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Reverse Engineering Sid Meier's Railroad Tycoon for DOS from 1990

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Dear Vogons,

Today we will look into train animations. You can see animated trains in the game when:

- a cargo is delivered the first time to somewhere (investor and financier difficulty)

- a new speed record occurs (the train is displayed on the "New Speed Record" screen)

- a service is inaugurated

- etc.

Now, you might say that the train on the "New Speed Records" screen is not animated, but, it is actually a still frame of an animated train (tick count: 0x3D), so technically it is an animated train 😀.

Where are the assets that will be used to draw the animation? It depends on the scenario and whether the engine pulls "modern cars" or "old cars". All the assets required to display an animated train are jammed into a single PIC file.

Eastern USA (scenario ID = 0) and Western USA (scenario ID = 1):

If the train pulls old cars then "locos.pic" is loaded:

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