mirror of
https://github.com/Abdess/retroarch_system.git
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26f2824259
source-verified core_classification, upstream URLs, validation fields, and hle_fallback flags. trimmed verbose notes. removed phantom files (azahar boot9/sector0x96). added bsnes2014 variant profiles.
45 lines
1.7 KiB
YAML
45 lines
1.7 KiB
YAML
emulator: a5200
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type: libretro
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core_classification: community_fork
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source: "https://github.com/libretro/a5200"
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upstream: "https://github.com/alekmaul/a5200"
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profiled_date: "2026-03-22"
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core_version: "2.0.2"
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display_name: "Atari - 5200 (a5200)"
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cores:
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- a5200
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systems:
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- atari-5200
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# Dedicated Atari 5200 emulator forked from Atari800 2.0.2 codebase by Alekmaul
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# for GCW Zero. Libretro port later enhanced by wavemotion-dave with Altirra OS
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# fallback, Super Cart support, frame blending and analog input.
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#
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# Loads 5200 OS ROM from <system_dir>/5200.rom (2048 bytes, mapped to 0xF800-0xFFFF
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# via MEMORY_InitialiseMachine). If missing or user selects "internal" via core
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# option "a5200_bios", falls back to built-in Altirra 5200 OS (altirra_5200_os.c,
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# compiled from Altirra-3.20-test4).
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#
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# BIOS loading (libretro.c:408-499):
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# 1. check_bios_variable() reads core option "a5200_bios" (official/internal)
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# 2. load_bios() reads <system_dir>/5200.rom, validates size == 0x800
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# 3. On failure or "internal" selected: memcpy from ROM_altirra_5200_os
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#
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# Upstream divergence: alekmaul's standalone requires 5200.rom (exits on missing).
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# Libretro port makes it optional via Altirra fallback.
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#
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# Cart type detection via MD5 database in cartridge.c (standard 4K-512K, bounty bob,
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# super cart, EE banked). Unknown ROMs detected by size heuristic.
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files:
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- name: "5200.rom"
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path: "5200.rom"
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size: 2048
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required: false
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hle_fallback: true
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validation: [size]
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note: >
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Atari 5200 OS ROM. Core option "a5200_bios" controls official vs internal.
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Altirra replacement has lower compatibility with some titles.
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source_ref: "libretro/libretro.c:58-59, libretro/libretro.c:408-499, emu/memory.c:46"
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