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by erikarn 1288 days ago
that's why the later OS releases after amiga/commodore imploded extended some of the memory APIs to say "This needs to be globally visible". That way you'd allocate message memory in globally accessible memory and the MMU could do "things".

(Not that I'm a fan of that solution, just saying, they had to hack around it.)

https://wiki.amigaos.net/wiki/Exec_Memory_Allocation

(I don't do later amigaos things though :-)