Thanks! That's enough of an explanation for meczietz wrote: ↑Tue Nov 24, 2020 4:45 pm Sidenote: The Atari / TOS also requires "write allocate" to be active on the 68030 or it will crash sooner or later. I could go into a (long) explanation why this happens, but for now I'm just going to quote the UM: "WRITE ALLOCATE [...] The supervisor should set this bit when it shares data with the user task". I.e., it's required when user and supervisor mode access the same memory locations, which obviously happens during TOS calls.
I'm giving this quote a million thumbs up!