MTEST2.C

/* ------------------------------------------------------------------
 * MTEST2.C - same raw INT 33h probe as MTEST.C, but run AFTER
 * iniciagra() (i.e. inside BGI graphics mode). Bypasses RATON.LIB
 * entirely. Compares against MTEST.C (text mode) to isolate whether
 * entering graphics mode is what breaks mouse reporting.
 * Build:  set MAIN=MTEST2.C  in BUILD.BAT, run BUILD, then run MTEST2
 * ------------------------------------------------------------------ */
#include "libregra.h"   /* iniciagra() + graphics.h */
#include <dos.h>
#include <stdio.h>
#include <conio.h>

void main(void)
{
    union REGS in, out;
    char buf[80];
    long count = 0;

    iniciagra();            /* enter BGI graphics mode, like DIAG/simso */

    setcolor(15);
    outtextxy(20, 20, "MTEST2 - raw INT 33h probe INSIDE graphics mode");

    in.x.ax = 0;             /* AX=0: reset mouse / driver check */
    int86(0x33, &in, &out);
    sprintf(buf, "AX=%04X  BX=%04X (present if AX=FFFF)", out.x.ax, out.x.bx);
    outtextxy(20, 40, buf);

    if (out.x.ax != 0xFFFF) {
        outtextxy(20, 60, "Driver did NOT respond inside graphics mode.");
        outtextxy(20, 75, "Press any key to exit.");
        getch();
        closegraph();
        return;
    }

    outtextxy(20, 60, "Driver responded. Move mouse / click. Press KEY to exit.");

    while (!kbhit()) {
        in.x.ax = 3;          /* AX=3: get position + buttons */
        int86(0x33, &in, &out);
        setfillstyle(1, 0);
        bar(20, 90, 620, 110);
        setcolor(14);
        sprintf(buf, "#%-6ld buttons(BX)=%04X x(CX)=%-5d y(DX)=%-5d",
                count++, out.x.bx, out.x.cx, out.x.dx);
        outtextxy(20, 95, buf);
        delay(50);
    }
    getch();
    closegraph();
}