C64 sixteen colours correspondant in A8 Pallete

[José Pereira]

Hi, I was always interested in knowing this, but would need to have the two Machines to try and I don't have...

Anyone, anywhere ever get this?

 

 

Thanks.

José Pereira.

[Wrathchild]

If you know the RGB values C64 emulators use then try entering them into this app.

[Rybags]

Rough guide - note of course you can't get odd luma values in most Atari modes so your choice to go one lower or one higher.

This is done using emulators as a guide, so real machines will be slightly different. PAL/NTSC also have differences in both cases.

Also, supposedly different VIC revisions have different luma values.

 

And finally, biggest problem with normal Atari vs C64 palette. On Atari, colours are under-saturated for brighter values, over-saturated for lowest ones.

C64 tends to use brigher luma for most colours so can run constant saturation at a higher level.

 

C64      Atari col,lum
0  Black    0,0
1  White    0,15
2  Red      3,5
3  Cyan     9,11
4  Purple   4,7
5  Green    11,8
6  Blue     7,5
7  Yellow   14,14
8  Orange   1,5
9  Brown    14,4
10 Lt Red   3,10
11 Dk Grey  0,6
12 Med Grey  0,9
13 Lt Green 11,13
14 Lt Blue  6,10
15 Lt Grey  0,11

Edited February 24, 2011 by Rybags

[José Pereira]

Rough guide - note of course you can't get odd luma values in most Atari modes so your choice to go one lower or one higher.

This is done using emulators as a guide, so real machines will be slightly different. PAL/NTSC also have differences in both cases.

Also, supposedly different VIC revisions have different luma values.

 

And finally, biggest problem with normal Atari vs C64 palette. On Atari, colours are under-saturated for brighter values, over-saturated for lowest ones.

C64 tends to use brigher luma for most colours so can run constant saturation at a higher level.

 

C64      Atari col,lum
0  Black    0,0
1  White    0,15
2  Red      3,5
3  Cyan     9,11
4  Purple   4,7
5  Green    11,8
6  Blue     7,5
7  Yellow   14,14
8  Orange   1,5
9  Brown    14,4
10 Lt Red   3,10
11 Dk Grey  0,6
12 Med Grey  0,9
13 Lt Green 11,13
14 Lt Blue  6,10
15 Lt Grey  0,11

 

 

Thanks Rybags and Wrathchild this is what I want, small differences are no problem...

José Pereira.

 

P.s.- Wrathchild did you ever get anything on that Game I've sent you those "clean" screens?

[José Pereira]

Rough guide - note of course you can't get odd luma values in most Atari modes so your choice to go one lower or one higher.

This is done using emulators as a guide, so real machines will be slightly different. PAL/NTSC also have differences in both cases.

Also, supposedly different VIC revisions have different luma values.

 

And finally, biggest problem with normal Atari vs C64 palette. On Atari, colours are under-saturated for brighter values, over-saturated for lowest ones.

C64 tends to use brigher luma for most colours so can run constant saturation at a higher level.

 

C64      Atari col,lum
0  Black    0,0
1  White    0,15
2  Red      3,5
3  Cyan     9,11
4  Purple   4,7
5  Green    11,8
6  Blue     7,5
7  Yellow   14,14
8  Orange   1,5
9  Brown    14,4
10 Lt Red   3,10
11 Dk Grey  0,6
12 Med Grey  0,9
13 Lt Green 11,13
14 Lt Blue  6,10
15 Lt Grey  0,11

 

Normally I am using 2:1 ratio and only 128colours Pallete, and like this only Pair Luminances available, lets see if the "most right/match" ones are the less or the higher Pair Luminance of each C64 ccolour.

 

José Pereira.

[STE'86]

if it was me, i would base my conversion process on the colours used in International Karate.

 

simply because it was done at the same time as the 64 version by the same guy needing to get the same result.

 

using pretty much all the c64 palette.

 

so...

 

i would have expected him to have done the comparison/conversion already.

 

just a thought.

 

Steve

[José Pereira]

if it was me, i would base my conversion process on the colours used in International Karate.

 

simply because it was done at the same time as the 64 version by the same guy needing to get the same result.

 

using pretty much all the c64 palette.

 

so...

 

i would have expected him to have done the comparison/conversion already.

 

just a thought.

 

Steve

Thanks. Thats it... stupendous idea!

Now that you said IK, I was wondering if there was any other game at the same situation...

but don't remember any...

Are any other(s)?

 

 

José Pereira.

[Rybags]

What are you trying to do?

 

If you're just converting static graphics from C64 to A8 then you just do that best-match like I mentioned.

 

Obviously you'd want to tweak the colours as you go along - chances are you'd end up with combinations that don't look right and could be fixed by simply boosting or reducing a luma setting or two.

[José Pereira]

What are you trying to do?

 

If you're just converting static graphics from C64 to A8 then you just do that best-match like I mentioned.

 

Obviously you'd want to tweak the colours as you go along - chances are you'd end up with combinations that don't look right and could be fixed by simply boosting or reducing a luma setting or two.

 

 

I am just thinking that in Games that, for example, are in C64 ColourMap:

-> Three same colours for all Chars and one change on each (like our PF2/PF3)

 

Many or some Games look good with C64 colours and I would like to start with these ones...

Someone said here sometime ago that C64 Pallete only sixteen colours are indeed very well choosed...

Just this...

 

 

 

Thanks.

José Pereira.

[José Pereira]

C64 Atari col,lum C64 IK emulated into G2F

0 Black 0,0-------------------0,2

1 White 0,15------------------0,14

2 Red 3,5-------------------3,6

3 Cyan 9,11------------------9,12

4 Purple 4,7-------------------5,8

5 Green 11,8------------------11,10

6 Blue 7,5-------------------7,6

7 Yellow 14,14-----------------14,14

8 Orange 1,5----Light Brown----1,12

9 Brown 14,4------------------1,8

10 Lt Red 3,10---Pink-----------3,12

11 Dk Grey 0,6-------------------0,6

12 Med Grey 0,9------------------0,10

13 Lt Green 11,13-----------------11,14

14 Lt Blue 6,10------------------7,10

15 Lt Grey 0,11------------------0,12

 

 

 

José Pereira.

[Wrathchild]

OK... but to complete this you'd need to state which palette you favour in G2F.