[Coco] Pristine image on coco2 and coco3 with GBS8200

[Steven Hirsch]

On Sun, 10 Feb 2013, Gene Heskett wrote:

> On Sunday 10 February 2013 22:45:31 Steven Hirsch did opine:
>
>> On Sun, 10 Feb 2013, Kip Koon wrote:
>>> Thank Allen for pointing out the GBS-8200 to us.  This product looks
>>> very promising!  :)  Please let me know how well it works.  If it
>>> works as well as I hope, I will be buying one for myself.  Now for a
>>> container for this little dream board to be housed in that is
>>> inexpensive.  Hummmm.
>>
>> I built mine into a large project box from Radio Shack.
>>
>> I haven't been following this thread very closely.  What are folks doing
>> to combine H + V sync?  I was never able to get the GBS to work with
>> separate sync at 15.75Khz. RGB in.
>>
>> Steve
>
> ISTR I made a resistive combiner and used the comp sync input.  I think...

Ok, I was just curious.  I went to the trouble of building a combiner from 
a quad NOR gate and a few passive components.  Results are actually fairly 
good for text.  The few Coco games I have looked awful.

> It also doesn't have quite enough video output to drive the monitor I am
> actually using, which is an Elotech crt with a touch screen I've been
> intending to see if I could write a driver for.  Lack of round tuits of
> course.

<sigh..> Isn't that the case.  The older I become, the behinder I gets...

Steve


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