install devkit pro https://github.com/devkitPro/installer/releases
Dump and Decrypt msx vc from WiiU
get msx.pkg from content/msx folder
rom 2 type slot1 and mega.rom
run ROMextract-MegaROM.bat or ROMextract-SLOT1.bat
extracted into ROMextracted/GAME.rom
test it fmsx emulator
bios dump
run BIOS DUMP.bat
extracted into BIOS folder
・FMBIOS.ROM
・MSX2PEXT.ROM
・MSX2P.ROM
only
https://github.com/yyoossk/WiiU-VC-MSX-ROM-BIOS-extractor/releases