A |
BYTE OFFSET | VALUE | COMMENTS |
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| Mode Select Header |
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0 | 00 | Reserved |
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1 | (Note 1) | Media type |
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2 | 00 | Reserved |
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3 | 08 | Block descriptor length |
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| Block Descriptor |
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0 | 00 | Reserved |
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1 | 00 | Number of blocks (MSB) |
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2 | 00 | Number of blocks |
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3 | 00 | Number of blocks (LSB) |
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4 | 00 | Reserved |
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5 | 00 | Block length (MSB) |
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6 | (Note) | Block length |
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7 | (Note) | Block length (LSB) |
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NOTES: | 1. | The media type is selected using bit flags in the | ||||
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| attach packet attributes word, offset $10. | ||||
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| ATTRIBUTE FLAGS |
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MEDIA | ALL SECTORS | 500K BITS/ |
| MFM |
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TYPE | SAME BIT 7 | SEC BIT 3 |
| BIT 0 | NOTES | |
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1B | 1 | 1 |
| 1 | PCAT | |
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0A | 0 | 1 |
| 1 | 8 in., FM/MFM | |
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| (VERSAdos | |
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| double | |
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| density) | |
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06 | 0 | 1 |
| 0 | 8", FM | |
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| (VERSAdos | |
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| single density) | |
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16 | 1 | 0 |
| 1 | PCXT | |
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