// This is bad--we're assuming that a bit is set in the last case. Might not be so!
// NOTE: values $7, B, D, & E are only legal ones for pad 0, (rows 3 to 0, in both cases)
// $E, D, B, & 7 are only legal ones for pad 1
// This is bad--we're assuming that a bit is set in the last case. Might not be so!
// NOTE: values $7, B, D, & E are only legal ones for pad 0, (rows 3 to 0, in both cases)
// $E, D, B, & 7 are only legal ones for pad 1