🚀 go-pugleaf

Okay.  I want to write to SVGA memory without using BIOS calls on my 486.  I can do it great with int 10, but it's slow as all hell.  What is happening is after I calculate the address for the VRAM, everything is getting modded into the top 64k of VRAM (one display pages worth, I guess).  Imagine the 1024x768x256 screen sectioned into 12 horizontal bars, and anything that you write is put into the TOP one.  ANyhow, I think this is because I'm not changing display pages.  So I tried Three things:

1)

void Plot(x,y,Color)
int x,y,Color
{

	int Page
	long offset;
	char far *address;

	Page = y/64;
	outport(0x3CD,Page);

	offset = 1024*y + x;
	address = (0xA0000000L + offset);
	*address = Color;
}


2) 


void Plot(x,y,Color)
int x,y,Color
{

	int Page
	long offset;
	char far *address;
	char far *PageAddress;

	Page = y/64;
	PageAddress = MK_FP(0000,0x462); /* The Low Memory address of the current
						Page Number */

	*PageAddress = Page;	

	offset = 1024*y + x;
	address = (0xA0000000L + offset);
	*address = Color;
}

3)

void Plot(x,y,Color)
int x,y,Color
{

	int Page
	long offset;
	char far *address;
	
	Page = y/64;
	
	_AH = 5;
	_AL = Page;

	geninterrupt(0x10);

	offset = 1024*y + x;
	address = (0xA0000000L + offset);
	*address = Color;
}
	
The Third one at least gave me some results - everything I had drawn got moved to the bottom half of the screen and above it was about 300 horizontal blue bars that flickered a lot.  Any ideas?  This is a Trident 8900 card w/ 1 meg VRAM on a 486/33 using Borland C++ 3.0.  HELP ME DAMMIT!  Can you tell I'm frustrated? YES!!!!


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