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⌂ ∞ Elite on the BBC Micro and NES

Missions: PAS1

[NES version, Bank 0]

       Name: PAS1                                                    [Show more]
       Type: Subroutine
   Category: Missions
    Summary: Display a rotating ship at space coordinates (0, 100, 256) and
             scan the controllers

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * PAS1_b0 calls PAS1




.PAS1

 LDA #100               ; Set y_lo = 100
 STA INWK+3

 LDA #0                 ; Set x_lo = 0
 STA INWK

 STA INWK+6             ; Set z_lo = 0

 LDA #2                 ; Set z_hi = 1, so (z_hi z_lo) = 256
 STA INWK+7

 JSR DrawShipInBitplane ; Flip the drawing bitplane and draw the current ship in
                        ; the newly flipped bitplane

 INC MCNT               ; Increment the main loop counter

 JMP MVEIT              ; Call MVEIT to move and rotate the ship in space,
                        ; returning from the subroutine using a tail call

 JMP SetKeyLogger_b6    ; This instruction is never reached and has no effect
                        ; (it would populate the key logger table with the
                        ; controller button presses)