How to patch DB Set XL to work on arctic climate

00-HOWTO.md

DB Set XL on Arctic

This shows how to patch DB Set XL v0.82 so it won't disable itself when starting a game in arctic climate. The resulting patched file was tested with OpenTTD.

Requisites

• Original dbsetxlw.grf, downloadable from here
• grfcodec
• patch

Method

Save the attached dbsetxl-arctic.patch to same directory where dbsetxlw.grf is placed, then run:

grfcodec -d -p 2 dbsetxlw.grf
patch -p1 < dbsetxl-arctic.patch
mv sprites/dbsetxlw{,mod}.nfo
grfcodec -e -n -c dbsetxlwmod.grf

Then copy the dbsetxlwmod.grf into a directory where OpenTTD can load it, for example ~/.openttd/newgrf/.

Known Issues

DB Set XL replaces the rail level crossing and signal sprites with its own versions. The level crossing only looks correct with the original TTD base graphics for the temperate climate. To workaround this, load another NewGRF that replaces the base road set after dbsetxlwmod.grf.

dbsetxl-arctic.patch

--- a/sprites/dbsetxlw.nfo        2021-01-30 22:40:27.907375347 +0200
+++ b/sprites/dbsetxlw.nfo        2021-01-30 18:59:36.093834188 +0200
@@ -14,14 +14,14 @@
     7 * 6       07 85 01 \70 1B 01
     8 * 9       09 8B 04 \7! 00 00 00 00 01
     9 * 16      0B 03 1F 02 "Multihead 0" 00
-   10 * 6       07 83 01 \7= 00 06
+   10 * 6       07 83 01 \7< 02 06
    11 * 9       07 88 04 \7G 6D 62 07 00 02
    12 * 9       07 88 04 \7gG 6D 62 07 00 01
    13 * 9       07 8B 04 \7! 00 00 00 00 00
    14 * 9       0D 00 \D| 00 FF 20 00 00 00
    15 * 6       07 00 04 \71 05 01
    16 * 9       07 8B 04 \7! 00 00 00 00 00
-   17 * 107     08 06 "mb" 04 01 "DB Set V0.82 (XL) 05.05.05" 00
+   17 * 107     08 06 "mb" 04 01 "DB Set V0.82(mod) 05.05.05" 00
         " 2003 - 2005 Michael Blunck - All "
         "rights reserved." 0D "Visit www.ttdpatch.de" 00
    18 * 9       07 88 04 \7G 6D 62 03 05 04