Xref:	news2.mv.net comp.os.msdos.djgpp:2309
From:	Tom Seddon <T DOT W DOT Seddon AT ncl DOT ac DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Unsupported interrupt 0x0d -- what?!
Date:	Sun, 31 Mar 1996 17:17:50 +0100
Organization:	University of Newcastle upon Tyne
Lines:	35
Message-ID:	<Pine.SOL.3.91-941213.960331171126.18888B-100000@aidan.ncl.ac.uk>
NNTP-Posting-Host:	aidan.ncl.ac.uk
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I have written a program (BBC emulator) using djgpp 1.12maint2, and
sometimes when I quit it it prints 'Unsupported interupt 0x0d' and bombs
to the DOS prompt. I hook the keyboard interrupt vector, but when this
happens the vector doesn't become unhooked, and I have to press the reset
button. The 'terminate' routine does the following: 

unhook keyboard vector
go to text mode
write cached disk images back to disk
quit

and it usually seems to crash round about the 'write disk' bits (the disk 
images become corrupted and truncated halfway, as if the computer crashed 
when writing them).

Can anyone help? I'm at my wits' end, and it's the only thing stopping me 
releasing the program happily (in its current state it will need BEWARE! 
messages everywhere!). What is interrupt 0x0d? What is it used for? Why 
will I get it? I have also had it when running Turbo Debugger 386 and 
Soft-Ice, if that's any help. And I have a Seagate drive and am running 
the QD6580 TSR drive speed-up device driver -- could this be causing it? 
Or is there just something fundamentally wrong with my program (djgpp's 
docs weren't much help.)

Any help much appreciated! (Please reply be e-mail, thnks)

--Tom
 
    |     ** Tom Seddon **	  E-mail: T DOT W DOT Seddon AT ncl DOT ac DOT uk
  - . -   			  www: http://www.ncl.ac.uk/~n5013784/
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