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Elite on the BBC Micro

Version analysis of ABORT

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

Code variations between these versions are shown below.

Name: ABORT Type: Subroutine Category: Dashboard Summary: Disarm missiles and update the dashboard indicators
Arguments: Y The new status of the leftmost missile indicator

Code variation 1 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

Other entry points: ABORT-2 Set the indicator to disarmed (white square)

Code variation 2 of 2Specific to an individual platform

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

Electron

LDY #&09 \ Set Y = &09 so we set the missile to a white square \ (disarmed)
.ABORT

 LDX #&FF               \ Set X to &FF, which is the value of MSTG when we have
                        \ no target lock for our missile

                        \ Fall through into ABORT2 to set the missile lock to
                        \ the value in X, which effectively disarms the missile

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