Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rice!uw-beaver!zephyr.ens.tek.com!vice!bobb
From: bobb@vice.ICO.TEK.COM (Bob Beauchaine)
Newsgroups: comp.lang.pascal
Subject: Re: WEIRD MOUSE CURSOR ON VGA 640X480
Message-ID: <6396@vice.ICO.TEK.COM>
Date: 28 Nov 90 22:21:37 GMT
References: <11573@j.cc.purdue.edu> <1990Nov28.073307.3210@bhpmrl.oz.au>
Organization: Tektronix Inc., Beaverton, Or.
Lines: 43

In article <1990Nov28.073307.3210@bhpmrl.oz.au> paulg@bhpmrl.oz.au (Paul Gallagher) writes:
>I program using Turbo Pascal mainly, and like many people,
>I have a mouse unit the handles alL
>the mouse functions (via int 33h). 
 ...
>My first problem was trying to effect the link. I don't
>think I ever firured it out! (can anyone enlighten me as to how it can
>be done, or why it can't?) I tried binobj ---> EGA.OBJ {$L ... etc, no luck!
>However, that wasn't the main concern: if you weren't supposed to 
>buggerize around with the EGA regs direct, then that would mean chucking
>BGI out the window. Iwasn't about to do that. 
>

  No news here.  If you don't have assembly source code available, Turbo
  Pascal is very unforgiving about linking external object code.  Has to 
  do with segment naming conventions, initialized data, etc.  In other
  words, forget it.

>(btw, have I mentioned that in all of the other - lower rez - graphics
>modes the mouse was working fin, but when the same routines were tried
>in EGA mode  - hi or lo rez - I got no cursor at all, and the mouse thought
>the screen was only 200 pixels high)
>

  What version of the Mouse driver do you have?  I have successfully 
  programmed the mouse (mine's a Logitech) using the int 33 functions and
  following the guidlines shown in the MS Mouse Programmers Guide.  I 
  have had absolutely no problems with all graphics modes through VGA
  640x480x16. I do understand that old versions of the mouse driver 
  don't know about some of the later video modes, simply because they 
  didn't exist when the driver was written.

  I can from personal experience verify that the MS mouse calling conventions
  with int 33 and BGI do work.

  Caution:  All of the above is from memory.  Since I have never had the
  problems you describe, the only opinion that's really worth anything is
  that you can get BGI and the mouse to cooperate with no hassles.  I 
  would personally check my mouse driver before I worried about your
  graphics card, though.

  Bob Beauchaine
  bobb@vice.ICO.TEK.COM