.PAS1_b0 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 PAS1 ; Call PAS1, 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: PAS1_b0 [Show more] Type: Subroutine Category: Missions Summary: Call the PAS1 routine in ROM bank 0 Deep dive: Splitting NES Elite across multiple ROM banksContext: See this subroutine in context in the source code References: This subroutine is called as follows: * PAUSE calls PAS1_b0
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Subroutine PAS1 (category: Missions)
Display a rotating ship at space coordinates (0, 100, 256) and scan the controllers
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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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Variable currentBank in workspace ZP
Contains the number of the ROM bank (0 to 6) that is currently paged into memory at $8000