HelenOS sources

REG_DRIVE_HEAD    935 uspace/lib/ata/src/ata.c 	ata_write_cmd_8(chan, REG_DRIVE_HEAD, drv_head);
REG_DRIVE_HEAD    980 uspace/lib/ata/src/ata.c 	ata_write_cmd_8(chan, REG_DRIVE_HEAD, drv_head);
REG_DRIVE_HEAD   1120 uspace/lib/ata/src/ata.c 	ata_write_cmd_8(chan, REG_DRIVE_HEAD, drv_head);
REG_DRIVE_HEAD   1354 uspace/lib/ata/src/ata.c 	ata_write_cmd_8(chan, REG_DRIVE_HEAD, drv_head);
REG_DRIVE_HEAD   1432 uspace/lib/ata/src/ata.c 	ata_write_cmd_8(chan, REG_DRIVE_HEAD, drv_head);
REG_DRIVE_HEAD   1493 uspace/lib/ata/src/ata.c 	ata_write_cmd_8(chan, REG_DRIVE_HEAD, drv_head);