mirror of
https://github.com/Abdess/retroarch_system.git
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d929424988
- Added profiled_date field to all 204 existing profiles for update tracking - Created 56 alias profiles for cores that share BIOS with a parent (e.g., mednafen_psx -> beetle_psx, fbalpha2012 -> fbneo) 260 total profiles covering all 294 libretro cores (204 unique + 56 alias).
35 lines
1.3 KiB
YAML
35 lines
1.3 KiB
YAML
emulator: Beetle NGP (Mednafen Neo Geo Pocket)
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type: libretro
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source: "https://github.com/libretro/beetle-ngp-libretro"
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profiled_date: "2026-03-18"
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systems: [snk-ngp, snk-ngpc]
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notes: |
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Beetle NGP is a fork of Mednafen's NeoPop module for Neo Geo Pocket
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and Neo Geo Pocket Color emulation via libretro.
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No external BIOS or firmware files are required. The core uses a
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built-in High-Level Emulation (HLE) BIOS that is constructed at
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runtime by bios_install() in mednafen/ngp/bios.c.
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The HLE BIOS populates a 64KB array (ngpc_bios[0x10000]) with:
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- A system call vector table at 0xFE00 (27 entries covering
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clock, RTC, interrupts, font, flash read/write, comms)
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- Each vector target contains an iBIOSHLE instruction (opcode 0x1F)
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that traps into biosHLE.c for high-level handling
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- A built-in system font (2048 bytes at 0x8DCF)
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- A default interrupt handler (RETI at 0x23DF)
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- An infinite loop at 0xFFFE as the idle entry point
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The TLCS-900h CPU (main) and Z80 (sound) are both emulated in
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software. Flash memory for game saves is handled internally via
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flash.c without needing a separate firmware dump.
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The only core option is ngp_language (english/japanese), which
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controls the language flag passed to games. It does not affect
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BIOS loading.
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ROM extensions: .ngp, .ngc, .ngpc, .npc
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files: []
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