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⌂ ∞ Elite on the BBC Micro and NES

Universe: KS4

[NES version, Bank 0]

       Name: KS4                                                     [Show more]
       Type: Subroutine
   Category: Universe
    Summary: Remove the space station and replace it with the sun

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * KILLSHP calls KS4




.KS4

 JSR ZINF               ; Call ZINF to reset the INWK ship workspace

 LDA #0                 ; Set A = 0 so we can zero the following flags

 STA FRIN+1             ; Set the second slot in the FRIN table to 0, which
                        ; sets this slot to empty, so when we call NWSHP below
                        ; the new sun that gets created will go into FRIN+1

 STA SSPR               ; Set the "space station present" flag to 0, as we are
                        ; no longer in the space station's safe zone

 LDA #6                 ; Set the sun's y_sign to 6
 STA INWK+5

 LDA #129               ; Set A = 129, the ship type for the sun

 JSR NWSHP              ; Call NWSHP to set up the sun's data block and add it
                        ; to FRIN, where it will get put in the second slot as
                        ; we just cleared out the second slot, and the first
                        ; slot is already taken by the planet

 JMP UpdateIconBar_b3   ; Update the icon bar so the docking computer icon gets
                        ; removed to reflect that we are no longer in the safe
                        ; zone, returning from the subroutine using a tail call