Skip to navigation

Save and load: CHK2

[BBC Micro cassette version]

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 Variations: See code variations for this variable in the different versions References: This variable is used as follows: * QU5 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 script. The offset of this byte within a saved commander file is also shown (it's at byte #74).
.CHK2 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