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
.CHK2EQUB&03EOR&A9\ The checksum value for the default commander, EOR'd\ with &A9 to make it harder to tamper with the checksum\ byte, #74