Chuck Guzis <ccl...@sydex.com> wrote:
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.
right - This is what I do in the code - I was writing "from memory".
Also, note that if you're using drives larger than about 120GB, the PATA-6 protocol comes into effect with 48-bit sector addresses.
OK - good to know. I only tested ranges 260MB - 80GB. Guess I'll just not support it then?! How is it different regarding setting the registers? But anyway... The host computer only supports 32bit adressing of 512Byte Blocks. And I guess I could also use 500GB IDE disks when using only lets say some hundrets of MB (plenty enough - the original harddisk in the system had about 54MB) Oliver
