[BBC-Micro] Glorious DVI

richard.broadhurst richard.broadhurst at gmail.com
Mon Sep 7 00:42:51 BST 2015


I think fortress used half height characters - 4 scan lines, but if it looks the same on beebem and b-em, then it does not use this trick as beebem does not support it.

On 6 Sep 2015 12:04, John Kortink <kortink at inter.nl.net> wrote:
>
>
> On Wed, 29 Jul 2015 18:30:04 +0100, Richard Broadhurst <richard.broadhurst at gmail.com> wrote: 
>
> >Does this support the h-sync pulse width CRT "hack" to allow half character 
> >horizontal scrolling? 
> >No commercial BBC games used it that I know of, but some other home micros 
> >with the same CRT controller did and I have a demo for the beeb based on 
> >Rally-X that does. 
>
> I think Fortress may be using it. After much experimentation, 
> it's the only game that does not seem to work with my current 
> logic, and if I go outside the boundaries of proper logic, it 
> displays, but seems to be doing continuous adjustments to the 
> horizontal timing. 
>
> There are a couple of other games that do not output regular 
> timing (like Labyrinth, which outputs a few more characters 
> per line), but these I solved. 
>
>
> John Kortink 
>
> -- 
>
> Email    : kortink at inter.nl.net 
> Homepage : http://www.inter.nl.net/users/J.Kortink 
>
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