Yamaha YIS-503II 1985 Like CX5MII, but without SFG module. MSX jp 16000 jp_ansi false false true V9938 16 YM2149 21000 true yis503ii_basic_bios1.rom 4d0c37ad722366ac7aa3d64291c3db72884deb2d eJz7z/B/QOEAW/8fAASAf4E=