Re: Apple 2 gs and compatibility with a pc monitor

[spec@vax2.concordia.ca (Mitchell Spector)]

In article supertimer@aol.com (Supertimer) writes...

>dempson@actrix.gen.nz (David Empson) wrote:
>
>>Mac monitors are like VGA and higher derivatives: minimum horizontal
>>scan frequency is in the region of 30 kHz, and vertical resolution is
>>much higher (typically 480 lines or higher, except for the smallest
>>monitors that run at 512x384).
> 
>Actually, the IIGS monitor has almost everything in common
>with Mac and VGA and higher derivatives EXCEPT horizontal
>scan frequencies.  They are all analog RGB.

    Not really. Your typical VGA frequency display supports at least
640x480 non-interlaced, whereas the AppleColor RGB only supports up
to 640x200 non-interlaced. Also keep in mind the dot pitch is much
coarser on the IIgs display, 0.37mm (most VGA displays today are 
0.26, and even older ones I've seen are in the 0.28 - 0.31mm range).

    The vertical refresh is slower too, 60 Hz for all modes (pretty
much any VGA display will support at least 70 Hz for text modes).
Top it off with the fact the screen is only 11 inches viewable and
it has very little in common (overlooking the fact it's RGB, it's
analog and it's a computer). It has more in common with a TV set.

Mitchell Spector
spec@vax2.concordia.ca