[Coco] CoCo 2

[Rob Rosenbrock]

One other thought…

I have a couple of Extron DVS 304 Scalers. I remember something said at one time about using them to drive a monitor. The only trouble is that I can’t seem to find anything on it.

> On Jan 14, 2023, at 8:13 PM, Patrick Ulland via Coco <coco at maltedmedia.com> wrote:
> 
> In my opinion, direct to VGA, and most variants, are too good. CoCo video expects to lose a lot out the door. After which the blocky font and, um, vibrant colors are toned down. Bet the comp input of that new display has some filtering to mimic the old analog mud, and thereby become viewable;-)
> 
> 
> On 1/14/2023 6:38 PM, Robert Emery via Coco wrote:
>> Also, I've never seen a composite to VGA converter that looked as good as a
>> regular (modern) TV with composite inputs. They all look like crap!
>> 
>> On Sat, Jan 14, 2023, 1:14 PM Rob Rosenbrock via Coco <coco at maltedmedia.com>
>> wrote:
>> 
>>> Okay, don’t laugh…
>>> 
>>> I have had one of the GBS-8200 boards for a few years. I bought it for my
>>> JAMMA cabinet when I was looking into a future replacement for the CRT.
>>> I’ve run across it a few times but never thought about using it with my
>>> CoCo3. You connected this to the video connector underneath the CoCo3? I’ll
>>> have to experiment with it some.
>>> 
>>> I also have another video that looks like it converts composite (they call
>>> it video/bnc) to vga, and something from black web that converts composite
>>> to HDMI.
>>> 
>>> All three of these could easily convert the composite signal to a modern
>>> monitor.
>>> 
>>>> On Jan 13, 2023, at 9:46 PM, Robert Emery via Coco <coco at maltedmedia.com>
>>> wrote:
>>>> I am pretty much in the same boat, having been away from the CoCo scene
>>> for
>>>> a couple decades. Here's what I've found...
>>>> CoCo DV is pretty much the only _currently_ available product that will
>>>> give you artifact colors via HDMI. The main drawbacks are that it doesn't
>>>> include audio and it doesn't work on a CoCo 3.
>>>> I installed one in a CoCo 2 that had no working video output (early model
>>>> converted to composite-only by Tandy) and it works great! My biggest
>>>> complaint was that I kept mindlessly hitting reset because I forgot I now
>>>> have a button to control artifact colors!
>>>> For the CoCo 3, I went to AliExpress and got a GBS-8200 for $15. Turns
>>> out
>>>> it works great for the CoCo 3 without modification... I just had to
>>> combine
>>>> the sync signals and viola!
>>>> I even made a straight Coco 3->VGA cable, with integrated audio and
>>>> combined sync (to H-sync)
>>>> Along with the 8200, get a VGA to HDMI adapter with audio input...  Grand
>>>> total ~$25-35 off AliExpress, probably three times that with local
>>> sources.
>>>> HTH,
>>>> Bob (LaCoCoStrangiato on YT)
>>> 
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