Re: Apple II Colour --> RGB

[Linards Ticmanis <ticmanis@coli.uni-sb.de>]

Ned Ludd wrote:

> Anyone know the RGB equivalents for LO-RES and HI-RES Apple II graphics
> colours? 

The following is based on the actual technical properties of the
(pre-IIgs) Apple's video out circuits, and of the NTSC norm from the
late 1950s. It's recommended to set your PC monitor's Color temperature
to 6500K, like the NTSC norm specifies.

To get any fancier you'd have to convert the Apple's display phase
angles to real XYZ values according to the ISO base colorspace standard
and then find a transformation from XYZ to your monitor, using its xy
values for red, green, blue, and white, which are probably documented
somewhere. Can be done, but it's a lot of work.

LO-RES:
0 #000000
1 #e31e60
2 #604ebd
3 #ff44fd
4 #00a360
5 #9c9c9c
6 #14cffd
7 #d0c3ff
8 #607203
9 #ff6a3c
a #9c9c9c (yes it is the same as #5!)
b #ffa0d0
c #14f53c
d #d0dd8d
e #72ffd0
f #ffffff

HI-RES:
0 #000000
1 #14f53c
2 #ff44fd
3 #ffffff
4 #000000
5 #ff6a3c
6 #14cffd
5 #ffffff

-- 

Linards Ticmanis

 The Master said, "The business of laying on the colors follows the
preparation of the plain ground."