ATA_MASK_SECTOR_COUNT
ATA_MASK_SECTOR_COUNT_48 = 0x100 | ATA_MASK_SECTOR_COUNT,
if (_WriteRegs(&taskFile, ATA_MASK_SECTOR_COUNT
if (_ReadRegs(&taskFile, ATA_MASK_SECTOR_COUNT
fRegisterMask = ATA_MASK_SECTOR_COUNT