[Coco] hardware scrolling

[Simon Jonassen]

Seems like i'm gonna have to start using "the tube" !

/Simon :-)


-----Oprindelig meddelelse-----
Fra: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] På
vegne af Retro Canada
Sendt: 25. oktober 2013 23:46
Til: CoCoList for Color Computer Enthusiasts
Cc: CoCoList for Color Computer Enthusiasts
Emne: Re: [Coco] hardware scrolling

Y U NO UTUBE? ;)

On Oct 25, 2013, at 5:30 PM, "Simon Jonassen" <simon at roust-it.dk> wrote:

Hmmmm....

It's a normal mpeg movie....

Mp2..... So if you download it you might be able to play it (it play fine on
windows media player)....

If not, there is a slightly different .avi file here:

http://roust-it.dk/coco/vsp.avi 

/Simon :-)


-----Oprindelig meddelelse-----
Fra: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] På
vegne af Wayne Campbell
Sendt: 25. oktober 2013 23:29
Til: CoCoList for Color Computer Enthusiasts
Emne: Re: [Coco] hardware scrolling

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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decode
http://cococoding.com/wayne/

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