[Coco] Coco Monitor Question

[Retro Canada]

You can try this cable too:

http://suhastech.com/do-it-yourself-make-a-svideo-to-rca-composite-cable-adapter/

I might test it on my apple 2c. Since I have now the hawksoft s-video
adapter for my coco3 and the image is sharp and clear :)

On Fri, Sep 7, 2012 at 10:13 AM, Michael Graham <mkgraham at gmx.com> wrote:
> I use a PCjr monitor with my CoCo 3, but I opened it up and bypassed the
> digital input circuitry (that is, all of the logic chips in the RGB signal
> path), which effectively turned it into an analog RGB monitor, giving me all
> the colors the CoCo can produce.  I have a feeling there are some impedance
> matching issues going on, but it's still much clearer than composite.
>
> -Michael
>
> On 9/7/2012 8:50 AM, Frank Swygert wrote:
>>
>> For anyone interested, the Commodore 1084 Magnavox equivalent is the
>> 8CM515. Just remembered that! I think the 1080 Maggie equivalent is an
>> 8CM505.
>>
>> Bill, he can get 64 columns with the composite output but that's about it.
>> If one of you run across an old PC CGA type monitor you can wire it directly
>> into the CoCo but will only get a few colors from the digital RGB monitor
>> (PC type). But as I said, good for text, and no extra circuit board needed.
>> EGA monitors will also sync down to the 15.7 kHz sync signal used by the
>> CoCo RGBA (A=Analog -- similar to CGA but will produce more colors).
>>
>> Monochrome TTL monitors can be connected, I think, but also require a
>> special cable with a circuit to combine RGB into a single video feed. At
>> least I seem to recall some people doing that!
>>
>> It's hard to find the old Mono/CGA/EGA monitors now. I believe one of the
>> expensive Sony Multi-Syncs will still go down to 15.7 kHz, but I'm not
>> sure...
>>
>> Here's a site showing most monitor pin-outs:
>> http://www.monitorworld.com/Cables/video_standards.html
>> Has everything for PC/Apple/Sun, but no Commodore or other brands (a
>> couple IBM only standards).
>>
>> -------------
>> Date: Fri, 7 Sep 2012 09:23:13 -0400 (EDT)
>> From: Bill Pierce<ooogalapasooo at aol.com>
>>
>>
>> Thanks Frank, He already has the composite monitor conected but can't see
>> 80column in OS9. He wants to try the RGB. Still don't know which one he has
>>
>>
>>
>>
>> -----Original Message-----
>> From: Frank Swygert<farna at amc-mag.com>
>> To: coco<coco at maltedmedia.com>
>> Sent: Fri, Sep 7, 2012 6:02 am
>> Subject: Re: [Coco] Coco Monitor Question
>>
>>
>> The Commodore 1080 and 1084 are both made by Magnavox, but I forget the
>> Maggie
>> model number. The 1080 needs the sync circuit modified as described in a
>> previous post, the 1084 will automatically adjust sync and work as is. I
>> agree
>> with Bill -- the 1084 is one of the most versatile classic RGB monitors,
>> will
>> work with a PC also IIRC. About the only one more versatile would be a
>> Sony
>> Multi-Sync, but they cost a lot more back then! The later Multi-Syncs
>> wouldn't
>> sync down to the level that the CoCo used though (standard CGA, but analog
>> instead of digital). Yes, you can connect a standard CGA monitor (if you
>> can
>> find one!), but you won't get the range of colors with the digital RGB
>> (CGA)
>> monitor. Still, it's good for text based applications.
>>
>>
>> --
>> 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



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