[Coco] Composite Video

[billg999 at cs.uofs.edu]

> I didn't have any problem hooking my Coco3 on my Sony Bravia LCD TV or my
> Dell 2001 LCD monitor with composite input or a Coby 17" TV LCD.

Hmmm....  And that brings me back to the possibility that time has
made some component drift out of spec and it is just my COCO3 that
has this problem.  I wonder if I have another COCO3 in one of those
boxes in storage that still works?  (I know there is one that is dead
but if people here are right it may be as simple as a new CPU, of which
I have a few, to make it work again.  Oh yeah, and the time to do it.)



bill

>
> I do have problems with the 2 transistor drive use on old cocos1. Some TVs
> don't like it.
>
>
> On Wed, Aug 14, 2013 at 12:55 PM, <billg999 at cs.uofs.edu> wrote:
>
>> > CoCo 1 & 2s need an adapter for composite output.  Their standard
>> output
>> > is
>> > analog RF for TV channel 3 or 4 (or was that 2 and 3?)  I have not had
>> any
>> > issues with the CoCo 3 composite output into a composite monitor of
>> the
>> > same
>> > vintage.
>>
>> Of the same vintage, that is the problem.  I guess I made the mistake
>> of assuming "NTSC composite video" actually was some kind of standard.
>> Looks like it is back to the drawing board as I don't see many monitors
>> "of the same vintage" being offered today.  Is there anywhere I can find
>> out just what the COCO3 does different from other NTSC Composite Videos?
>> Is it something as simple as levels? Or are we talking about wacked out
>> waveforms and timing issues?  I was utterly amazed at how crisp and
>> clean
>> the Apple2 output is on a modern technology monitor.  Surely we can do
>> the same.
>>
>> bill
>>
>>
>>
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>>
>
>
>
> --
> Long live the CoCo
>
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