1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/mouse.c	Mon Nov 21 06:14:01 2011 +0200
     1.3 @@ -0,0 +1,74 @@
     1.4 +#include "mouse.h"
     1.5 +
     1.6 +#define INTR	0x33
     1.7 +
     1.8 +#define QUERY	0
     1.9 +#define SHOW	1
    1.10 +#define HIDE	2
    1.11 +#define READ	3
    1.12 +#define WRITE	4
    1.13 +
    1.14 +#define XLIM	7
    1.15 +#define YLIM	8
    1.16 +
    1.17 +int have_mouse(void)
    1.18 +{
    1.19 +	int res;
    1.20 +	asm {
    1.21 +		mov ax, QUERY
    1.22 +		int INTR
    1.23 +		mov res, ax
    1.24 +	}
    1.25 +	return res;
    1.26 +}
    1.27 +
    1.28 +void show_mouse(int show)
    1.29 +{
    1.30 +	int cmd = show ? SHOW : HIDE;
    1.31 +	asm {
    1.32 +		mov ax, cmd
    1.33 +		int INTR
    1.34 +	}
    1.35 +}
    1.36 +
    1.37 +int read_mouse(int *xp, int *yp)
    1.38 +{
    1.39 +	int x, y, bn;
    1.40 +
    1.41 +	asm {
    1.42 +		mov ax, READ
    1.43 +		int INTR
    1.44 +		mov bn, bx
    1.45 +		mov x, cx
    1.46 +		mov y, dx
    1.47 +		/* XXX some sort of div by 8 in the original code ? */
    1.48 +	}
    1.49 +
    1.50 +	if(xp) *xp = x;
    1.51 +	if(yp) *yp = y;
    1.52 +	return bn;
    1.53 +}
    1.54 +
    1.55 +void set_mouse(int x, int y)
    1.56 +{
    1.57 +	asm {
    1.58 +		mov ax, WRITE
    1.59 +		mov cx, x
    1.60 +		mov dx, y
    1.61 +		int INTR
    1.62 +	}
    1.63 +}
    1.64 +
    1.65 +void set_mouse_limits(int xmin, int ymin, int xmax, int ymax)
    1.66 +{
    1.67 +	asm {
    1.68 +		mov ax, XLIM
    1.69 +		mov cx, xmin
    1.70 +		mov dx, xmax
    1.71 +		int INTR
    1.72 +		mov ax, YLIM
    1.73 +		mov cx, ymin
    1.74 +		mov dx, ymax
    1.75 +		int INTR
    1.76 +	}
    1.77 +}