Version analysis of JSTGY - 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.

.JSTGY

Code variation 1 of 2Specific to an individual platform

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

Cassette, Flight, Docked, 6502SP, Electron
Master
 SKIP 1                 \ Reverse joystick Y-channel configuration setting
                        \
                        \   * 0 = standard Y-channel (default)
                        \
                        \   * &FF = reversed Y-channel
 SKIP 1                 \ Reverse joystick Y-channel configuration setting
                        \
                        \   * 0 = reversed Y-channel
                        \
                        \   * &FF = standard Y-channel (default)

                        \
                        \ Toggled by pressing "Y" when paused, see the DKS3
                        \ routine for details

Code variation 2 of 2A variation in the comments only

This variation is blank in the Cassette, Disc (flight), Disc (docked), 6502 Second Processor and Master versions.

Electron
                        \
                        \ Although this option is still configurable in the
                        \ Electron version, joystick values are never actually
                        \ read, so this option has no effect