drivetype_not_present   = 0
drivetype_unknown       = 1
drivetype_1541          = 2     ; 1541, 1541-II
drivetype_1570          = 3     ; 1570
drivetype_1571          = 4     ; 1571
drivetype_1581          = 5     ; 1581
drivetype_fd            = 6     ; CMD FD
drivetype_hd            = 7     ; CMD HD
drivetype_sd2iec        = 8     ; sd2iec or uIEC
drivetype_vice          = 9     ; VICE virtual FS