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sector data from the host to the media. After transferring the last data in the buffer, it sets BSY and issues an Interrupt.
10.8.10 Format Track 9 |
| (50h) |
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| COMMAND CODE |
| 0 1 0 1 0 0 0 0 | REGISTER | |
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| REGISTER SETTING | NORMAL COMPLETION | ||
| DR |
| drive no. | no change | |
| CY | cylinder to format | no change | ||
| HD | head to format | no change | ||
| SN |
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| 01H |
| SC |
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| 00H |
| FT |
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| no change |
The track specified by the task file is formatted with ID and data fields according to the table transferred to the buffer. This command is rejected in LBA mode with an Aborted command error reported.
DRQ in status register is set as soon as the command register is written, and the buffer RAM receives the data transferred from the host. After 512 bytes are transferred into the buffer RAM, the drive resets DRQ, sets BSY and begins format operation. The drive seeks to the target cylinder if the head is not on the target track ( implied seek ). After completion of the command, it resets BSY and generates an interrupt.
Format table consists of the number of sectors ( 16 bits ) per track . Upper byte represents sector number, and lower byte represents format type.
The drive supports only 00H format type. Intending to maintain compatibility with previous models, the drive accepts any format type, but the function will not change.
Sector interleave is always set to one regardless of sector sequence in the format table. Data subsequent to format table are handled as “Don't care”.
FORMAT TABLE ( FIRST 86 BYTES ) (Ex. 43 logical sector mode)
0001, 0002, 0003, 0004, 0005, 0006, 0007, 0008, 0009, 0013, 0015, 0016, 0017, 0018,.0019, 001A,.......0029, 002A, 002B
DON’T CARE ( 426 BYTES ATTACHED )
0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, ........... 0000, 0000, 0000.
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