Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!bellcore!texbell!killer!dgh
From: dgh@killer.DALLAS.TX.US (Douglas Heatherly)
Newsgroups: comp.os.minix
Subject: dosread (minix 1.4a)
Keywords: fat_size > 32767
Message-ID: <8192@killer.DALLAS.TX.US>
Date: 25 May 89 23:07:17 GMT
Organization: The Unix(R) Connection, Dallas, Texas
Lines: 25

I having a problem with dosread.  The first partition on my
hard disk (hd1) is MSDOS and is 32M, the second partition is
Minix with 10M.  I would like to be able to access the files
in the DOS partition directly without copying to floppy first.
I currently using the version of dosread that was modified by
Al Crew.  Since the number of sectors per fat for my DOS 
partition =64, my fat size is 32768.  This is one greater than
the maximum size so the integer variable fat_size overflows to
a negative number and the double word variable data_start comes
out negative.  This obviously will cause seek errors when I try
to do a dosdir of hd1.

I tried changing the variable declaration of fat_size to 
unsigned integer, but then lseek seems to complain about 
mismatched types.

I would prefer a software fix to dosread rather than moving 
around the partitions on my hard disk.

Does anyone have a version of dosread that can handle the max
size MSDOS partition (32M) as hd1?

			Thanks in advance
			Doug Heatherly
			dgh  killer.dallas.tx.us