[Coco] Coco compatible monitors...

[J.P. Samson]

On Jul. 6, 2011, at 12:23 AM, Mark McDougall wrote:

>> On 2/07/2011 7:34 AM, Joel Ewy wrote:

>> Some FPGA boards such as the XESS XST-4.0/XSA-3S1000 combo, the  
>> Altera DE2
>> / DE2-70 have video digiziters on that than allow you to capture  
>> composite
>> video and store it in a frame buffer. You can then read it back and
>> display out the VGA connector at higher speeds. They are a very  
>> expensive
>> way of building a scan rate converter though.

> I am just finishing up on a project that mixes two video signals,  
> one of which is an analogue or digital input (the 2nd is fixed), and  
> output is to analogue or digital monitor. It handles any resolution  
> and frame rate (in and out), and the hardware supports composite, S- 
> video, RGB (eg. VGA) & DVI video on the input. Also does up-scan and  
> down-scan conversion in hardware.
>
> I'm yet to 'play' with it, but I plan to hook up all manner of micro  
> computers, including the Coco and Amiga. I'll post pictures when I  
> do get around to it.

I have no technical knowledge of such things, but with the flexibility  
of the FPGA, could you not do some additional processing on the stored  
frames?  Might it be possible to then "generate" artifact colors on  
output that were missing from the CoCo's RGB or PAL composite outputs?

-- JP