exxos's Atari, Amiga & retro forum

czietz wrote: 24 Nov 2020 16:45 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.

czietz wrote: 24 Nov 2020 16:45 Either use a cache-aware OS or completely disable the cache.

Atarian Computing wrote: 01 Dec 2020 11:05 I couldn't find any information by searching. Does the TF536 support two IDE devices, i.e. primary and secondary?