[Coco] CoCo 1/2 to VGA?
Luis Antoniosi (CoCoDemus)
retrocanada76 at gmail.com
Fri Mar 8 15:03:57 EST 2013
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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