[Coco] Modern monitors that work on CoCo 3 and MM/1

[Christopher R. Hawks]

On Thu, 06 Mar 2025 07:42:58 -0700
Frank Swygert via Coco <coco at maltedmedia.com> wrote:

> Allen Huffman wrote:
> 
> With the recent ?discovery? that some ?FreeSync? monitors will work
> with a CoCo 3 with just a cable, David Ladd did a test to see if the
> FreeSync monitor he already had would work with the MM/1 ? and it
> does. How long has this been a thing? Why are we inventing adapters
> and FPGAs and PI based converters if monitors exist? :)
> 
> I have a cable on the way, and will be taking a CoCo 3 down to Best
> Buy to go through their FreeSync monitors (if they allow) to see
> which ones work. I?ll try to create a document or web page with this
> information (maybe CoCopedia.com <http://cocopedia.com/> is a good
> spot).
> 
> We assume if it works on the CC3, it will work on the MM/1. I?ll find
> that out at some point when I dig mine out of storage.
> 
> More on this shortly...
> 
> =================================
> 
> I tried looking up FreeSync specs and didn't find much. It's an AMD
> technology designed to work with newer Nvidia chip graphics cards.
> AMD doesn't require a license, so it's getting popular. The monitor
> electronics "talks" to the graphics card and syncs the best refresh
> rate. Apparently the monitor side will detect the sync type and rate
> of the graphics input even if the graphics card does not have the
> nvidia chip set. That only makes sense, otherwise the monitor would
> REQUIRE an nvidia graphics card and the monitor maker would be less
> inclined to use it in their monitors. I was looking to see what the
> minimum refresh rate was but couldn't find it. Obviously low enough
> for the CoCo and Amiga. Not all monitors may sync that low though.
> 

    AND freesync ONLY works with HDMI and Display Ports! So the
'freesync' part is moot for the CoCo RGB. G-Sync is only on Display
Ports (v1.2a).

    What matters is if the VGA port will take a 15KHz signal. I have a
couple that do and one on the way that will. None of them are freesync
or G-Sync. Most of the previous monitors only sync down to 30 KHz.

    Hopefully, the 'sync's will guarantee that ALL inputs can sync to
15 KHz...


Christopher R. Hawks
HAWKSoft
-- 
I invented the cordless extension cord.		-- Stephen Wright
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