Skip to navigation

⌂ ∞ Elite on the BBC Micro and NES

Sound: EnableSound

[NES version, Bank 6]

       Name: EnableSound                                             [Show more]
       Type: Subroutine
   Category: Sound
    Summary: Enable sounds (music and sound effects)

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




.EnableSound

 LDA playMusic          ; If playMusic = 0 then the music has been disabled by
 BEQ enas1              ; note command $FE, so jump to enas1 to leave the value
                        ; of enableSound alone and return from the subroutine
                        ; as only a new call to ChooseMusic can enable the music
                        ; again

 LDA enableSound        ; If enableSound is already non-zero, jump to enas1 to
 BNE enas1              ; leave it and return from the subroutine

 INC enableSound        ; Otherwise increment enableSound from 0 to 1

.enas1

 RTS                    ; Return from the subroutine