VCS SECAM - more infos

[khryssun]

Object : Z26 SECAM palette

 

This is a copy of the email I send to Eckhard.

I post it here for information.

Any help will be appreciate to complete tech info about the SECAM palette.

 

Informations I have collected using a SECAM VCS:

 

 

Yars' Revenge :

Make a score above 100000.

When the score screen is displayed, wait until the score's color change. then it turns to Grey (Mid Tone).

 

The Dark Green color I've noticed in the Space Invaders score (see previous post) may

be this grey color altered with some image echo. It's hard to say because the VHF image is not a very high quality image.

 

Space Invaders

Power on the VCS, Start a new game and loose.

Now whe have a double 0000 score at the top of the screen.

Let the colors roll :

The grey color appears clearly in some screens.

In some time the score appears in dark red on red background then dark purple on purple background.

 

I noticed the image echo factor is important and alter the visual perception of some colors.

In the same way some sprite / background colors combinations make the perception of a same color darker or lighter.

 

So I don't know if these dark red / dark purple colors are true ones or just an alteration of the grey color on regular red / purple colors backgrounds.

 

Anyway, regarding the Stella manual or my tech knowledges I can't explain this 9th color.

There's no sense for a number like 9. That corresponds to nothing !

 

any idea ?