[Coco] hardware scrolling

[Wayne Campbell]

It says I need a missing codec to play this file. The required codec is AC3
Audio ({E06D802C-DB46-11CF-B4D1-00805F6CBBEA}). Can you point me to this
codec?

Wayne



On Fri, Oct 25, 2013 at 1:26 PM, Simon Jonassen <simon at roust-it.dk> wrote:

> Yup....
>
> There is more than that....
>
> Overscan, multicolour, vertical scolling, zooming....
>
> $ff22 is truly a multipurpose register when timed correctly....
>
> /Simon :-)
>
>
>
> -----Oprindelig meddelelse-----
> Fra: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] På
> vegne af Rogelio Perea
> Sendt: 25. oktober 2013 22:23
> Til: CoCoList for Color Computer Enthusiasts
> Emne: Re: [Coco] hardware scrolling
>
> Impressive!. Yet another thing the CoCo was not supposed to do :-)
>
>
> -- RP
>
>
> On Fri, Oct 25, 2013 at 2:29 PM, Simon Jonassen <simon at roust-it.dk> wrote:
>
> > well now...
> >
> > after countless experiments and headaches, hardware scrolling of a 6K
> > hires bitmap via $ff22 and some raster trickery is entirely possible
> > on a coco II !!!!
> >
> > so the vdg isn't entirely dead afterall... she's hiding more tricks
> yet....
> >
> > http://roust-it.dk/coco/realvsp.mpe
> >
> > above link is a video of a real coco II and my laptop with Xroar
> > scrolling the 6k bitmap in hardware...
> >
> > the routine is only updating every 6th frame, so it can be much
> faster....
> > it can also be made to scroll further with a few more lines of code....
> >
> >
> > /Simon :-)
> >
>
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