Subj : BIOS interrupt
To   : borland.public.cpp.borlandcpp
From : "Rob C." <robb_christiansen@juno.com>
Date : Fri Aug 22 2003 04:28 pm


In addition to reading and saving the character at any x/y 
position on the screen (int = getch()?), I also need to read and 
save the foreground/background colors. According to the book, 
BIOS 08h will do this. It should return a two digit number, 
which reflects the two different colors. For my example below, 
it should return 37; 3 for red and 7 for white: red on white.
This program returns 32, which is red on green.

#include<stdio.h>
#include<dos.h>
#include<conio.h>

void window(int left, int top, int right, int bottom);
void textbackground(int newcolor);
void clrscr(void);
void gotoxy(int x, int y);

int readattr( int col, int row )
{
	struct REGPACK rp = {0};

gotoxy( col, row );

rp.r_ax = 0x0800;
intr(0x10, &rp);

return rp.r_ax & 0x00ff;
}

int main()
{
	int results, col=11, row=2;
        char conv[10];

window( col-1, col-1, col+29, row+15 );
   textcolor(RED);
   textbackground(WHITE);
clrscr();

results = readattr( col, row );

//sprintf( conv, "%s", results );
//sprintf() compiles and links fine, but screws up when run, why?

gotoxy( col, row );
cprintf( "results = %d hex = %x conv = -%s- \n", results, results, conv );

return;
}

.