Re: An LCD for your IIGS?

[mjmahon@aol.com (Michael J. Mahon)]

Jeff Blakeney replied:

>On 20 Sep 2003 23:11:56 GMT, mjmahon@aol.com (Michael J. Mahon) wrote:
>
>>Ed Eastman wrote:
>>>
>>>This has been done years ago, off the shelf.  I had an old projector 
>>>with component input.  I used a VGA to component cable and an old mac 
>>>multisynch to VGA plug.  It works rather well so long as it s not a 
>>>newer projector that won't synch down to 15KHz.
>>
>>But the question about IIgs RGB to component video still stands.
>>
>>It should require nothing more than some analog matrixing
>>and buffers, but I haven't seen it done.
>
>Isn't that what Ed just posted about in the quote above?  It looks
>like IIgs RGB to component video only requires hooking up a Mac RGB to
>VGA adapter to the IIgs RGB out and hooking a VGA to component video
>adapter between from that to the component input on your display.
>Kind of like this:
>
>  IIgs --> Mac to VGA adapter --> VGA to component adapter --> Display
>
>At least, that is the impression I got from Ed's post.

Yes, I see what you mean.

I'm a bit surprised that the VGA-to-component conversion can be done
without a power supply (for the buffers), but perhaps the Mac/IIgs
video connector supplies power, or perhaps it is done entirely with
passive matrixing (seems difficult at 75 ohms in and out ;-).

BTW, I have never seen such a VGA-to-component cable.  Where
are these obtainable?  (Component video is generally _not_ at 
VGA scanning rates.)

-michael

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