Version analysis of COMC - Elite on the 6502

This code appears in the following versions (click to see it in the source code):

Cassette, Disc (flight), Disc (docked), 6502 Second Processor, Master and Electron

Code variations between these versions are shown below.

.COMC

Code variation 1 of 2A variation in the comments only

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Cassette, Flight, Docked, 6502SP, Master
Electron
 SKIP 1                 \ The colour of the dot on the compass
 SKIP 1                 \ The shape (i.e. thickness) of the dot on the compass

Code variation 2 of 2A variation in the comments only

Tap on a block to expand it, and tap it again to revert.

Cassette, Flight, Docked
6502SP, Master
Electron
                        \   * &F0 = the object in the compass is in front of us,
                        \     so the dot is yellow/white
                        \
                        \   * &FF = the object in the compass is behind us, so
                        \     the dot is green/cyan
                        \   * #WHITE2 = the object in the compass is in front of
                        \     us, so the dot is white
                        \
                        \   * #GREEN2 = the object in the compass is behind us,
                        \     so the dot is green
                        \   * &F0 = the object in the compass is in front of us,
                        \     so the dot is two pixels high and white
                        \
                        \   * &FF = the object in the compass is behind us, so
                        \     the dot is one pixel high and white