The Rev C and D Z-machine Interpreter Programs (ZIP) save games to disk using a raw block scheme rather than an organized file system.
Each “Save Position” corresponds to a range of tracks on the disk.
During a save, the program workspace RAM is written out as a straight copy from memory to the sectors, in order, in the track range.
Writing a Disk BASIC directory track to a save disk would corrupt the save in position 4.
Writing a Disk BASIC boot track would corrupt the save in position 7.
| Tracks | Save Position |
|---|---|
| 0-4 | 1 |
| 5-9 | 2 |
| 10-14 | 3 |
| 15-19 | 4 |
| 20-24 | 5 |
| 25-29 | 6 |
| 30-34 | 7 |
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