Table 6-6 Peripheral I/O Parameter Block Definition 1 Disk Only 1----------------------------------------- No. Command No. status No. Device (() - Hard Disk 1 - Floppy Disk 2 - SCSI (Not Used) 3 - Tape 4 - Printer 5 - WorkNet 6 - EtherNet(Not Used) 7 - Console 8 - Auto Boot 9 - 586 Floppy I/O (() - Recal 1 - write Sector 2 - Read Sector 4 - Seek 5 - Format (() - No Error 1 - General Error 2 - Device not supported 3 - Device not present 4 - Invalid command 5 - Timeout error (Not Used) Res_l to Res_4 will have the device's results. (Refer to individual device driver's specification.
However, a non-zero normally indicated a failure condition) The beginning sector byte is used to specify the gap length size during hard disk and floppy formats. (Note: typically, a value of 50 (hex) is used. In both cases, the format requires the DMA buffer to be filled according to the format command specifications command required by the controller chip. (Note: Refer to individual device driver's specification) 6-11