[Is the Atari 2600 luminance linear?]

3 hours ago, MarcoJ said:

This is the resource I use.

 

https://www.randomterrain.com/atari-2600-memories-tia-color-charts.html

 

It's not bad, for a 70s console. 

That can't be very precise. In that diagram, for instance NTSC colors 1E and EE are exactly the same, RGB = FEFA40. The diagram is called "NTSC  (128 unique colors)" :-)

[Is the Atari 2600 luminance linear?]

How close to linear is the luminance output by a tv with respect to the luminance bits field of color registers in the 2600?

 

That is, can I expect the total light from one pixel of e.g. color $2E and one pixel of color $26 to consistently closely match the total light from two pixels of color $2A?

 

The reason I ask is I am working on anti-aliasing graphics, where part of an object sometimes are represented by some light in multiple pixels, and sometimes just light in one pixel. If I can see that it doesn't flicker too much on my tv and in stella, does that mean I can assume it will work well for all monitors?

[Sleeping with Optimal Efficiently]

If you don't mind a few pushes to the stack, this is 5 bytes and 63 cycles:

    lda     #0x0A       ; 0A is the ASL instruction
    pha
    bne     *-2

 

[Atari 2600 concept screens]

43 minutes ago, Thomas Jentzsch said:

Stack pointer at color registers + JSR?

Yeah... here blue and yellow is playfield, green and orange is P1, red is P0.

[Atari 2600 concept screens]

Here is a riddle for you: How do you make 6 consecutive pixels have 6 different colors?

Anyway... lots of colors, a 40 pixels wide great role model, and some mystery. Who could ask for more?