[Coco] CoCo 2 Factory Composite Video RE'd

[Bruce W. Calkins]

I have a simple monochrome driver in one of my CoCo 2s that is "clipped/tack 
soldered" in.  As I remember it the color version was somewhat more 
complicated and I did not persue that route then.
Bruce W.
=================

----- Original Message ----- 
From: "Zippster"

> From what I’ve read, my understanding is that the CoCo1 did generate a 
> composite signal that could be tapped
> before it went to the RF modulator, but that the CoCo2’s used the 1372 
> differently, going directly to RF
> and didn’t have a valid composite signal that could be tapped directly 
> (except for Luma maybe).
>
> I think those CoCo2 “video driver boards" were picking up the various 
> signals and then generating the composite signal.
>
> A clipped in adapter could easily be done, but I’d much rather have 
> something soldered in.
>
> - Ed
>
>> On Dec 15, 2014, at 11:19 AM, Bruce W. Calkins 
>> <brucewcalkins at charter.net> wrote:
>>
>> Be advised that the modulators are different in the CoCo 1.  For one 
>> thing the MC-1372 is on the motherboard and not in the RF modulator.  My 
>> CoCo 1 composite monitor driver simply clipped to several points on the 
>> motherboard.  FWIW; it looks to me that you have complicated a simple 
>> task. "Back in the day" even the CoCo 2 composite monitor drivers simply 
>> clipped in, the rub being that the RF modulator needed to be opened to 
>> access the MC-1372.
>> Bruce W.
>> ==================
>>
>>
>> ----- Original Message ----- From: "Zippster"
>>
>>> I can layout boards to replace any of the RF modulators if I know the 
>>> dimensions and pinouts.
>>>
>>> So far I know of 3 types, CoCo 2 - Korean motherboards (RF lays flat on 
>>> MB), earlier (pre-Korean?)
>>> motherboards where the modulator is larger, and on edge.  And then CoCo1 
>>> (all the same modulator?)
>>>
>>> I have no problem doing boards for all these types if people want them.
>>>
>>> - Ed
>>
>>
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