From:	spush AT atc-1s DOT hac DOT com (Stephen Pushak)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: ASM Modules in DJGPP + DPMI
Date:	29 Nov 1996 23:42:37 GMT
Organization:	Hughes Aircraft Company
Lines:	23
Message-ID:	<57nsdd$k92@hacgate2.hac.com>
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 961124114406 DOT 28870F-100000 AT is>
NNTP-Posting-Host:	sawgrass.hac.com
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

: On Fri, 22 Nov 1996, Mr. Meanie wrote:

: > To interface with VESA, I need a bit of DOS memory, So I call DPMI int
: > 31h fuction 100h (Allocate DOS Memory) to allocate DOS mem. All I need
: > is 48 paragraphs, - 768 bytes, and function 100h returns 'out of
: > memory error'!!. And what really annoys me I that I am asking for 16
: > (or 32) paragraphs, it returns out of mem error, and then proceeds to
: > tell me that there are ONLY 3000+ paragraphs available!! Well if there
: > are 3000+ paragraphs available, and I ask for 48, WHY DON'T I GET MY
: > 48!?!?!? If however, I call the C equivalent
: > ('__dpmi_allocate_dos_mem' or something similar) it works fine. Can
: > anyone assist me in getting it to work in ASM?

Try using the debugger to step through the C call and disassemble
the interface. It could be that you have incorrectly set one of the
registers or are misinterpreting the return status.

 Steve Pushak - spush AT hcsd DOT hac DOT com - Vancouver, BC, Canada

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