mirror of
https://github.com/Abdess/retroarch_system.git
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Every profile now has: - profiled_date: date of source code analysis - core_version: version from libretro-core-info .info files - display_name: human-readable name from .info files 260/260 profiles complete. 294/294 libretro cores covered. Standalone emulators (cemu, rpcs3, xemu, vita3k) versioned manually.
59 lines
2.0 KiB
YAML
59 lines
2.0 KiB
YAML
emulator: ProSystem
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type: libretro
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source: "https://github.com/libretro/prosystem-libretro"
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profiled_date: "2026-03-18"
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core_version: "1.3e"
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display_name: "Atari - 7800 (ProSystem)"
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cores:
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- prosystem
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systems:
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- atari-7800
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notes: |
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ProSystem is an Atari 7800 emulator ported to libretro.
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BIOS loading is in core/libretro.c:579-588. Region is read from the
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cartridge header byte 57 (core/Cartridge.c:214) or overridden by the
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internal database (core/Database.c). PAL carts get the (E) BIOS,
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everything else gets (U).
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Both BIOS files are optional. The core runs games without them, but
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some titles may have compatibility issues without the real BIOS
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(startup encryption check, etc). bios_Store() maps the BIOS data
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into the top of the 64K address space (65536 - bios_size).
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No core option controls BIOS loading -- if the file exists in the
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system directory, it is loaded automatically.
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files:
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- name: "7800 BIOS (U).rom"
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system: atari-7800
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required: false
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size: 4096 # 4 KB
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note: "NTSC/US Atari 7800 BIOS. Loaded when cartridge_region != REGION_PAL."
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source_ref: "core/libretro.c:585"
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- name: "7800 BIOS (E).rom"
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system: atari-7800
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required: false
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size: 16384 # 16 KB (PAL BIOS is larger than NTSC)
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note: "PAL/EU Atari 7800 BIOS. Loaded when cartridge_region == REGION_PAL."
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source_ref: "core/libretro.c:583"
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platform_details:
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bios_mapping:
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target: "top of 64K memory (65536 - bios_size)"
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source_ref: "core/Bios.c:88"
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notes: |
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bios_Store() writes the BIOS into ROM at address (65536 - bios_size).
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The BIOS size is read dynamically from the file, not hardcoded.
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bios_enabled flag is set only if bios_Load() succeeds (file found
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and read without error).
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region_detection:
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source_ref: "core/Cartridge.c:214, core/Database.c"
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notes: |
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Region byte is at offset 57 in the A7800 cartridge header.
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The internal database (Database.c) can override the header value.
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REGION_NTSC = 0, REGION_PAL = 1 (defined in Region.h).
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