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⌂ ∞ Elite on the BBC Micro and NES

Sound: BEEP_b7

[NES version, Bank 7]

       Name: BEEP_b7                                                 [Show more]
       Type: Subroutine
   Category: Sound
    Summary: Call the BEEP routine in ROM bank 7
  Deep dive: Splitting NES Elite across multiple ROM banks

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * EQSHP calls BEEP_b7
             * InputName calls BEEP_b7
             * Main flight loop (Part 11 of 16) calls BEEP_b7
             * refund calls BEEP_b7




.BEEP_b7

 LDA currentBank        ; Fetch the number of the ROM bank that is currently
 PHA                    ; paged into memory at $8000 and store it on the stack

 LDA #0                 ; Page ROM bank 0 into memory at $8000
 JSR SetBank

 JSR BEEP               ; Call BEEP, now that it is paged into memory

 JMP ResetBank          ; Fetch the previous ROM bank number from the stack and
                        ; page that bank back into memory at $8000, returning
                        ; from the subroutine using a tail call