OpenEuphoria

Re: Graphics Problem

• Posted by Robert Craig <rds at RapidEuphoria.com> May 03, 2002
• 1176 views

Bryce Byrd writes:
> I have been playing around with the mouse.ex demo.  When I change to 
> graphics mode 257 (640x480 256 color) the mouse pointer no longer 
> appears and the mouse is centered at pixel 1024x1024 and can go up to 
> 2047 in either x or y value.  In essence the upper left 640x480 of my 
> 2047x2047 page is displayed.
>
> So my question is:  Is it my graphics card or is this normal?

There may be two problems here.

1. Graphics modes on DOS beyond VGA (640x480, 16 colors)
    were never well standardized. Each graphics chip maker
    went his own way. Adding:
                 include machine.e
                 use_vesa(1)
    at the top of your program may help with this.

2. DOS never really supported the use of the mouse above
    VGA. However some Euphoria people have worked out 
    ways of handling the mouse in SVGA. Search the archives
    for: mouse svga 
    Jiri Babor has some good routines. The use of the mouse
    in SVGA is not supported directly by ex.exe, only through
    routines written by Jiri and also a few other people.

Regards,
   Rob Craig
   Rapid Deployment Software
   http://www.RapidEuphoria.com