Save and load: CHK2

       Name: CHK2                                                    [Show more]
       Type: Variable
   Category: Save and load
    Summary: Second checksum byte for the saved commander data file
  Deep dive: Commander save files
             The competition code
    Context: See this variable in context in the source code
 References: This variable is used as follows:
             * DFAULT uses CHK2
             * SVE uses CHK2


 Second commander checksum byte. If the default commander is changed, a new
 checksum will be calculated and inserted by the elite-checksum.py script.

 The offset of this byte within a saved commander file is also shown (it's at
 byte #74).


.CHK2

IF _IB_DISK

 EQUB $03 EOR $A9       ; The checksum value for the default commander, EOR'd
                        ; with $A9 to make it harder to tamper with the checksum
                        ; byte, #74

ELIF _SOURCE_DISK OR _4AM_CRACK

 EQUB 0                 ; Placeholder for the checksum in byte #74

ENDIF