10 Dec
2015
10 Dec
'15
8:05 p.m.
On 12/10/2015 12:18 AM, Oliver Lehmann wrote:
for LBA:
while ( pata_bsy() ) {}
write_io_register ( PATA_RW_SECTOR_COUNT_REGISTER, 1 );
write_io_register ( PATA_RW_SECTOR_NUMBER_REGISTER, 0 );
write_io_register ( PATA_RW_CYLINDER_LOW_REGISTER, 0 );
write_io_register ( PATA_RW_CYLINDER_HIGH_REGISTER, 0 );
write_io_register ( PATA_RW_DEVICE_HEAD_REGISTER, 0xa0 );
write_io_register ( PATA_W_COMMAND_REGISTER, 0x21 );
while ( pata_bsy() ) {} if
( pata_err() ) { return; } while (
!pata_drq() ) {}
If you're using LBA, should this be the setting:
write_io_register ( PATA_RW_DEVICE_HEAD_REGISTER, 0xe0 );
Bit 6 indicates LBA.
Also, note that if you're using drives larger than about 120GB, the
PATA-6 protocol comes into effect with 48-bit sector addresses.
--Chuck