

			     IscaFS - Pseudo Images
			     ~~~~~~~~~~~~~~~~~~~~~~
			Version 0.08, 10th April 1999


Introduction
~~~~~~~~~~~~
ext2fs partition files are now implemented almost perfectly.  As an extra feature, and also in order to test more fully the block fetching and other functions, pseudo images will now be implemented.  This will be done by using a dummy image file which will simply contain enough information for the image filing system to read blocks from the relevant partition/disc.

In order to keep the size of IscaFS down, a separate application will be written to create image files which contain just the bare essential information required to access the relevant partition files, and IscaFS will not contain code to read partition tables, but just that required to read the given range of sectors from the disc.

Note - if you are using the old version of FileCore (RiscOS 3.5 or lower without the Clan FileCore patch) and you have a linux partition which extends over the 512meg limit, IscaFS will REFUSE to look at it.  This is because your version of FileCore will not read past the 512meg limit and so there is no way for IscaFS to do so (IscaFS uses the FileCore SWIs to read disc sectors).  This is not my problem, it's Acorn's, and there's nothing I can do about it.



Format
~~~~~~
1w	Special word 1 : "hL"
1w	Special word 2 : "ext2"
1w	Start sector
1w	End sector
1w	Log to base 2 of length of one sector, in bytes
1w	Drive number
ZTS	Filing system name
