Header (0x2b0 bytes)
| offset | size | Contents |
|---|---|---|
| 0x0000 | 17 | image name (ASCIIZ) |
| 0x0011 | 1 | (mod)raw track data support flag (0x00=not support, 0x10=supported) |
| 0x0012 | 8 | reserve (0x00) |
| 0x001a | 1 | write protect flag (0x00: no protect, 0x10: write protected) |
| 0x001b | 1 | disk type (0x00: 2D, 0x10: 2DD, 0x20: 2HD) |
| 0x001c | 4 | total disk image size |
| 0x0020 | 4 * 164 (0x290) | sector data table (0-163 track) |
| 0x02b0 | 4 * 164 (0x290) | (mod)track data table (0-163 track) 0=No track data or dirty track |
(mod)Track data (+0x540 (=0x20+0x290+0x290))
| offset | size | contents |
|---|---|---|
| 0x0000 | 4 | (mod)track data size |
| 0x0004 | variable | (mod)track data |
Sector data (+0x2b0 when without track data, +??? with track data)
| offset | size | contents |
|---|---|---|
| 0x0000 | 1 | C |
| 0x0001 | 1 | H |
| 0x0002 | 1 | R |
| 0x0003 | 1 | N |
| 0x0004 | 2 | # of sectors in this track |
| 0x0006 | 1 | density (0x00: double density, 0x40: single density) |
| 0x0007 | 1 | Deleted data (0x00: normal, 0x10: deleted data)XM7: 0x10 => RECORD_TYPE_ERR |
| 0x0008 | 1 | status (0x00: normal end, others: disk BIOS status) XM7: 0xb0 => Data CRC_ERR |
| 0x0009 | 2 | (mod)sector position (MFM byte) |
| 0x000b | 1 | (mod)Status extension. 0x01 = ID_CRC error |
| 0x000c | 2 | (mod)ID_CRC values |
| 0x000e | 2 | sector size |
| 0x0010 | variable | sector data |