Skip to navigation

⌂ ∞ ▽ Elite on the 6502

Dashboard: SPBLB

[Acorn Electron version]

       Name: SPBLB                                                   [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Light up the space station indicator ("S") on the dashboard

    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




.SPBLB

 LDA #&20               \ Set A to the low byte of the screen address of the
                        \ space station bulb (which is at &7D20)

 LDX #LO(SPBT)          \ Set X to the low byte of the address of the character
                        \ definition in SPBT

 LDY #&7D               \ Set Y to the high byte of the screen address of the
                        \ space station bulb (which is at &7D20)

                        \ Fall through into BULB to draw the space station bulb