A very simple filesystem - just to get things going.
- All files currently have a maximum fixed size of 64 kB. Files are stored in a contiguous area in the storage device.
- Up to 1008 files can be created in one partition.
- The volume must be of at least of 64 MB.
- There is no directory support.
The first 512 bytes are loaded into RAM on computer initialization, and the operating system needs to bootstrap itself from it.
| Byte | Length | Description |
|---|---|---|
00 |
4 | Jump instruction |
04 |
4 | Signature (9f 45 a8 c3) |
08 |
2 | SimpleFS version |
0A |
2 | Reserved |
0C |
Up to 1FF |
Boot code |
Each file entry has 32 bytes, organized like this:
| Byte | Length | Description |
|---|---|---|
00 |
1 | File status (0: end of list; 1: file, 2: deleted file) |
01 |
1 | Reserved |
02 |
4 | File size (up to 64k) |
06 |
4 | File date |
0A |
21 | File name |
Formula to find file content sector: C = (i * 128) + 64.