From: "Gorden" <gorden AT ms9 DOT url DOT com DOT tw>
Newsgroups: comp.os.msdos.djgpp
Subject: about bios graphics mode mouse cursor
Date: Mon, 20 Nov 2000 15:16:09 +0800
Organization: DCI HiNet
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Why I cant not changce mouse cursor in bios graphics, and I post my source
My problem is why I can not regist my new mouse cursor, in main() function

#include <conio.h>
#include <go32.h>
#include <dpmi.h>

#ifndef __cplusplus
typedef unsigned bool;
#define true     0
#define false    1
#endif

#define END_OF_FUNCTION(x)    void x##_end(void) { }
#define LOCK_DATA(d,s)        _go32_dpmi_lock_data((d), (s))
#define LOCK_CODE(c,s)        _go32_dpmi_lock_code((c), (s))
#define UNLOCK_DATA(d,s)      _unlock_dpmi_data((d), (s))
#define LOCK_VARIABLE(x)      LOCK_DATA((void *)&x, sizeof(x))
#define LOCK_FUNCTION(x)      LOCK_CODE(x, (long)x##_end - (long)x)

/***************************************************************************
****************
Function : bool _mouse_detect(void)
Parameter: none
Returns  : on success returns true, otherwise return false
Rrmarks  : determines mouse driver
****************************************************************************
***************/
bool _mouse_detect(void)
{
  __dpmi_regs r;

  r.x.ax = 0;

  __dpmi_int(0x33, &r);

  return ((r.x.ax == 0) ? false : true);
}
/***************************************************************************
****************
Function : void _mouse_show(void)
Parameter: none
Returns  : nothing
Rrmarks  : show the mouse coursor
****************************************************************************
***************/
void _mouse_show(void)
{
  __dpmi_regs r;

  r.x.ax = 1;

  __dpmi_int(0x33, &r);
}
/***************************************************************************
****************
Function : void _mouse_hide(void)
Parameter: none
Returns  : nothing
Rrmarks  : hide the mouse cursor
****************************************************************************
***************/
void _mouse_hide(void)
{
  __dpmi_regs r;

  r.x.ax = 2;

  __dpmi_int(0x33, &r);
}
/***************************************************************************
****************
Function : int _mouse_where(int x, int y)
Parameter: x position and y position
Returns  : mouse button state
Rrmarks  : gets the mouse position and button state.
****************************************************************************
***************/
int _mouse_where(int *x, int *y)
{
  __dpmi_regs r;

  r.x.cx = 3;

  __dpmi_int(0x33, &r);

  *x = r.x.cx;
  *y = r.x.dx;

  return r.x.bx;
}
/***************************************************************************
****************
Function : void _mouse_goto(int x, int y)
Parameter: x position and y position
Returns  : nothing
Rrmarks  : moves mouse cursor to the given position.
****************************************************************************
***************/
void _mouse_goto(int x, int y)
{
  __dpmi_regs r;

  r.x.ax = 4;
  r.x.cx = x;
  r.x.dx = y;

  __dpmi_int(0x33, &r);
}
/***************************************************************************
****************
Function : int _mouse_pressed(int *c, int *x, int *y)
Parameter: mouse position's x, y and button pressed times
Returns  : mouse button state
Rrmarks  : gets the number of releases and last pressed position
****************************************************************************
***************/
int _mouse_pressed(int *c, int *x, int *y)
{
  __dpmi_regs r;

  r.x.ax = 5;

  __dpmi_int(0x33, &r);

  *c = r.x.bx;
  *x = r.x.cx;
  *y = r.x.dx;

  return r.x.ax;
}
/***************************************************************************
****************
Function : _mouse_release(int *c, int *x, int *y)
Parameter: mouse position's x, y and button release times
Returns  : mouse button state
Rrmarks  : gets the number of releases and last release position
****************************************************************************
***************/
int _mouse_release(int *c, int *x, int *y)
{
  __dpmi_regs r;

  r.x.ax = 6;

  __dpmi_int(0x33, &r);

  *c = r.x.bx;
  *x = r.x.cx;
  *y = r.x.dx;

  return r.x.ax;
}
/***************************************************************************
****************
Function : void mouse_window(int left, int top, int right, int bottom)
Parameter: left, top, right, bottom position of the window's
Returns  : nothing
Rrmarks  : set mouse vertical range and horizontal range
****************************************************************************
***************/
void mouse_window(int left, int top, int right, int bottom)
{
  __dpmi_regs r;

  r.x.ax =     7;
  r.x.cx =  left;
  r.x.dx = right;
  __dpmi_int(0x33, &r);

  r.x.ax =      8;
  r.x.cx =    top;
  r.x.dx = bottom;
  __dpmi_int(0x33, &r);
}
/***************************************************************************
****************
Function :
Parameter:
Returns  :
Rrmarks  :
****************************************************************************
***************/
void mouse_range(int *x, int *y)
{
  __dpmi_regs r;

  r.x.ax = 0x000B;

  __dpmi_int(0x33, &r);

  *x = r.x.cx;
  *y = r.x.dx;
}
/***************************************************************************
****************
Function :
Parameter:
Returns  :
Rrmarks  :
****************************************************************************
***************/
static unsigned char mouse_cursor[64] =
{
/* screen mask */
0xff, 0xff, // 1111111111111111b
0xff, 0xff, // 1111111111111111b
0xff, 0xff, // 1111111111111111b
0xff, 0xff, // 1111111111111111b
0xc0, 0x03, // 1100000000000011b
0xc0, 0x03, // 1100000000000011b
0xc0, 0x03, // 1100000000000011b
0xc0, 0x03, // 1100000000000011b
0xc0, 0x03, // 1100000000000011b
0xc0, 0x03, // 1100000000000011b
0xc0, 0x03, // 1100000000000011b
0xc0, 0x03, // 1100000000000011b
0xff, 0xff, // 1111111111111111b
0xff, 0xff, // 1111111111111111b
0xff, 0xff, // 1111111111111111b
0xff, 0xff, // 1111111111111111b
/* cursor mask */
0x00, 0x00, // 0000000000000000b
0x00, 0x00, // 0000000000000000b
0x00, 0x00, // 0000000000000000b
0x00, 0x00, // 0000000000000000b
0x00, 0x00, // 0000000000000000b
0x1f, 0xf8, // 0001111111111000b
0x1f, 0xf8, // 0001111111111000b
0x1f, 0xf8, // 0001111111111000b
0x1f, 0xf8, // 0001111111111000b
0x1f, 0xf8, // 0001111111111000b
0x1f, 0xf8, // 0001111111111000b
0x00, 0x00, // 0000000000000000b
0x00, 0x00, // 0000000000000000b
0x00, 0x00, // 0000000000000000b
0x00, 0x00, // 0000000000000000b
0x00, 0x00  // 0000000000000000b
};

int main(void)
{
  __dpmi_regs r;

  /* initial bios graphics mode 640x480x16 */
  r.h.ah = 0;
  r.h.al = 0x12;
  __dpmi_int(0x10, &r);


  /* determines mouse driver */
  _mouse_detect();

/* register my new mouse cursor */
  r.x.ax = 0x0009;
  r.x.bx = 0;
  r.x.cx = 0;
  r.x.dx = (int) mouse_cursor;        /* problem in here */
  r.x.es = _my_cs();                        /* problem in here */
  __dpmi_int(0x33, &r);

  /* showing mouse cursor */
  _mouse_show();

  /* waitting a key input */
  getch();

  return 0;
}