🚀 go-pugleaf

hello there,

i recently got a gcc 2.6.3 (actually the djgppXXX.zip, etc) and
was trying to move my work (currently working on microsoft 
compiler cl ver 8.0) in 386 dos extender mode supported by gcc.
i have a problem accessing the video ram of my system.

1) it was supposed to be in 0xA0000000; but 

//this code should print 'A' in the upper left corner
void main(){
char * p = (char *)0xA0000000;
*p = 65;
}

//instead this code will give a protection fault.
ok where is the video ram

2) i'm using a Cirrus Logic 5426 VLB adapter and get a 
protection fault when i'm trying to draw a line.
i've tested both <graphis.h> and <grx.h>

any help is apreciated. thanx!