WonderWitch/Filesystem: Difference between revisions
From WSdev Wiki
Jump to navigationJump to search
(→Timestamp format: Ranges) |
|||
| (3 intermediate revisions by the same user not shown) | |||
| Line 11: | Line 11: | ||
|- | |- | ||
| <code>/</code> || || SRAM bank 3, $02F2 || 16 || | | <code>/</code> || || SRAM bank 3, $02F2 || 16 || | ||
|} | |||
=== /kern === | |||
The <tt>/kern</tt> folder is provided by FreyaOS. | |||
{| class="wikitable" | |||
|- | |||
! File !! Description | |||
|- | |||
| <tt>@ilib</tt> | |||
| [[WonderWitch/IL/IlibIL|IlibIL]]; can be overridden in <tt>/rom0</tt> | |||
|- | |||
| <tt>@proc</tt> | |||
| [[WonderWitch/IL/ProcIL|ProcIL]]; can be overridden in <tt>/rom0</tt> | |||
|- | |||
| <tt>@pfs</tt> | |||
| [[WonderWitch/IL/FsIL|FsIL]] | |||
|- | |||
| <tt>@shell</tt> | |||
| Shell program; can be overridden in <tt>/rom0</tt> | |||
|- | |||
| <tt>@aux</tt> | |||
| | |||
|- | |||
| <tt>about.txt</tt> | |||
| "About Freya" | |||
|} | |} | ||
| Line 26: | Line 53: | ||
FreyaOS displays the first 12 characters in its file selector. | FreyaOS displays the first 12 characters in its file selector. | ||
|- | |- | ||
| 40 || 4 || Location in CPU address space (segment:offset) | | 40 || 4 || File: Location in CPU address space (segment:offset) | ||
|- | |- | ||
| 44 || 4 || Total file size, in bytes, excluding the header. | | 44 || 4 || File: Total file size, in bytes, excluding the header. | ||
|- | |- | ||
| 48 || 2 || XMODEM chunk count | | 48 || 2 || File: 128-byte (XMODEM) chunk count, rounded up. | ||
Directory: Number of total available entries. | |||
<tt>0xFFFF</tt> (-1): Unallocated entry. | |||
|- | |- | ||
| 50 || 2 || File mode | | 50 || 2 || File mode | ||
| Line 36: | Line 65: | ||
| 52 || 4 || Modification time | | 52 || 4 || Modification time | ||
|- | |- | ||
| 56 || 4 || TODO | | 56 || 4 || File: TODO | ||
Directory: Pointer to FsIL implementation for directory | |||
|- | |- | ||
| 60 || 4 || Offset to resource data, bytes excluding header; | | 60 || 4 || Offset to resource data, bytes excluding header; <tt>0xFFFFFFFF</tt> if not present. | ||
|} | |} | ||
Latest revision as of 17:52, 12 April 2025
Mount points
| Path | File data location | File table location | File table size (entries) | Description |
|---|---|---|---|---|
/rom0 |
ROM (384 KB) | SRAM bank 3, $16F2 | 128 | |
/ram0 |
SRAM bank 0 (64 KB) | SRAM bank 3, $06F2 | 64 | |
/ |
SRAM bank 3, $02F2 | 16 |
/kern
The /kern folder is provided by FreyaOS.
| File | Description |
|---|---|
| @ilib | IlibIL; can be overridden in /rom0 |
| @proc | ProcIL; can be overridden in /rom0 |
| @pfs | FsIL |
| @shell | Shell program; can be overridden in /rom0 |
| @aux | |
| about.txt | "About Freya" |
File table entry format
| Offset | Length | Contents |
|---|---|---|
| 0 | 16 | File name; zero-terminated Shift-JIS string. |
| 16 | 24 | User-friendly file name; zero-terminated Shift-JIS string.
FreyaOS displays the first 12 characters in its file selector. |
| 40 | 4 | File: Location in CPU address space (segment:offset) |
| 44 | 4 | File: Total file size, in bytes, excluding the header. |
| 48 | 2 | File: 128-byte (XMODEM) chunk count, rounded up.
Directory: Number of total available entries. 0xFFFF (-1): Unallocated entry. |
| 50 | 2 | File mode |
| 52 | 4 | Modification time |
| 56 | 4 | File: TODO
Directory: Pointer to FsIL implementation for directory |
| 60 | 4 | Offset to resource data, bytes excluding header; 0xFFFFFFFF if not present. |
Timestamp format
| Bits | Contents |
|---|---|
| 31 - 25 | Year, 0 .. (starting from 2000) |
| 24 - 21 | Month, 1 .. 12 |
| 20 - 16 | Day, 1 .. 31 |
| 15 - 11 | Hour, 0 .. 23 |
| 10 - 5 | Minute, 0 .. 59 |
| 0 - 4 | Second, 0 .. 29 (in two-second units) |
File modes
15 bit 8 7 bit 0
---- ---- ---- ----
???? ???? dlis mrwx
|||| ||||
|||| |||+- Execute
|||| ||+-- Write
|||| |+--- Read
|||| +---- Prohibit mmap() use
|||+------ StreamIL-related?
||+------- Intermediate library
|+-------- Symbolic link
+--------- Directory
