mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-04-13 12:22:33 -05:00
cda012b10a
dosbox/dosbox_pure: added validation: [sha1, size] to MT-32 ROM entries — MUNT rejects unrecognized SHA1 (ROMInfo.cpp:171-180). duckstation: fixed BIOS count to 105 (24 PS1 + 80 PS2 + 1 OpenBIOS). added exclusion_note to 6 profiles with files: [] (dosbox_svn, dosbox_svn_ce, doukutsu_rs, emux_chip8, emux_nes, fake08).
53 lines
1.7 KiB
YAML
53 lines
1.7 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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core_version: "0.1"
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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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