Re: Video Converter

[Michael J. Mahon <mjmahon@aol.com>]

BLuRry <brendan.robert@gmail.com> wrote:
> On Friday, July 13, 2012 8:17:26 PM UTC-5, Ed wrote:
>> I have an Apple iie platinum that I have resurrected. I have been able
>> to obtain floppy drives, z/80 card and the new CFFA card. What I wiuld
>> like to do is to improve the video to display on a newer LSD monitor. I
>> have seen these devices on Ebay (
>> http://www.paradisearcadeshop.com/en/video-converters-and-tools/23-cga-vga-hd-video-converter.html
>> ) and am curious if this would work to convert the output of the IIe. Or
>> is there another converter/board that would be better to output to  LCD
>> monitor with VGA input.
>> Thanks
> 
> You won't get much out of the composite port to improve on, because
> there's no way to get an S-Video signal due to the chroma and luma being
> combined in the signal generation.  

You could send the composite signal to both the luminance and the
chrominance S-video inputs. 

Apple II video is not bandwidth-limited, and the S-video luminance input
should preserve all the high frequencies needed for sharp 80-column text. 

The color decoder will only pay attention to the chrominance part of the
composite signal, so the color should be OK, too. 

>If you have access to a Ramworks III card with an RGB option then you
> could convert that to CGA or VGA.

Unfortunately, the usual RGB color rendering is a poor second to an NTSC
monitor...or any converter that does it well. 

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon