Preventing CGA revisionist history

[Tony Duell]

> My recall of the color pallete in CGA mode was that the "dark" versions of
> the main colors were a bit flip from the main colors and that "brown"

Correct in general, that bit corresponds to the I line to the monitor.

> really was "dark yellow." You could call it dark yellow all you wanted
> (and some docs did) but once painted on the screen, it was brown. I think
> white with the corresponding bit set (cleared?) was gray. Or was dark gray
> equivalent to black...? I forget. I recall that something about it was
> logically wierd and didn't make sense.

Well, colour 0 is black (all bits off). Colour 15 is light white (all 
bits on). Colour 7 is either normal white or light grey (depending on 
what you want to call it!). Colour 8 is grey in the IBM manuals, you 
might think of it as light black. It actually does make sense if you look 
at the hardware.

-tony