.TT66_b0 STA storeA ; Store the value of A so we can retrieve it below 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 LDA storeA ; Restore the value of A that we stored above JSR TT66 ; Call TT66, 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 callName: TT66_b0 [Show more] Type: Subroutine Category: Drawing the screen Summary: Call the TT66 routine in ROM bank 0 Deep dive: Splitting NES Elite across multiple ROM banks
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Subroutine ResetBank (category: Utility routines)
Retrieve a ROM bank number from the stack and page that bank into memory at $8000
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Subroutine SetBank (category: Utility routines)
Page a specified ROM bank into memory at $8000
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Subroutine TT66 (category: Drawing the screen)
Clear the screen and set the new view type
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Variable currentBank in workspace ZP
Contains the number of the ROM bank (0 to 6) that is currently paged into memory at $8000