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Re: Vintage Computing Advice



On 2009-05-03 07:00:21 +0700, Eric Rucker <bhtooefr@gmail.com> said:

On May 2, 4:28�am, Jason <jasonb1...@yahoo.com> wrote:
Which 8-bit vintage computers offered component or RGB (same thing)
video output? �Certainly neither the 8-bit Ataris nor the Apple //
series. �The Atari was ahead of its time by offering s-video output 3
years ahead of anyone else.

The Apple //c had on-board digital RGB, and there were add-ons to get
RGB on a //e...

Where are you getting this information from?

The term "digital RGB" is not in common use. The modern DVI (aka DVGA) interface does separate the RGB signals into separate digitally encoded components, but the standard did not exist prior to 1999 so clearly the Apple //c could not have implemented it.

According to the Apple //c Reference Manual, Volume 1, the Apple //c has two video output connectors:

1)  A phono jack with a NTSC-compatible composite video signal.
2)  A video expansion connector.

The video expansion connector contains a number of custom outputs, presumably designed for use with the LCD panel display Apple released for it. Among the several signals output on this connector, NONE of them are RGB component video signals (either analog or digital).

The point is that some kind of external conversion device is necessary in order to display the //c video on a modern VGA or DVI panel display. In addition, from what others have reported here, most of these conversion devices fail to take into account the special (e.g. non-standard) nature of the composite video on the Apple // series.

--
Jason