[Coco] CoCo 1/2 to VGA?

[Luis Antoniosi (CoCoDemus)]

here is the schematic:

https://twitter.com/RetroCanada76/status/299203476859260929/photo/1

some results:

https://twitter.com/RetroCanada76/status/299157117712093184/photo/1
https://twitter.com/RetroCanada76/status/299157487767146498/photo/1
https://twitter.com/RetroCanada76/status/299157331688697856/photo/1

On Fri, Mar 8, 2013 at 3:07 PM, Michael Graham <mkgraham at gmx.com> wrote:

> Sorry about the blank message, I must really learn not to hover my mouse
> over the 'send' button.
>
> Anyway, I'm sorry I missed that, and I'll look for it shortly. The TV and
> the monitor both take YPbPr in low resolution, which, as far as I can tell,
> is identical to YCbCr (I've built an RGB to YCbCr transcoder that gave
> nearly perfect results on my TV).
>
> -Michael
>
> On 03/08/2013 02:03 PM, Luis Antoniosi (CoCoDemus) wrote:
>
>> I did it and posted here the schematics few weeks ago. Search for pristine
>> image on coco1/2. But is a YCbCr your TV/monitor must support that in low
>> resolution.
>>
>> On Fri, Mar 8, 2013 at 3:01 PM, Michael Graham <mkgraham at gmx.com> wrote:
>>
>>  So wait, does that mean you'd be able to get component video out of a
>>> late
>>> model CoCo 2 with a few video amps?  I'd like to try that.  I mean, I
>>> doubt
>>> it'd work on a modern LCD TV or anything, but I have a CRT TV and a CRT
>>> monitor that can both take low-resolution component video and display it
>>> quite well.  The monitor could probably do it even if it isn't quite at
>>> the
>>> right standard (it's a Sony PVM and has lots of adjustments).
>>>
>>> -Michael
>>>
>>> On 03/08/2013 12:12 PM, John W. Linville wrote:
>>>
>>>  On Thu, Mar 07, 2013 at 12:43:13AM -0600, camillus Blockx wrote:
>>>>
>>>>  Well the rf modulater works with composite video. You can take that
>>>>> signal
>>>>> after amplified it and end it to 75 Ohm to feed your a/v device. Look
>>>>> on
>>>>> google to find schematic for amp. Know for shure there is one that
>>>>> works
>>>>> on
>>>>> coco 2. Used it on my coco 2 myself.
>>>>>
>>>>>  That is true on the CoCo1, but not really true on the CoCo2.  On the
>>>> CoCo2, the Y, R-Y, and B-Y signals from the 6847 go to the modulator.
>>>> The MC1372 inside the modulator combines them into the NTSC RF signal.
>>>>
>>>> The CoCo1 uses an MC1372 as well, but only to generate NTSC composite
>>>> video which is then fed to a separate RF modulator.  That is why it
>>>> is easier to convert a CoCo1 to composite video out than it is to do
>>>> so for a CoCo2.
>>>>
>>>> John
>>>>
>>>>
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>>>
>>>
>>
>>
>
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Long live the CoCo