Xref:	news2.mv.net comp.os.msdos.djgpp:5700
From:	alaric AT abwillms DOT demon DOT co DOT uk (Alaric B. Williams)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Unsupported INT 0x0d
Date:	Sat, 06 Jul 1996 19:41:51 GMT
Lines:	29
Message-ID:	<836682030.7478.1@abwillms.demon.co.uk>
NNTP-Posting-Host:	abwillms.demon.co.uk
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi there... I'm writing low level stuff in DJGPP 1.12m4, in this case
a sound driver. It hooks IRQ 5, which is int 0x0D.

This works generally fine... except that occasionaly, without
provocation, it bombs out with "Unsupported INT 0x0D"

What can I do? I never call 0x0D directly; the PIC does that via
hardware. I am claiming the interrupt with both
set_real_mode_interrupt_vector (via an iret callback) and
chain_protected_mode_interrupt_vector. 

P.S. Why do I have to do this? It still mucks up without, but what is
this DPMI distinction between RM and PM ints?

I don't want to use v2 since my code will not work under DPMI (the
video driver directly accesses video RAM with 0xE00A0000... there is
no DPMI-able method that fast, am I correct?)

Thanx,


ABW
--
I have become... Comfortably numb...

Alaric B. Williams Internet : alaric AT abwillms DOT demon DOT co DOT uk
<A HREF="http://www.hardcafe.co.uk/Alaric/">http://www.hardcafe.co.uk/Alaric/</A>

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