Checksum improvements#7

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AntiSol wants to merge 2 commits intomist64:masterfrom

AntiSol:checksum_improvements

Commits on Nov 8, 2023

improvements and new features for checksum.py
AntiSol
committed
use /dev/null to not produce empty rom.bin, switch to python3, add -y param to checksum.py calls
AntiSol
committed