Save and load: ResetSaveBuffer

       Name: ResetSaveBuffer                                         [Show more]
       Type: Subroutine
   Category: Save and load
    Summary: Reset the commander file buffer at BUF to the default commander
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * CopyCommanderToBuf calls ResetSaveBuffer
             * CopyCommanderToBuf calls via ResetSaveBuffer+1


 Returns:

   A                    A is preserved


 Other entry points:

   ResetSaveBuffer+1    Omit the initial PHA (so we can jump here if the value
                        of the preserved A is already on the stack from another
                        routine)


.ResetSaveBuffer

 PHA                    ; Store the value of A on the stack so we can restore it
                        ; at the end of the subroutine

 LDX #78                ; We are going to copy 79 bytes, so set a counter in X

.resb1

 LDA NA2%,X             ; Copy the X-th byte of the default commander in NA2% to
 STA BUF,X              ; the X-th byte of BUF

 DEX                    ; Decrement the byte counter

 BPL resb1              ; Loop back until we have copied all 79 bytes

 PLA                    ; Restore the value of A that we stored on the stack, so
                        ; A is preserved

 RTS                    ; Return from the subroutine