Answered on spectrumComuting. Also USR 0 means 48k mode with paging enabled. Some hardware and emulators use it to load programs.
thealfest
Creator of
Recent community posts
Fixed USR 0 incompatibility and the falling coin crash bug.
https://zxart.ee/eng/software/games/arcade/platform/action-platformers/perseus/perseus-eng-fix/
Mission 9 is all about speedrunning, it's hard enough even with infinite energy. Just try to do it that way, it's still hard, but it's a different type of gameplay. It's not about fighting, it's about avoiding fights and knowing fast routes. But I can build a special version for you with 999 seconds if you like :)
I do not consider it a `bug`, it even makes more sense than 999s in the speccy version, because each mission is harder than the previous one and has less time. I even added a secret mission 10 to speccy128k version which is mission 9 with 500s time limit. It is completable if visiting a secret room and taking 2 tape pieces from a special stash. Also I wanted all the missions to remain as they were in the original so that the results/records would be comparable. Actually the game video on this page shows such a walkthrough. It is hard but doable.








