Bitfields for TI Professional PC drive type byte: Bit(s) Description ) 0 drive A is double-sided 1 drive A has 80 tracks instead of 40 2 drive B is double-sided 3 drive B has 80 tracks instead of 40 4 drive C is double-sided 5 drive C has 80 tracks instead of 40 6 drive D is double-sided 7 drive D has 80 tracks instead of 40 Note: the type for drive A is determined by motherboard switches; the remaining drives' types are set from a table in IO.SYS SeeAlso: #03205