From: Frank Bennett <fwb AT hpfcfwb DOT fc DOT hp DOT com>
Subject: go32-1.09 2 problems (fwd)
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Date: Fri, 18 Dec 92 10:01:24 MST
Mailer: Elm [revision: 66.25]



Go32, Debug32 version 1.00 has been working great for me. I resently 
picked up version 1.09 and now a couple things don't work:

1)
  go32 now_existant_dos_short_file_name 

cause my machine to reboot. I am able to make go32/debug32 under 1.09. I
also was able to step through go32 using Borland td all the way up to
paging.c where things seem to blowup on the exit(1) when it can't open 
the file. I am using turbo C ver 2.0. any suggestions?

2)
  I added a GrHiColor mode to libgr - code below - similar to setmode.s
But the graphics display seems to stay in regular old VGA mode.  In 
looking at go32/graphics.c, exphdlr.c I don't see how my hack ever
worked, i_10 is looking for 0xffxx in eax? However if I link in 
dgraphics.obj - which loads the driver sooner than later - it works!
 
thank in advance for any suggestions,
Frank

environment, setup under mks shell running under DRDOS 5.0 on a 
AMD 386DX-40, hence / not \:
That is except for GO32.

LIBRARY_PATH=c:/c/djgpp/lib
PROMPT=$P$G
OS=DRDOS
ROOTDIR=c:/mks
BISON_SIMPLE=c:/c/djgpp/lib/bison.simple
GCCLIB=c:/c/djgpp/lib
GCCBIN=c:cdjgppbin
COMPILER_PATH=c:/c/djgpp/bin
GCCINC=c:/c/djgpp/include
GRXFONT=c:/djgpp/contrib/libgrx/fonts
HOME=c:/mks
COMSPEC=c:/command.com
GO32TMP=c:/tmp
OBJC_INCLUDE_PATH=c:/c/djgpp/include
VER=5.0
PATH=.;c:/c/djgpp/bin;c:/mks/bin;c:/windows;c:/bin;c:/tc;c:/drdos
TZ=EST0EDT
TMPDIR=c:/tmp
OBJCPLUS_INCLUDE_PATH=c:/c/djgpp/include
C_INCLUDE_PATH=c:/c/djgpp/include;c:/c/djgpp/contrib/include
FLEX_SKELETON=c:/c/djgpp/lib/flex.skeleton
CPLUS_INCLUDE_PATH=c:/c/djgpp/cplusinc;c:/c/djgpp/include
BISON_HAIRY=c:/c/djgpp/lib/bison.hairy
SHELL=c:/mks/bin/sh.exe
GO32=ansi driver c:\c\djgpp\drivers\tseng4k.grd gw 800 gh 600
GCCTMP=c:/tmp
_=c:/mks/bin/env.exe

/* This is file hicolor.s
   setup hicolor serria mode, 
   that is 16 bit pixels 5:5:5, but...
   notcompatible with GrPlot, mouse, colortable setup,
   etc .. all assume 8 bit pixels
 */

	.data
	.globl	__GrCurMode
	.comm	__GrCurMode,4
	.globl	__GrSetModeHook
	.comm	__GrSetModeHook,4

	.text
	.globl	_GrHiColor
_GrHiColor:
	push	%ebp
	movl	%esp,%ebp
	pushl	%ebx

	movl	$0x2e,%eax
	movl	%eax,__GrCurMode
	movl	$0x10f0,%eax
	movb	$0x2e,%bl

	int	$0x10

	movl	$640,%ecx
	movl	$480,%edx
	movl	%ecx,__GrSizeX
	movl	%edx,__GrSizeY
	decl	%ecx
	decl	%edx
	movl	%ecx,__GrMaxX
	movl	%edx,__GrMaxY
	movl	%ebx,__GrCanBcopyInBlit

	popl	%ebx
	popl	%ebp
	ret

the following pokes color values into the VGA framebuffer in
high color mode:

hicolor(x, y, r,g,b)
	int x,y;
	unsigned char r,g,b;
{
	unsigned short *p, pix;

	p = (unsigned short *)0xd0000000 + 640*y + x;
   *p = ((r&0xf8)<<7)|((g&0xf8)<<2)|(b>>3);
/*
   pix = ((r&0xf8)<<7)|((g&0xf8)<<2)|(b>>3);
   GrPlot( y, x, pix);
 */

}