Date   : Fri, 29 Jul 1994 14:34:48 WET DST
From   : Bonfield James <jkb@...>
Subject: Re: cursor behaviour

James Fidell writes:

>I've spent a couple of days (yes, really :-( trying to get my emulator to

At least someone's still doing some work on things! I haven't added any
features to my emulator for MONTHS! Literally :-(

>That is, according to the manuals, write &20 into CRTC register 10.
>
>Why does this turn the cursor off ?

As far as I recall, without my 'guide with me, this register controls the size
of the cursor. In which case &20 is setting it to size zero (ie turning it
off).

>And, why, when you enter COPY mode, does the cursor re-appear as a block ?

This is almost certainly code performed by the OS. All we need to do is write
an accurate 6845 (all!) and we shouldn't worry about quite what the OS is
doing with it...

       James