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Data Structures | |
| struct | hd_geometry |
Defines | |
| #define | HD_DATA 0x1f0 |
| Hd controller regs. Ref: IBM AT Bios-listing _CTL when writing. | |
| #define | HD_ERROR 0x1f1 |
| see err-bits | |
| #define | HD_NSECTOR 0x1f2 |
| nr of sectors to read/write | |
| #define | HD_SECTOR 0x1f3 |
| starting sector | |
| #define | HD_LCYL 0x1f4 |
| starting cylinder | |
| #define | HD_HCYL 0x1f5 |
| high byte of starting cyl | |
| #define | HD_CURRENT 0x1f6 |
| 101dhhhh , d=drive, hhhh=head | |
| #define | HD_STATUS 0x1f7 |
| see status-bits | |
| #define | HD_PRECOMP HD_ERROR |
| same io address, read=error, write=precomp | |
| #define | HD_COMMAND HD_STATUS |
| same io address, read=status, write=cmd | |
| #define | HD_CMD 0x3f6 |
| #define | ERR_STAT 0x01 |
| Bits of HD_STATUS. | |
| #define | INDEX_STAT 0x02 |
| #define | ECC_STAT 0x04 |
| Corrected error. | |
| #define | DRQ_STAT 0x08 |
| #define | SEEK_STAT 0x10 |
| #define | WRERR_STAT 0x20 |
| #define | READY_STAT 0x40 |
| #define | BUSY_STAT 0x80 |
| #define | WIN_RESTORE 0x10 |
| Values for HD_COMMAND. | |
| #define | WIN_READ 0x20 |
| #define | WIN_WRITE 0x30 |
| #define | WIN_VERIFY 0x40 |
| #define | WIN_FORMAT 0x50 |
| #define | WIN_INIT 0x60 |
| #define | WIN_SEEK 0x70 |
| #define | WIN_DIAGNOSE 0x90 |
| #define | WIN_SPECIFY 0x91 |
| #define | MARK_ERR 0x01 |
| Bits for HD_ERROR Bad address mark. | |
| #define | TRK0_ERR 0x02 |
| couldn't find track 0 | |
| #define | ABRT_ERR 0x04 |
| Command aborted. | |
| #define | ID_ERR 0x10 |
| ID field not found. | |
| #define | ECC_ERR 0x40 |
| Uncorrectable ECC error. | |
| #define | BBD_ERR 0x80 |
| block marked bad | |
| #define | HDIO_REQ 0x301 |
| #define | HDIO_GETGEO 0x301 |
| #define HD_COMMAND HD_STATUS |
| #define HD_DATA 0x1f0 |
| #define HD_PRECOMP HD_ERROR |
| #define HDIO_REQ 0x301 |
1.4.6-5