how to use mouse in qbasic ?and svga moode?

Answer 1

You have to use interruptions,
I don't remeber the function how use in qbasic
Here are the interruptions in c.

//This procedure checks where a mouse is available
char IfMouse ()
{
unsigned int Result;
asm mov ax, 0
asm int 0x33
asm mov Result, ax
return Result;
}

//This procedure makes the mouse cursor visible
void ShowMouse ()
{
asm mov ax, 0x1
asm int 0x33
}

//This procedure makes the mouse cursor invisible
void HideMouse ()
{
asm mov ax, 0x2
asm int 0x33
}

//This procedure reads the location of the mouse cursor and the button press
//information
void ReadMouse ()
{
asm mov ax, 0x3
asm int 0x33
asm mov MouseB, bx
asm mov MouseX, cx
asm mov MouseY, dx
}

//This procedure sets the mouse cursor to another location
void SetMouseXY (unsigned int X, unsigned int Y)
{
asm mov ax, 0x4
asm mov cx, X
asm mov dx, Y
asm int 0x33
}

//This procedure sets the minimum and maximum values that the mouse cursor
//may reach in horizontal range
void SetMinMaxX (unsigned int Min, unsigned int Max)
{
asm mov ax, 0x7
asm mov cx, Min
asm mov dx, Max
asm int 0x33
}

//This procedure sets the minimum and maximum values that the mouse cursor
//may reach in vertical range
void SetMinMaxY (unsigned int Min, unsigned int Max)
{
asm mov ax, 0x8
asm mov cx, Min
asm mov dx, Max
asm int 0x33
}

Answer 2

put the mouse on the table under the mouse put a mouse pad move the mouse and click