mirror of
https://github.com/Abdess/retroarch_system.git
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9eede1c957
blastem (MD, no BIOS needed), dosbox_pure (14 MT-32 ROMs + SF2), desmume (NDS, 3 files all HLE), cap32 (CPC, all embedded), mu (Palm OS, 5 ROMs), bk (Elektronika BK, 9 Soviet ROMs), gearsystem (SMS/GG, 2 optional boot ROMs), beetle_ngp (Neo Geo Pocket, pure HLE), beetle_wswan (WonderSwan, pure HLE), galaksija (Yugoslav computer, all embedded) 51 total profiles. Cross-reference: 658 undeclared, 177 in repo.
34 lines
1.3 KiB
YAML
34 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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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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