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⌂ ∞ Elite on the BBC Micro and NES

Universe: SetCurrentSystem

[NES version, Bank 0]

       Name: SetCurrentSystem                                        [Show more]
       Type: Subroutine
   Category: Universe
    Summary: Set the seeds for the selected system to the system that we last
             snapped the crosshairs to

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * SetSelectedSystem calls SetCurrentSystem
             * SetSelectionFlags calls via RTS6




 Other entry points:

   RTS6                 Contains an RTS



.SetCurrentSystem

 LDX #5                 ; Set up a counter in X to copy six bytes (for three
                        ; 16-bit numbers)

.ssys1

 LDA selectedSystem,X   ; Copy the X-th byte in selectedSystem to the X-th byte
 STA QQ15,X             ; in QQ15, to set the selected system to the previous
                        ; system that we snapped the crosshairs to

 DEX                    ; Decrement the counter

 BPL ssys1              ; Loop back until we have copied all six seeds

.RTS6

 RTS                    ; Return from the subroutine