Skip to navigation

⌂ ∞ ▽ Elite on the 6502

Start and end: DrawBigLogo_b4

[NES version, Bank 7]

       Name: DrawBigLogo_b4                                          [Show more]
       Type: Subroutine
   Category: Start and end
    Summary: Call the DrawBigLogo routine in ROM bank 4
  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:
             * ChooseLanguage calls DrawBigLogo_b4




.DrawBigLogo_b4

 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 #4                 ; Page ROM bank 4 into memory at $8000
 JSR SetBank

 JSR DrawBigLogo        ; Call DrawBigLogo, 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