Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!usc!apple!portal!cup.portal.com!ekalenda
From: ekalenda@cup.portal.com (Edward John Kalenda)
Newsgroups: comp.sys.tandy
Subject: Re: TANDY 1000TX Video Mode 9 question
Message-ID: <39883@cup.portal.com>
Date: 6 Mar 91 03:40:56 GMT
References: <20773@shlump.nac.dec.com>
Organization: The Portal System (TM)
Lines: 21

Gaitan D'Antoni writes:
> I'm having a problem programming my mouse on a Tandy 1000 TX when using
> Tandy Mode Graphics (Video Mode 9). When I display the graphics cursor,
> using standard "INT 33h" function calls, I get two partial cursor
> images, each one missing every other row of pixels. Both images move
> together as I move the mouse. It appears that if the two images were
> overlaid I would get the proper cursor image. If I switch to some other
> graphics mode, such as mode 5, everything works fine.
> 
> I believe the mouse can be used in mode 9 because I have a Tandy paint
> program that, I think, uses the mouse in this mode. Any suggestions?

Mode 9 and on up are not supported by most mouse drivers on the Tandy.
The mouse driver thinks it has a PCjr video card which does not quite
match up to the Tandy. When I did a graphics program which used the
mouse, I had to do my own display functions for the mouse cursor. I think
that most paint programs don't bother using the mouse cursor display
support and do it themselves.

Ed
ekalenda@cup.portal.com