https://www.callapple.org/modern-apple-computing/announcing-prodos-2-4-3-for-all-apple-ii-computers/
ProDOS 2.4.3 is a minor release with bug fixes and updates. It replaces ProDOS 2.4, ProDOS 2.4.1 and ProDOS 2.4.2. Bugs fixed: Fix crash when starting...
for allapple iiannouncingprodoscomputers