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⌂ ∞ ▽ Elite on the 6502

Stardust: STARS

[Elite-A, Flight]

       Name: STARS                                                   [Show more]
       Type: Subroutine
   Category: Stardust
    Summary: The main routine for processing the stardust

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * Main flight loop (Part 16 of 16) calls STARS




 Called at the very end of the main flight loop.



.STARS

 LDX VIEW               \ Load the current view into X:
                        \
                        \   0 = front
                        \   1 = rear
                        \   2 = left
                        \   3 = right

 BEQ STARS1             \ If this 0, jump to STARS1 to process the stardust for
                        \ the front view

 DEX                    \ If this is view 2 or 3, jump to STARS2 (via ST11) to
 BNE ST11               \ process the stardust for the left or right views

 JMP STARS6             \ Otherwise this is the rear view, so jump to STARS6 to
                        \ process the stardust for the rear view

.ST11

 JMP STARS2             \ Jump to STARS2 for the left or right views, as it's
                        \ too far for the branch instruction above