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⌂ ∞ ▽ Elite on the 6502

PPU: SetupPPUForIconBar

[NES version, Bank 7]

       Name: SetupPPUForIconBar                                      [Show more]
       Type: Subroutine
   Category: PPU
    Summary: If the PPU has started drawing the icon bar, configure the PPU to
             use nametable 0 and pattern table 0, while preserving A
  Deep dive: The split-screen mode in NES Elite

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * BR1 calls SetupPPUForIconBar
             * BuyAndSellCargo calls SetupPPUForIconBar
             * ClearDashEdge calls SetupPPUForIconBar
             * CLYNS calls SetupPPUForIconBar
             * CopyCommanderToBuf calls SetupPPUForIconBar
             * CopyNameBuffer0To1 calls SetupPPUForIconBar
             * DrawImageFrame calls SetupPPUForIconBar
             * DrawScreenInNMI calls SetupPPUForIconBar
             * DrawSmallBox calls SetupPPUForIconBar
             * DrawSpaceViewInNMI calls SetupPPUForIconBar
             * Main flight loop (Part 3 of 16) calls SetupPPUForIconBar
             * MoveInLeftColumn calls SetupPPUForIconBar
             * MoveInMiddleColumn calls SetupPPUForIconBar
             * MoveInRightColumn calls SetupPPUForIconBar
             * NLIN2 calls SetupPPUForIconBar
             * PAUSE2 calls SetupPPUForIconBar
             * PrintEquipment calls SetupPPUForIconBar
             * qv calls SetupPPUForIconBar
             * RemoveShip calls SetupPPUForIconBar
             * SFS1 calls SetupPPUForIconBar
             * TITLE calls SetupPPUForIconBar
             * TT151 calls SetupPPUForIconBar
             * TT167 calls SetupPPUForIconBar
             * TT26 calls SetupPPUForIconBar
             * WaitForNoDirection calls SetupPPUForIconBar
             * ZERO calls SetupPPUForIconBar




.SetupPPUForIconBar

 PHA                    ; Store the value of A on the stack so we can retrieve
                        ; it below

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

 PLA                    ; Retrieve the value of A from the stack so it is
                        ; unchanged

 RTS                    ; Return from the subroutine