From: mrmeanie AT easynet DOT co DOT uk (Mr. Meanie)
Newsgroups: comp.os.msdos.djgpp
Subject: ASM Modules in DJGPP + DPMI
Date: Fri, 22 Nov 1996 20:38:01 GMT
Organization: [posted via] Easynet Group PLC
Lines: 36
Message-ID: <57470h$s8f@cherry.news.easynet.net>
Reply-To: mrmeanie AT easynet DOT co DOT uk
NNTP-Posting-Host: mrmeanie.easynet.co.uk
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Hi,
    Could anyone help me?

	I am coding some VESA stuff in ASM. I wish to code it in 100% asm. I
am using TASM to assemble the code, o2c to convert the object files
into COFF format, and then I use GCC to compile the COFF file into an
EXE file. I have successfully turned a few of my ASM programs into
working EXEs this way. The CWSDPMI for use with DJGPP seems to be the
only good DPMI server + DOS extender about - DOS32 doesn't have all of
the DPMI functions, Windows is slow + I don't have Win95 so I couldn't
get 32-bit.... Plus the fact that FSDB by Spirit is a very good
debugger.... The programmes I write do work, however, this is where I
need help :-

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?

	By the way, If anyone wants any help with using ASM modules in DJGPP,
I would be glad to help.... (hopefully you wont need certain DPMI
functions which I am having problems with!)

Help Much Appreciated

Laters

   -Mr. Meanie		(Geoffrey French)