Text: LoadNormalFont_b3

       Name: LoadNormalFont_b3                                       [Show more]
       Type: Subroutine
   Category: Text
    Summary: Call the LoadNormalFont routine in ROM bank 3
  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:
             * TT66 calls LoadNormalFont_b3


.LoadNormalFont_b3

 STA storeA             ; Store the value of A so we can retrieve it below

 LDA currentBank        ; If ROM bank 3 is already paged into memory, jump to
 CMP #3                 ; bank11
 BEQ bank11

 PHA                    ; Otherwise store the current bank number on the stack

 LDA #3                 ; Page ROM bank 3 into memory at $8000
 JSR SetBank

 LDA storeA             ; Restore the value of A that we stored above

 JSR LoadNormalFont     ; Call LoadNormalFont, 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

.bank11

 LDA storeA             ; Restore the value of A that we stored above

 JMP LoadNormalFont     ; Call LoadNormalFont, which is already paged into
                        ; memory, and return from the subroutine using a tail
                        ; call