PATCH: Change color palette in Keen 1

adurdin · Post by **adurdin** » Sun Sep 21, 2003 4:28 am

This patch shows how to change the default 16 color palette to a different set of 16 colors. Each color is specified with three values in the range 0 to 63, one for red, one for green, and one for blue. This sample patch sets the colors to pastel-like shades, but you can change the 16 colors as you want.

Note: If you want to use this patch along with the "Change 'background' tiles" patch, then you must get rid of the last patch statement in this patch file, the one that patches at offset $4409.

Code: Select all

%ext ck1
%version 1.31

# This is the color palette: 16 entries of r, g, b (each 0-63)
%patch $13054
       05 05 00
       14 17 28
       21 28 14
       14 28 28
       28 24 14
       26 20 28
       28 28 20
       20 22 28
       11 12 16
       31 00 63
       39 63 31
       31 63 47
       63 39 31
       55 31 63
       58 63 45
       45 49 63

# Set the palette when we go into graphics mode
%patch $6E46  $E8 $D3 $D5 $90 $90

# Code to set graphics mode and set the palette
%patch $441C                  $B8 $0D $00 $CD
              $10 $B8 $12 $10 $B9 $08 $00 $BB
              $00 $00 $8C $DA $8E $C2 $BA $04
              $00 $CD $10 $BB $18 $00 $BA $1C
              $00 $CD $10 $C3

# Include this part if the "Change background tiles" patch is not used
# It gives us 36 spare bytes for the palette-setting code
%patch $4409      $B8 $14 $01 $26 $81 $3F $31
              $01 $73 $03 $B8 $8F $00 $26 $89
              $07 $E9 $5C $01

%end

A similar patch could be made for Keen 2 and 3, but I don't have time to do it at the moment.

Post by **KeenRush** » Sun Sep 21, 2003 7:33 am

Hmmm, pretty cool! :)
Oh, and will the user just use modkeen normally, export and import? Or do he/she need to change palette of those bmps too?

adurdin · Post by **adurdin** » Sun Sep 21, 2003 8:34 am

You can change the palette of the bitmaps if you want, so that you when editing them what they'll look like in the game; but you won't need to.

xtraverse · Post by **xtraverse** » Sun Sep 21, 2003 10:04 am

Ok now you've surpassed deity..I've been wondering how to do this for years.

adurdin · Post by **adurdin** » Sun Sep 21, 2003 12:44 pm

The tricky part with these patches is actually finding somewhere to fit the code in... fitting data (the palette) in is even harder. In the end, I overwrote the Turbo C++ copyright statement, and the three fatal error messages ("Null pointer assignment", "Divide error", "Abnormal program termination") with the palette data. So if for some reason one of these errors occurs, you'll end up with a garbled error message. But I figured it was a worthwhile trade-off.

Now, go show me what you can do with these patches -- they're useless, else. :)

Post by **KeenRush** » Sun Sep 21, 2003 1:24 pm

Now, go show me what you can do with these patches -- they're useless, else. :)

I will, but later. :) That's prefect.

Zorath · Post by **Zorath** » Sat Oct 04, 2003 4:52 pm

Here's the default palette, if someone wants to change just a few of the colors:

Code: Select all

...

%patch $13054 
       00 00 00 # black
       00 00 42 # blue
       00 42 00 # green
       00 42 42 # cyan
       42 00 00 # red
       42 00 42 # magenta
       42 21 00 # brown
       42 42 42 # bright gray
       21 21 21 # gray
       21 21 63 # bright blue
       21 63 21 # bright green
       21 63 63 # bright cyan
       63 21 21 # bright red
       63 21 63 # pink
       63 63 21 # yellow
       63 63 63 # white

...

Post by **KeenRush** » Sat Oct 04, 2003 6:14 pm

Good job Z. :)

CheesyDave · Post by **CheesyDave** » Thu Apr 08, 2004 1:26 am

^^; i'd just like to drudge this to the top and request that a similar patch be written for keen2 and keen3. <.< >.> not that i'm making a ck2 or ck3 mod. ><; not at all! ... ::cough:: =) yea, so if mr. durdin or someone could find a place in the code to smush this in, i'd really appreciate it~

Retodon8 · Post by **Retodon8** » Sat Aug 28, 2004 4:16 pm

I created a table with the default colours in the right (Keen) order, which might be useful for someone.
I decided to use the default EGA naming convention (meaning these names differ from Zorath's list), since most colours are pretty close.

http://retodon8.net/Keen.html#Tech
07-07-2005 edit: In case anybody's interested, the above link no longer works; it is now located at:
http://retodon8.net/Keen/index.php#Tech

Since I'm replying anyway, I'll mention I'd love to see a similar patch for Keen 4, 5, and 6, since I'd rather create something with those than the original trilogy.
Thanks if you can figure that out sometime, and thanks for doing the Keen 1 patch already!

02-09-2004 edit: I created a thread in the proper forum to request the above:
viewtopic.php?t=368

Post by **KeenRush** » Sat Aug 28, 2004 6:11 pm

Nice. Yeah, ones for the 'new' Keens would be cool as well.

Keen: Modding

PATCH: Change color palette in Keen 1

PATCH: Change color palette in Keen 1

..

:: kick ::

Colour table