WonderWitch/FreyaOS
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FreyaOS is an operating system and library set for WonderWitch, present in the second-to-last 64 KB of any WonderWitch cartridge.
It provides the following library functionality:
- process management,
- file system access,
- IL library management.
It additionally provides an user interface, which allows launching programs and performing file management/transfer operations.
File format
FreyaOS updates are officially in obfuscated .bin files. These contain the code and data of the OS.
When flashed to cartridge, a footer is added at the final 16 bytes of the 64 KiB block (0x6FFF0) with the following contents:
| Offset | Length | Contents |
|---|---|---|
| 0 | 5 | jmp far $E000:$0000 ($EA $00 $00 $00 $E0) |
| 5 | 1 | $00 |
| 6 | 2 | Size of OS data, in units of 128 bytes |
Revisions
- FreyaOS 1.0.0 (July 18th, 2000 [1]; launch version)
- FreyaOS 1.0.2 (September 2nd, 2000 [2])
- FreyaOS 1.0.3 (November 1st, 2000 [3])
- FreyaOS 1.1.0 (December 24th, 2000 [1])
- FreyaOS 1.1.1 (February 7th, 2001 [1])
- FreyaOS 1.1.2 (June 20th, 2001 [4])
- Improved file system stability.
- FreyaOS 1.1.3 (June 26th, 2001 [5])
- Fixed a regression in programs which used resource files.
- Fixed the lseek() function in the file system library.
- FreyaOS 1.1.4 (September 27th, 2001 [6])
- FreyaOS 1.1.5 (March 5th, 2002 [6])
- FreyaOS 1.1.6 beta1 (April 30th, 2002 [7])
- Fixed IRAM corruption when calling open()/stat() after initializing SoundIL.
- FreyaOS 1.2.0 (July 13th, 2002 [8])
- Validated for SwanCrystal consoles.
- FreyaOS 1.2.0S
- Special, stripped-down version of FreyaOS 1.2.0 used on pre-programmed Judgement Silversword and Dicing Knight cartridges.
