if (strlen (code) != 9 || *(code + 4) != '-' || !S9xAllHex (code, 4) ||
!S9xAllHex (code + 5, 4))
return ("Invalid Game Genie(tm) code - should be 'xxxx-xxxx'.");
if (strlen (code) != 9 || *(code + 4) != '-' || !S9xAllHex (code, 4) ||
!S9xAllHex (code + 5, 4))
return ("Invalid Game Genie(tm) code - should be 'xxxx-xxxx'.");