[Coco] coco II sideborder

[Simon Jonassen]

Hello Again !

So, more experimentation was necessary with the sideborder....

If you take a look at the following 3 pics, you will see that both xroar and
the real coco IIB display the same behaviour ! - if you shift from 16byte to
32 byte mode on a scanline, then the gfx have nowhere else to go but the
sideborder....

The shift in these pics was started mid screen... So if it were started
before, then the gfx would not be pushed so far into the border....


http://roust-it.dk/coco/bordercar.jpg

http://roust-it.dk/coco/borderxroar.jpg

http://roust-it.dk/coco/borderboth.jpg

/Simon :-)
 

-----Oprindelig meddelelse-----
Fra: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] På
vegne af Ciaran Anscomb
Sendt: 25. september 2013 22:10
Til: CoCoList for Color Computer Enthusiasts
Emne: Re: [Coco] coco II sideborder

"Simon Jonassen" wrote:
> so after more experimentation, I have a routine that puts gfx in the 
> border on xroar and the REAL COCO II !!!
> 
> the routine needs alot of tweaking to be useable, but the possibility 
> is there !!!
> 
> look at: http://www.roust-it.dk/coco/border.jpg
> 
> pic shows real PAL COCO IIB (6847T1) and laptop running xroar showing 
> same sideborder image.....

Blimey...

Is that a TV or a monitor?  I'm really surprised it's able to keep in sync
with that, as each line will be longer than the usual 64µs (or 63.55µs).

Good show, though!

..ciaran

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