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Combat demo: RunDemoFlightLoop

[NES version, Bank 0]

Name: RunDemoFlightLoop [Show more] Type: Subroutine Category: Combat demo Summary: Run a fixed number of iterations of the main flight loop for the combat demo Deep dive: Splitting the main loop in the NES version The NES combat demo
Context: See this subroutine in context in the source code References: This subroutine is called as follows: * PlayDemo calls RunDemoFlightLoop

Arguments: A The number of iterations of the main flight loop to run
.RunDemoFlightLoop STA LASCT ; Store the number of iterations in LASCT so we can ; access it after running the main flight loop .dlop1 JSR FlipDrawingPlane ; Flip the drawing bitplane so we draw into the bitplane ; that isn't visible on-screen JSR FlightLoop4To16 ; Display in-flight messages, call parts 4 to 12 of the ; main flight loop for each ship slot, and finish off ; with parts 13 to 16 of the main flight loop JSR DrawBitplaneInNMI ; Configure the NMI to send the drawing bitplane to the ; PPU after drawing the box edges and setting the next ; free tile number LDA iconBarChoice ; Set A to the number of the icon bar button that has ; been chosen from the icon bar (if any) JSR CheckForPause ; If the Start button has been pressed then process the ; pause menu and set the C flag, otherwise clear it DEC LASCT ; Decrement the iteration counter in LASCT BNE dlop1 ; Loop back to run the main flight loop again until we ; have run it the required number of times RTS ; Return from the subroutine