Check the 1541 speed. I tried 1541 speed test (2024 version).
Over 320 RPM it does not work.
In denise it works up to 340 RPM (which is a useless and crazy speed anyhow), so I doubt it's my program fault.
I am opening this ticket only because the last time I checked it was working up to 340 also in VICE.
latest version: https://github.com/Zibri/C64-1541-Speed-Test/blob/master/rpm2024.prg
(not much changed anyways with the previous one.. just perfected the IEEE math and got a better result.. but we are talking about 1/100 or RPM) :D
it seems to be wrong in the GUI, max_rpm is 320.0 now
Yes, need to fix the UI for this... ~320 is also what you'll get max. on a real drive
fixed in r45376