Skip to navigation

⌂ ∞ ▽ Elite on the 6502

Sound: MakeSoundsAtVBlank

[NES version, Bank 7]

       Name: MakeSoundsAtVBlank                                      [Show more]
       Type: Subroutine
   Category: Sound
    Summary: Wait for the next VBlank and make the current sounds (music and
             sound effects)

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * SendDataNowToPPU calls MakeSoundsAtVBlank
             * SendViewToPPU calls MakeSoundsAtVBlank




 Returns:

   X                    X is preserved



.MakeSoundsAtVBlank

 TXA                    ; Store X on the stack, so we can retrieve it below
 PHA

 JSR WaitForVBlank      ; Wait for the next VBlank to pass

 JSR MakeSounds_b6      ; Call the MakeSounds routine to make the current sounds
                        ; (music and sound effects)

 PLA                    ; Restore X from the stack so it is preserved
 TAX

 RTS                    ; Return from the subroutine