Tseng Qtec VGA 1024, Installation Manual

Page: 77 / 123

{
zoom( 2 );
w h i l e (
1
)
{
m o u s e (&x,&y);
zcenter(x,y);
}
>
zcenter(x,y)
int x, y ;
{
union REGS in,out;
in.x.ax = 1 ;
in.x.bx = x;
in.x.cx = y;
int
86 (zoom__int,&in,&out) ;
>
Function Code
AX = 2
Arguments
None
Description
Unzooms the display and returns the window to its original
state•
Lattice C Example
#include<dos.h>
zoom__e n d ()
{
union REGS in,out;
in.x.ax = 2;
int86(zoom__int,&in,&out)
;
>
Report Zoom
Function Code
AX = 3
Arguments
None
Return
AX = zoom factor
Description
Returns the current zoom factor in the AX register.
-60-