Date: Fri, 10 Nov 2000 12:20:30 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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To: Jack Klein <jackklein AT spamcop DOT net>
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CC: djgpp AT delorie DOT com
In-reply-to: <cXsLOk0f1zJiKD784VjSxRKo85Ag@4ax.com> (message from Jack Klein
	on Fri, 10 Nov 2000 04:52:43 GMT)
Subject: Re: cursor
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> From: Jack Klein <jackklein AT spamcop DOT net>
> Newsgroups: comp.os.msdos.djgpp
> Date: Fri, 10 Nov 2000 04:52:43 GMT
> > 
> > You mean, turn off the BIOS cursor and draw a character instead of it?
> > That's quite tedious, especially if you want the cursor to blink.
> 
> When you move the cursor onto some position of the display, build a
> character pixel map consisting of the character with your vertical
> line merged in, and set an unused character value (perhaps 255, which
> is a blank) to use this bit map.

This is possible on a PC today as well.

> Hook the timer and on every fourth timer alternate between the actual
> char value and the modified char value (i.e., 255), to get about a 2.5
> Hz blink rate.

This is what I call ``tedious''.

> The last few versions of the Norton Utilities for DOS offered text
> mode "graphics" including an arrow mouse pointer as an option on
> computers with an EGA or higher, which was much more complicated.
> Even though the mouse pointer was the size of a text character, they
> allowed it to move pixel-by-pixel, which means it could be covering
> varying parts of up to four characters at any given time.

The mouse pointer is a different beast, we were talking about the text
cursor.