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⌂ ∞ ▽ Elite on the 6502

Dashboard: SPBLB

[6502 Second Processor version]

       Name: SPBLB                                                   [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Light up the space station indicator ("S") on the dashboard by
             sending a #DOBULB 0 command to the I/O processor

    Context: See this subroutine in context in the source code
 Variations: See code variations for this subroutine in the different versions
 References: This subroutine is called as follows:
             * KS4 calls SPBLB
             * NWSPS calls SPBLB
             * RES2 calls SPBLB




 This draws (or erases) the space station indicator bulb ("S") on the
 dashboard.



.SPBLB

 LDA #DOBULB            \ Send a #DOBULB 0 command to the I/O processor to
 JSR OSWRCH             \ tell it to draw the E.C.M. indicator bulb on the
 LDA #0                 \ dashboard, and return from the subroutine using a tail
 JMP OSWRCH             \ call