From a26db5934994550b1ed577e01cbec27e659e16a1 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison Signal graphics come in groups of 16. These groups contain sprites in the same order as sprites 1275-1290 in trg1[r].grf and Action 5 type 4 (signals);
+ red, then green, for each of: SW-facing, NE-facing, NW-facing, SE-facing, E-facing, W-facing, S-facing, N-facing.
+ Programmable signal graphics (mappable type: programmable_signals)
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+
+
+ Group Contents
+ 0 Semaphore programmable signals
+ 1 Lighted programmable signals
This is indicated by the feature name: action5_programmable_signals, version 1