[Coco] Run of RGB2VGA boards

[Salvador Garcia]

I sent my latest reply before I saw your post. Thanks Ed!


Salvador




-----Original Message-----
From: Zippster <zippster278 at gmail.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Sun, Aug 16, 2015 1:59 pm
Subject: Re: [Coco] Run of RGB2VGA boards


No.

You’re basically talking about digitizing 3 analog signals and 2 syncs,
processing all the 
video data, adding scan lines, artifacts, etc, and
outputting it all at twice the scan rate through a DAC.

Simultaneously.

Doing
that all sequentially (MPU style) and keeping up would be quite a task, you’d
need 
some ridiculous speed.

As mentioned, the parallel operation of the FPGA
makes it possible.

- Ed


> On Aug 16, 2015, at 1:33 PM, Kandur <k at qdv.pw>
wrote:
> 
> He was also asking about the Raspberry Pi, how about that?
> 
>> I
would ask the same question about a Raspberry Pi. This computer is a step up
from the Arduino and has more hardware resources, plus it is not much more
expensive than the Arduino.
> 
> Kandur
> 
> Sunday, August 16, 2015, 11:04:37
AM, you wrote:
>> An arduino cannot do it. It's a matter of speed and time and
sync. Even if
>> you overclock it to 1Ghz you will deal with a extremely complex
sync code,
>> counting instructions to perform it at the right time, because its
just a cpu
>> running code. A fpga runs paced in the edge of its multiple clocks
and perfect
>> timing fitting between each step and also most important: all in
parallel.
> 
>> Sent from my iPhone
> 
>>> On Aug 16, 2015, at 10:46 AM,
Salvador Garcia <ssalvadorgarcia at netscape.net> wrote:
> 
>>> Not an expert on
the DE-0 or the Arduino, but from what I do know of them I would assume that the
Arduino can't handle this task. Hopefully I'll be corrected. :-)
> 
> 
>>> The
DE-0, as such, and as I understand is an open ended device. The "program"that is
loaded onto it configures is components so that it behaves a certain. For
example, when it loads Gary's program for the FPGA Coco the, the DE configures
it self not only as a 6809 microprocessor, but specifically as a Color Computer
3.
> 
> 
>>> On the other hand, the Arduino is a microcontroller based computer
that just runs code. Of course, given enough code, any processor based product
could be used to convert the RGB signals to VGA, but I suspect that the Arduino
just does not have the necessary hardware resources to accomplish this task.
>

> 
>>> I would ask the same question about a Raspberry Pi. This computer is a
step up from the Arduino and has more hardware resources, plus it is not much
more expensive than the Arduino.
> 
> 
>>> I hope someone else chimes in. If any
of the above information is wrong I would like to corrected for the benefit of
all. Salvador
> 
> 
> 
> 
>>> -----Original Message-----
>>> From: Barry Nelson
<barry.nelson at amobiledevice.com>
>>> To: coco <coco at maltedmedia.com>
>>> Sent:
Sat, Aug 15, 2015 11:06 pm
>>> Subject: Re: [Coco] Run of RGB2VGA boards
> 
>

>>> I have a question, rather than a DE-0 Nano, could an Arduino Due be used
to
>>> perform the video processing if software was developed to run on it? It
has a 32
>>> bit processor running at 84 Mhz and is much less expensive than the
DE-0 Nano.
>>> In theory it looks to me as if it might work...
> 
> 
>>> Coco
mailing
>>> list
>>> Coco at maltedmedia.com
>>>
https://pairlist5.pair.net/mailman/listinfo/coco
> 
> 
> 
> 
>>> Coco mailing
list
>>> Coco at maltedmedia.com
>>>
https://pairlist5.pair.net/mailman/listinfo/coco
> 
> -- 
> Coco mailing list
>
Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco


--

Coco mailing
list
Coco at maltedmedia.com
https://pairlist5.pair.net/mailman/listinfo/coco