Re: Copying Mac MFS disks on an Apple II

[Greg Buchner <apple22@mn.rr.com>]

In article <bj6a9a0167q@enews3.newsguy.com>,
 "Charlie" <charlied@NOSPAMbboard.com> wrote:

> Well, Bill, ProDOS volumes contain a word (two bytes) at a location in the
> Volume Directory Header ($29 byte offset from the beginning).  This word
> contains "the total number of blocks on the volume" (Apple's definition).  As
> you know the largest value you can fit into a word is $FFFF (65535).  A quick
> check of a 5.25" ProDOS disk will show that word to contain $118 (280) so the
> number is NOT zero based.
> I do admit that I have never actually created a 32 Mb volume on a real Apple 
> II
> to see what number is found in that location but I have always been to the
> understanding that the largest volume that can be created under ProDOS is
> 32Mb - 512 bytes.

Thanks for that info.  Not something I ever ran across being that I 
never used full 32MB volumes either.

I stand corrected with new (to me) information.

Greg B.

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