msinterf.c File Reference

#include "mfb.h"
#include "mfbP.h"
#include <dos.h>

Include dependency graph for msinterf.c:

Go to the source code of this file.

Functions
void	ms_start ()
void	ms_end ()
int	ms_hreset ()
void	ms_pointer_on ()
void	ms_pointer_off ()
void	ms_status (int *x, int *y, int *b)
void	ms_point (int *x, int *y, int *k, int *b)

Function Documentation

void ms_end

(

)

Definition at line 62 of file msinterf.c.

{
    (void)ms_hreset();
}

int ms_hreset

(

)

Definition at line 71 of file msinterf.c.

{
    union REGS r;

    r.x.ax = 0x0;
    int86(0x33,&r,&r);
    if (r.x.ax == 0xffff)
        return (r.x.bx);
    return (0);
}

void ms_point	(	int *	x,
		int *	y,
		int *	k,
		int *	b
	)

Definition at line 126 of file msinterf.c.

{
    int xx, yy, bb;
    int xlst, ylst;

    ms_status(&xx,&yy,&bb);
    yy = pc.ysize - yy - 1;
    MFBDrawCursor(xx-8,yy+7);
    for (;;) {
        if (kbhit()) {
            *k = 0xff & getch();
            if (!*k)
                *k = 256 + getch();
            *b = 0;
            break;
        }
        if (bb) {
            *k = 0;
            *b = bb;
            break;
        }
        xlst = xx;
        ylst = yy;
        ms_status(&xx,&yy,&bb);
        yy = pc.ysize - yy - 1;
        if (xx == xlst && yy == ylst)
            continue;
        MFBEraseCursor(xlst-8,ylst+7);
        MFBDrawCursor(xx-8,yy+7);
    }
    *x = xx;
    *y = yy;
    MFBEraseCursor(xx-8,yy+7);
}

void ms_pointer_off

(

)

Definition at line 98 of file msinterf.c.

{
    union REGS r;

    r.x.ax = 0x2;
    int86(0x33,&r,&r);
}

void ms_pointer_on

(

)

Definition at line 85 of file msinterf.c.

{
    union REGS r;

    /* don't use!
    r.x.ax = 0x1;
    int86(0x33,&r,&r);
    */
}

void ms_start

(

)

Definition at line 15 of file msinterf.c.

{
    union REGS r;

    if (!ms_hreset()) {
        fprintf(stderr,"Error: Mouse driver not loaded.\n");
        fprintf(stderr,"Using keyboard arrow keys.  Hit any key to continue.\n");
        (void)MFBGetchar();
        pc.pointertype = KBRD;
        MFBSetColor(0);
        MFBFlood();
        MFBPointerInit();
    }
    /* This driver is designed to work in "strange" super-VGA modes.
     * The mouse driver thinks these are text mode, and quantizes the
     * returned mouse position in units of 8.  To avoid this, the logical
     * screen size is multiplied by 8, and the return coordinates
     * ( in ms_status() ) are divided by 8.
     */

    /* set logical screen size */
    r.x.ax = 7;
    r.x.cx = 0;
    r.x.dx = (pc.xsize-1) << 3;
    int86(0x33,&r,&r);
    r.x.ax = 8;
    r.x.cx = 0;
    r.x.dx = (pc.ysize-1) << 3;
    int86(0x33,&r,&r);

    /* set mickeys/pixels ratio (1/8 default) */
    r.x.ax = 0xf;
    r.x.cx = 1;
    r.x.dx = 2;

    /* move pointer to center of logical screen */
    int86(0x33,&r,&r);
    r.x.ax = 0x4;
    r.x.cx = (pc.xsize-1) << 2;
    r.x.dx = (pc.ysize-1) << 2;
    int86(0x33,&r,&r);
}

void ms_status	(	int *	x,
		int *	y,
		int *	b
	)

Definition at line 109 of file msinterf.c.

{
    union REGS r;

    r.x.ax = 0x3;
    int86(0x33,&r,&r);
    /* physical screen = 1/8 logical screen */
    *x = r.x.cx >> 3;
    *y = r.x.dx >> 3;
    *b = r.x.bx;
}