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.
145 lines
4.7 KiB
YAML
145 lines
4.7 KiB
YAML
emulator: NeoCD
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type: libretro
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source: "https://github.com/libretro/neocd_libretro"
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profiled_date: "2026-03-18"
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core_version: "2019"
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display_name: "SNK - Neo Geo CD (NeoCD)"
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systems:
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- snk-neogeo-cd
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notes: |
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NeoCD is a dedicated SNK Neo Geo CD emulator. It supports Front Loader,
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Top Loader, and CDZ hardware variants. BIOS files go in {system_dir}/neocd/
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subdirectory (src/path.cpp:7, src/libretro_bios.cpp:76-81).
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The core scans the neocd/ directory for any .rom or .bin file (also inside
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.zip archives), reads the first 512 bytes, and identifies the BIOS type by
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binary pattern matching at fixed ROM addresses (src/bios.cpp:168-208).
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Filenames listed in the .info are conventional but not enforced by the core.
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Three hardware families are detected: Front Loader (NeoCD), Top Loader
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(NeoCD), and CDZ. Modified BIOS variants are also recognized: SMKDan 0.07,
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SMKDan 0.07b, Universe BIOS 3.2, and Universe BIOS 3.3. The core applies
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speed hack patches and CD recognition patches at load time for each type
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(src/bios.cpp:209-280).
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The Y-ZOOM ROM (ng-lo.rom / 000-lo.lo) is a sprite zoom lookup table loaded
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separately (src/memory.h:22, YZOOMROM_SIZE = 0x10000 = 65536 bytes). It is
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optional but improves sprite scaling accuracy.
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All firmware entries are marked optional in the .info (any single valid BIOS
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is sufficient). The core presents detected BIOSes as a dropdown in the core
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options menu, sorted alphabetically by description.
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BIOS ROM size: 524288 bytes (0x80000, src/memory.h:16).
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Y-ZOOM ROM size: 65536 bytes (0x10000, src/memory.h:22).
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files:
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# Front Loader BIOS (NeoCD original front-loading unit)
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- name: neocd_f.rom
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dest: neocd/neocd_f.rom
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "Front Loader BIOS, official NeoCD format"
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source_ref: "retroarch/libneocd_libretro.info:15 (firmware0)"
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# Front Loader BIOS, SMKDan custom
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- name: neocd_sf.rom
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dest: neocd/neocd_sf.rom
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "Front Loader BIOS, SMKDan custom"
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source_ref: "retroarch/libneocd_libretro.info:18 (firmware1)"
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# Top Loader BIOS (NeoCD top-loading unit)
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- name: neocd_t.rom
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dest: neocd/neocd_t.rom
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "Top Loader BIOS, official NeoCD format"
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source_ref: "retroarch/libneocd_libretro.info:21 (firmware2)"
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# Top Loader BIOS, SMKDan custom
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- name: neocd_st.rom
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dest: neocd/neocd_st.rom
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "Top Loader BIOS, SMKDan custom"
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source_ref: "retroarch/libneocd_libretro.info:24 (firmware3)"
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# CDZ BIOS (Neo Geo CDZ, last revision)
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- name: neocd_z.rom
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dest: neocd/neocd_z.rom
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "CDZ BIOS, official NeoCD format"
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source_ref: "retroarch/libneocd_libretro.info:27 (firmware4)"
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# CDZ BIOS, SMKDan custom
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- name: neocd_sz.rom
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dest: neocd/neocd_sz.rom
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "CDZ BIOS, SMKDan custom"
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source_ref: "retroarch/libneocd_libretro.info:30 (firmware5)"
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# Y-ZOOM ROM (sprite zoom lookup table)
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- name: ng-lo.rom
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dest: neocd/ng-lo.rom
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system: snk-neogeo-cd
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required: false
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size: 65536
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note: "Y-ZOOM ROM, NeoCD format"
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source_ref: "retroarch/libneocd_libretro.info:33 (firmware6)"
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# Y-ZOOM ROM, MAME naming
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- name: 000-lo.lo
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dest: neocd/000-lo.lo
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system: snk-neogeo-cd
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required: false
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size: 65536
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note: "Y-ZOOM ROM, MAME naming (same content as ng-lo.rom)"
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source_ref: "retroarch/libneocd_libretro.info:36 (firmware7)"
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# Front Loader BIOS, MAME naming
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- name: front-sp1.bin
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dest: neocd/front-sp1.bin
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "Front Loader BIOS, MAME naming (same content as neocd_f.rom)"
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source_ref: "retroarch/libneocd_libretro.info:39 (firmware8)"
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# Top Loader BIOS, MAME naming
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- name: top-sp1.bin
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dest: neocd/top-sp1.bin
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "Top Loader BIOS, MAME naming (same content as neocd_t.rom)"
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source_ref: "retroarch/libneocd_libretro.info:42 (firmware9)"
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# CDZ BIOS, MAME naming
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- name: neocd.bin
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dest: neocd/neocd.bin
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "CDZ BIOS, MAME naming (same content as neocd_z.rom)"
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source_ref: "retroarch/libneocd_libretro.info:45 (firmware10)"
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# Universe BIOS for CD systems
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- name: uni-bioscd.rom
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dest: neocd/uni-bioscd.rom
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system: snk-neogeo-cd
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required: false
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size: 524288
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note: "Universe BIOS CD, third-party multi-region BIOS (hack)"
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source_ref: "retroarch/libneocd_libretro.info:48 (firmware11)"
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