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From: ns@pr1me.UUCP (Niels Sondergaard)
Newsgroups: comp.sys.ibm.pc
Subject: DOS 3.3/DOS4.0 differences in INT 25 & 26
Message-ID: <736@pr1me.UUCP>
Date: 2 May 89 12:43:21 GMT
Reply-To: ns@pr1me.dk (Niels Sondergaard(Sales Support))
Organization: Prime Computer A/S, Copenhagen, Denmark
Lines: 20

Hi,

I do have a clone PC, I did upgrade to PC-DOS 4.0, and some 
programs did odd things, I would ask You if I could get some
help or hints to get things working again.

I seems like there has been a change in INT 25 and 26, from
DOS 3.3 to 4.0, and my programs is just using those interrupts.

In the "interrupt.lst" from Ralf Brown it says that if bit 1 in 
device attribute word is set then you should use the new calls,
I tried to patch IBMBIO.COM to have this bit reset, but it did
not work, I do NOT have disk that are bigger than 32 Mb, so I 
don't need the new call to INT 25 & 26.

Can anyone help me ?? (sure I could downgrade again, but that
would be embarrassing)-- 

 Niels S|ndergaard,   Software Services   -  Prime Computer A/S, Denmark.
 ns@pr1me.prime.dk,   {...}!mcvax!dkuug!pr1me!ns    or    ns@cph-d.Prime.COM