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⌂ ∞ Elite on the BBC Micro and NES

Utility routines: WaitFor2NMIs

[NES version, Bank 7]

       Name: WaitFor2NMIs                                            [Show more]
       Type: Subroutine
   Category: Utility routines
    Summary: Wait until two NMI interrupts have passed (i.e. the next two
             VBlanks)

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * FadeToBlack calls WaitFor2NMIs
             * FadeToColour calls WaitFor2NMIs




 Returns:

   A                    A is preserved



.WaitFor2NMIs

 JSR WaitForNMI         ; Wait until the next NMI interrupt has passed (i.e. the
                        ; next VBlank)

                        ; Fall through into WaitForNMI to wait for the second
                        ; NMI interrupt