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Forums > C64 Pixeling > VICE Palettes
2024-11-20 11:09
Jetboy

Registered: Jul 2006
Posts: 288
VICE Palettes

If you look at paletes files in VICE they look like that

#
# VICE Palette file: PALette_C64_v1
#
# Syntax:
# Red Green Blue Dither
#

# Black
00 00 00 0

# White
FF FF FF F

# Red
8C 32 3D 5

# Cyan
66 BF B3 A


What is that Dither value, and how is it used?
2024-11-20 11:19
iAN CooG

Registered: May 2002
Posts: 3186
Seems not used anymore, from the old VICE documentation:
Quote:

4.3 Palette files
Palette files are used to specify the colors used in the emulators. They are made up of lines like the following:

RED GREEN BLUE DITHER
where RED, GREEN and BLUE are hexadecimal values ranging from 0 to FF and specifying the amount of red, green and blue you want for each color and DITHER is a 4-bit hexadecimal number specifying the pattern you want when rendering on a B/W display.

New vpl files don't have such 4th element.
2024-11-20 16:29
chatGPZ

Registered: Dec 2001
Posts: 11346
That value wasn't used for literally decades. In the dark ages, when displays had 16 colors, this was supposed to be used for dither patterns. I don't think it ever worked, at least i never saw code for this.
2024-11-21 10:41
Jetboy

Registered: Jul 2006
Posts: 288
Thank you guys for replies. Good to know i can ignore Dither parameter :)
And maybe I should update my VICE :)
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