🚀 go-pugleaf

  Mouse support for my BGI drivers is through the standard int 0x33 interface
for mouse calls. (Your mouse driver must already be loaded for these
functions to work)

  The mouse driver (mouse.com/sys) worked in SuperVGA modes, but did not
have support for drawing the cursor itself.  The mouse support in the BGI
drivers adds this functionality.

  So, to get the mouse to work with the BGI drivers:

  ...
   union REGS regs;
   int gd, gm, havemouse;

   gd = DETECT;
   installuserdriver(driver_name,Always);
   initgraph(&gd,&gm,"");
   regs.x.ax = 0;
   int86(0x33,&regs,&regs);
   // regs.x.ax will be 0 or 0xFFFF, forget which one specifies if the mouse
   // is available right now, been using Unix too long ;-)
   // Anyway, set havemouse to true if the mouse is available
    if (havemouse) {
      regs.x.ax = 1;
      int8x(0x33,&regs,&regs);
      // display mouse cursor
   }
   // etc

  Check books/files on mouse programming for a more detailed account of how
  to use the int 0x33 functions.

  Oh, by the way, make sure to include a closegraph statement before exiting
  your program, the BGI driver captures the 0x33 interrupt, and if it is not
   released, nasty things will happen.

  Jordan Hargrave