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https://github.com/Abdess/retroarch_system.git
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Abdessamad Derraz
ee2332b799
Held back by the skip until now. Each libretro core is built by the buildbot from its default branch.
39 lines
1.6 KiB
YAML
39 lines
1.6 KiB
YAML
emulator: Beetle WonderSwan (Mednafen WonderSwan)
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type: libretro
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core_classification: pure_libretro
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source: "https://github.com/libretro/beetle-wswan-libretro"
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upstream: "https://mednafen.github.io/"
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profiled_date: "2026-03-24"
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source_commit: "4b01295838ea89e3f1355bbe4cb5cf98aa6108cd"
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core_version: "v0.9.35.1"
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display_name: "Bandai - WonderSwan/Color (Beetle Wonderswan)"
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cores: [beetle_wswan, mednafen_wswan, "beetle-wswan"]
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systems: [bandai-wswan, bandai-wswanc]
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notes: |
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Beetle WonderSwan is a fork of Mednafen's Cygne module for WonderSwan
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and WonderSwan Color emulation via libretro.
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No external BIOS or firmware files are required. The core bypasses the
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original boot ROM entirely by hardcoding the initial I/O register state
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in mednafen/wswan/start.inc (a 256-byte table of power-on defaults for
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all hardware registers 0x00-0xFF). On reset, WSwan_MemoryReset() in
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wswan-memory.c zeroes RAM and writes a fixed 8-byte identifier at
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0x75AC, then the CPU starts executing the cartridge directly.
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Internal EEPROM owner data (name, birthday, sex, blood type) is
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configured through core options (wswan.name, wswan.byear, wswan.bmonth,
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wswan.bday, wswan.sex, wswan.blood) and initialized at boot by
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WSwan_EEPROMInit() without needing a real EEPROM dump.
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The wswan.language core option selects English or Japanese, which is
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returned via I/O port 0xC8+ as the hardware language flag. This
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replaces the boot ROM's language selection screen.
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The NEC V30MZ CPU is emulated in software (v30mz.c). Sound DMA,
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cartridge banking, and RTC are all handled internally.
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ROM extensions: .ws, .wsc, .pc2
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files: []
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