[Coco] Stable colours

[Luis Antoniosi (CoCoDemus)]

well I'm using the 2-port RAM which is one read and one write. I guess
there is one with both. But it would add more and more wires, more and more
LE's for a crappy result.


Luis Felipe Antoniosi



On Tue, Sep 30, 2014 at 1:15 PM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

>
> On Tue, Sep 30, 2014 at 12:48 PM, Frank Swygert <farna at amc-mag.com> wrote:
>
>> artificial artifacts
>
>
> You are talking about the coco1 SG6, the infamous red that is in fact
> orange but if you are luck you get it blue...
>
> VCC emlator does a crap job emulating them. I prefer the MESS which is
> close to the NTSC but the mess is much more complex.
>
> Also, I use internal RAM for 2 lines only. I have one incoming line (from
> genlock) and one outgoing line (vga output). Those lines are stored/load
> from/into the main SDRAM (which is slow and must be loaded/stored in burst
> mode).
>
> In one clock cycle I can only have one pixel. I cannot get the next. The
> maximum I can keep the previous pixel in a variable. So at best case it
> would look like VCC, shifted because the first pixel wont the artifacted,
> suppose:
>
> 00 10 10 10 00 00
>
>
> The first 1 would remain black as the 0 would be blue, or red, or
> orange...what would create hard edges.. :P
>
>
>
>
>
>
> Luis Felipe Antoniosi
>
>
>