[Coco] CoCo2 Composite Video Mod

[Michael Graham]

One of the circuits I had tried was very similar to that one, but didn't 
work at all.

--Michael

On 11/11/2013 07:14 AM, Daniel Campos wrote:
> For any "good" composite output on the CoCo1/2 you will need to make the
> circuit described on the 6847 datasheet on page 12:
>
> http://people.ece.cornell.edu/land/courses/ece4760/ideas/mc6847.pdf
>
>
> If you don't mind not having artifact colors, you can also do an S-Video
> output for your CoCo2. The image quality is excelent! I just have done on
> my own CoCo2 this last weekend. Pictures on the link bellow:
>
> https://picasaweb.google.com/109345699838454178536/TRS80ColorComputer2#5944291386400575762
>
> Daniel
>
> 2013/11/11 Michael Graham <mkgraham at gmx.com>
>
>> See, I've tried doing the CoCo 1 style mods to the chip inside the RF can
>> in the CoCo 2, but didn't get any usable output.  I wish someone would just
>> publish a composite video mod that was verified to work on the CoCo 2, but
>> I haven't been able to find one anywhere.
>>
>> --Michael
>>
>> On 11/11/2013 06:10 AM, Bruce W. Calkins wrote:
>>
>>> A: the chip numbers are different in a CoCo 2.
>>> B: the MC1372 chip in the CoCo 2 is inside the RF modulator "can" which
>>> might be soldered.
>>> Bruce W.
>>> =========================
>>>
>>>
>>> ----- Original Message ----- From: "Gabriel Holland"
>>>
>>> I have been trying to mod a 64k CoCo2 to color composite out. I have
>>> tried 2 different mods and rebuilt one of them several times but all I
>>> get is a black screen. I have noticed that the mods usually are listed
>>> as CoCo1 but have read that they should work on a 2. Has anyone here
>>> successfully installed color composite on a CoCo 2? If so which circuit
>>> did you use?
>>>
>>>
>>> Here is one of the pages I used. It has 3 Composite mods and I built the
>>> first 2 (Fig 1 and "the Other Bob").
>>> http://sparksandflames.com/g35.html
>>>
>>> --
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> http://five.pairlist.net/mailman/listinfo/coco
>>>
>>> --
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> http://five.pairlist.net/mailman/listinfo/coco
>>>
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco
>>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco