require any BIOS or firmware files.
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The .info declares no firmware_count.
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The NES has no boot ROM. CPU starts at the reset vector address
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stored at 0xFFFC-0xFFFD (cpu/rp2a03.c RESET_VECTOR).
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Cartridge loading in controllers/mapper/nes_mapper.c:
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- iNES header parsed (magic 0x1A53454E)
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- Mapper number extracted from flags6/flags7
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- Supported mappers: NROM (0), MMC1 (1), MMC3 (4)
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- PRG-ROM and CHR-ROM mapped via file_map(PATH_DATA, ...)
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Memory map from mach/nes.c:
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CPU bus:
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0x0000-0x07FF WRAM (2 KB, mirrored to 0x1FFF)
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0x2000-0x2007 PPU registers (mirrored to 0x3FFF)
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0x4000-0x4013 APU registers
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0x4014 Sprite DMA
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0x4016-0x4017 Controller ports
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0x6000-0x7FFF SRAM
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0x8000-0xFFFF PRG-ROM
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PPU bus:
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0x0000-0x1FFF CHR-ROM/RAM (pattern tables)
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0x2000-0x2FFF VRAM (nametables, 4 KB)
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0x3F00-0x3F1F Palette RAM
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system_directory obtained via RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY
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(libretro/libretro.c:23-25) but not used for any file loading.
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is_experimental=true. No save states, rewind, or netplay support.
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Supported extensions: nes, bin, rom.
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exclusion_note: "NES has no boot ROM, CPU starts at reset vector from cartridge"
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files: []
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