Comments (9)
chregu82
commented on July 17, 2024
I think this would be a very nice feature to be able to swap the color palette. I would probably define different palettes like Xterm, VGA, maybe others too. Xterm would be the default. I also could imagine to define a custom palette in a file on the compact flash. Palettes could be switched with a control code.
Could you provide the links you wrote about?
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lindoran
commented on July 17, 2024
absolutely -- here is a link with the RBG values to decimal color number
for VGA (mode 13h): https://www.freebasic.net/forum/viewtopic.php?t=17474
about mid way down there is a full broken out chart in ascii for the 256
color palette in order with RGB values.-- I wish there was a better example
of this, perhaps I will have to make one ... I really looked for a long
time. This is the best I could find. This is the less than helpful
wikipedia article but it does have good other related information
https://en.wikipedia.org/wiki/Mode_13h. This is yet another page on the
VGA mode 13h palette:
https://www.fountainware.com/EXPL/vga_color_palettes.htm
Here is ega, with the RGB values in hex
http://www.shikadi.net/moddingwiki/EGA_Palette. To change from RGB take
the hex value, each 2 digit pair is the color value in decimal. so 1 -
blue #0000AA is 0,0,170. I think this pallet is very close to the first 16
of mode 13h (vga or MCGA).
here is a link to the C64 color pallet and the color values by decimal
color numbers (a chart near the bottom) -
https://www.c64-wiki.com/wiki/Color
This is for CGA: https://en.wikipedia.org/wiki/Color_Graphics_Adapter --
the values are listed in HEX for the character mode colors, but they are
also the same colors for the composite mode for CGA .... There's also a
good breakdown of the various 4 color pallets for graphics mode. this
might be useful to have as well.
this is for the Tandy Graphics Adapter found on the tandy 1000 / PCjr:
https://en.wikipedia.org/wiki/Tandy_Graphics_Adapter
it's kind of a rabbit hole lol; I hope this helps :)
…On Wed, Sep 30, 2020 at 2:37 AM Christian Lehner ***@***.***> wrote:
I think this would be a very nice feature to be able to swap the color
palette. I would probably define different palettes like Xterm, VGA, maybe
others too. Xterm would be the default. I also could imagine to define a
custom palette in a file on the compact flash. Palettes could be switched
with a control code.
Could you provide the links you wrote about?
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if only there was an endless river of information, connecting the world's
computer systems; simply cataloging and indexing useful information....
sigh oh well.
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chregu82
commented on July 17, 2024
Please take a look at the develop branch. I implemented the ability to change the palette to VGA or C64. CGA and EGA colors seem to be part of the standard VGA color table.
I am unable to test this at the moment, as I don't have a Pi with me. So maybe it doesn't work at all.
Feel free to test it.
At the moment it's not yet possible to load a custom color palette.
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lindoran
commented on July 17, 2024
I'm at work for 10 hours I'll look whebt I get home thanks!
…On Wed, Sep 30, 2020, 7:39 AM Christian Lehner ***@***.***> wrote:
Please take a look at the develop branch. I implemented the ability to
change the palette to VGA or C64. CGA and EGA colors seem to be part of the
standard VGA color table.
I am unable to test this at the moment, as I don't have a Pi with me. So
maybe it doesn't work at all.
Feel free to test it.
At the moment it's not yet possible to load a custom color palette.
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lindoran
commented on July 17, 2024
the VGA pallet works as does the C64 Palette testing was done on the Pi-0 1.3 I ran a fractal from source and compared to output from the authors web page. all appears to be working and well. I wish I could test on a larger pi but I don't have one with functioning TX pins at the moment.
(C64)
(VGA / mode 13h)
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lindoran
commented on July 17, 2024
as stated, I didn't try custom but everything else seams to work so thanks :)
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chregu82
commented on July 17, 2024
Custom palette is done now too.
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lindoran
commented on July 17, 2024
I'll check it out in a bit :)
…On Sat, Oct 3, 2020, 2:02 PM Christian Lehner ***@***.***> wrote:
Custom palette is done now too.
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lindoran
commented on July 17, 2024
Custom is working on the pi-zero, manually programed in a mock 4 color CGA mode it's working perfectly, :) thanks for this! really pushes this project into a new light, very few terminal's like this. 👍
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