INT 25h with DOS 3 vs. DOS 5

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#156

From: Mark James
Date: Tue, 03 Nov 1992 17:40

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This may be a FAQ (in which case someone kindly point me to where it's
dealt with), but I've started to use DOS 5 for the first time and have
run into what I suppose is the four-byte sector number problem.  Programs
that use INT 24h and INT 25h for absolute sector reads and writes no
longer work.  Would someone please post (or send me by E-mail) the
following:

1.  What's different in the use of the absolute sector INTs?

2.  What (if anything) is different in boot sector information?

3.  Has anything else changed that I should know about?

4.  Is this *exactly* the same problem that Compaq's MS-DOS 3.1 had, in
    about 1987, with their first 300MB disks?

Thanks for any help.

-- Mark James  <jamesm@procor.dialogic.com> or <tmarkj@kcbbs.gen.nz>

-- 
Mark James  <jamesm@procor.dialogic.com> or <tmarkj@kcbbs.gen.nz>
Dialogic (N.Z.) Ltd.                Voice:  +64 9 302 1794 ext 27
Auckland, New Zealand               Fax:    +64 9 302 1793

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From: jamesm@procor.dialogic.com (Mark James)
Newsgroups: comp.sys.ibm.pc.misc
Subject: INT 25h with DOS 3 vs. DOS 5
Message-ID: <292@procor.UUCP>
Date: 3 Nov 92 17:40:39 GMT
Organization: Dialogic (N.Z.) Ltd, Auckland, New Zealand
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