[Coco] CoCo 3 to VGA

[Mark Marlette]

At 01:04 PM 5/22/2004 -0700, you wrote:

I'm not a video guy so can someone explain to me why there is only four 
levels per signal? The CoCo is RGB-A, I don't understand how the CoCo can 
only have four levels.

Mark
Cloud-9


> > There's also an outfit called AverLogic that makes a scan doubler chip
> > (http://www.averlogic.com/video_converter/AL250.html). They're REALLY
> > close-mouthed about how much they sell the chip for, though.
> >
>
>I have one of these chips in a device called InstanTV for viewing TV on a VGA
>monitor. Only RF and composite inputs though :(
>I have the datasheet, reference design and other useful pdf's on the AL250
>(probably still available from their website), and think someday I may try to
>experiment with it.
>
>DESCRIPTION (from the flyer):
>The AL250 Video Scan Doubler (De-Interlacer) is a video conversion chip for
>consumer video and multimedia applications. It converts interlaced NTSC
>or PAL, ITU-R BT 601 (CCIR601) or square pixel, YUV422 or RGB565 digital
>signals into computer monitor RGB signals for direct connection to a computer
>monitor or progressive scan TV.
>
>So we'd still need A/D, but I agree with an earlier post that this might be
>do-able with discreet components since there are only four levels per signal.
>
>Bob
>
>
>
>
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