| bit 15 | 14 ~ 10 | 9 | 8 | 7 ~ 0 |
|---|---|---|---|---|
| Error | Reserved | Busy | Done |
Error Code 0 - Write protect violation 1 - Unknown unit 2 - Drive not ready 3 - Unknown command 4 - CRC error 5 - Bad drive request structure length 6 - Seek error 7 - Unknown media 8 - Sector not found 9 - Printer out of paper 10 - Write fault 11 - Read fault 12 - General failure 13 - Reserved 14 - Reserved 15 - Invalid disk change |