56 lines
901 B
C
56 lines
901 B
C
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#include <dos.h>
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#include "mouse.h";
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/*** M O U S E ***/
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Mouse_t MOUSE;
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void far mouse_callback() {
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asm {
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mov ax, DGROUP
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mov ds, ax
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shr cx, 1
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mov MOUSE.x, cx
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mov MOUSE.y, dx
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mov MOUSE.buttons, bx
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}
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}
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void mouse_cleanup() {
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//uninstall handler
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asm {
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mov ax, 0ch
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mov dx, 0
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mov es, dx
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mov cx, 0
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int 33h
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xor ax, ax
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int 33h
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}
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}
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void mouse_init() {
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unsigned seg_mouse_callback = FP_SEG(mouse_callback);
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unsigned off_mouse_callback = FP_OFF(mouse_callback);
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unsigned int result;
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asm {
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xor ax, ax
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int 33h
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mov result, ax
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}
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if (result == 0) {
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printf("Mouse driver not installed\n");
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exit(1);
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}
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atexit(mouse_cleanup);
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asm {
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mov ax, seg_mouse_callback
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mov es, ax
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mov dx, off_mouse_callback
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mov ax, 0ch
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mov cx, 1fh
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int 33h
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}
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}
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