Difference between revisions of "AGI/Specifications/Booters"
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==Donald Duck's Playground== | ==Donald Duck's Playground== | ||
[[Donald Duck's Playground]] is an adventure game that was originally released for the IBM PC as a booter on a 5.25-inch double-density floppy disk with the total capacity of 360KB (40 tracks, 2 heads, 9 sectors per track). The game uses AGI version 2.001. | [[Donald Duck's Playground]] is an adventure game that was originally released for the IBM PC as a booter on a 5.25-inch double-density floppy disk with the total capacity of 360KB (40 tracks, 2 heads, 9 sectors per track). The game uses AGI version 2.001. | ||
===Directories=== | |||
On the disk there exists directories that are equivalent to the '''logdir''', '''picdir''', '''viewdir''' and '''snddir''' in the DOS-based AGI games. Each directory entry is a '''(sector,offset)''' pair that indicates where on the disk is the beginning of the resource. The format of each entry is: | |||
<pre> | |||
Byte 0 Byte 1 Byte 2 | |||
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 | |||
. . . . S S S S S S S S S S S O O O O O O O O O | |||
</pre> | |||
where S is the sector number O the offset in that sector. Actually the sector number is not the absolute sector but an offset that is added to a base sector for all game resources. This base sector is the beginning of the DOS '''VOL'''-equivalent. | |||
Revision as of 08:40, 26 May 2011
Booter versions of AGI games
Donald Duck's Playground
Donald Duck's Playground is an adventure game that was originally released for the IBM PC as a booter on a 5.25-inch double-density floppy disk with the total capacity of 360KB (40 tracks, 2 heads, 9 sectors per track). The game uses AGI version 2.001.
Directories
On the disk there exists directories that are equivalent to the logdir, picdir, viewdir and snddir in the DOS-based AGI games. Each directory entry is a (sector,offset) pair that indicates where on the disk is the beginning of the resource. The format of each entry is:
Byte 0 Byte 1 Byte 2
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
. . . . S S S S S S S S S S S O O O O O O O O O
where S is the sector number O the offset in that sector. Actually the sector number is not the absolute sector but an offset that is added to a base sector for all game resources. This base sector is the beginning of the DOS VOL-equivalent.