Samuel W. Heywood wrote:
>
> There is no such thing as VGA monochrome, because all VGA monitors are
> either gray-scale or color monitors. All monochrome monitors are, by
> definition, two bit displays (i.e. 1 or 0) Monochrome monitors are not
> gray-scale monitors.
Hello Sam;
I'm afraid you are QUITE wrong there. Monochrome means one color NOT one
intensity. MY VGA monitor is MONOCHROME as per the above definition and
also as per its' specifications.
It, being VGA, is obviously capable of grayscale. (also as per spec.)
The two bit displays (sic) that you refer to are more accurately called TTL
monitors. Although the original MDA was only an on/off display, the word
monochrome did not refer to this property, only to its' non-polychrome
property to differentiate it from CGA.
To further complicate/confound the issue, some video card manufacturers
found a way to generate a grayscale on the TTL (on/off) monitors. By means
of a high frequency pulse-width modulation technique wherein the video is
turned on/off at a rate much too high for the monitor to fully respond to,
the screen can be made to display the AVERAGE intensity. (Many levels)
Thanks for giving us something to argue about. ;-)
- Clarence Verge
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