Re: Disassembling an FST...

[david@uow.edu.au (David Wilson)]

supertimer@aol.com (Supertimer) writes:
>Breaking the 32MB limit for the ProDOS FST would be
>cool and would it not be possible?  MS-DOS had such
>a limit (under the FAT file system) and they broke it after
>DOS 4, I think.

Well, it would no longer be ProDOS but let us continue:

1)	Directory structure would have to change (it is full of block pointers)
	so any P8 program that read directories would need to be recompiled or
	rewritten.

2)	The following P8 system calls would have to be replaced by large
	disk aware ones:

	READ_BLOCK, WRITE_BLOCK

3)	Provided we keep the 16MB filesize limits, I think the rest of the
	calls would still work.

I guess that Appleshare for ProDOS would give some ideas on how this works.

If you do not want to keep compatibilty for ProDOS 8 applications, then you
could replace the ProDOS filesystem with anything you wanted.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia  david@uow.edu.au