The original reason to move PLOT routine into its original position was to provide support for unofficial $E50C address:

- it is well known: https://www.lemon64.com/forum/viewtopic.php?t=3296&amp%3Bstart=15
                    https://sys64738.org/2019/05/c64-bedtime-coding-eng-printing-08/
- 'Duotris' game calls $E50C during startup screen initialization