Am I sure?
I'm no expert, although I have looked into the memory layout of RiscOS because I was interested.
It may be that over the different versions of RiscOS, new features were included, but Wikipedia indicates RiscOS 2 did not have virtual addressing, and I saw nothing in the remaining history to indicate that it was added later.
It is quite true that MEMC did have memory protection capabilities, but from what I have read, it was not used in the earlier versions of RiscOS, although I am sure that it was used in RISC iX.
I find it hard to believe that the current versions of RiscOS do not have memory protection, but my original post was really about RiscOS under Acorn's custodianship.
Biting the hand that feeds IT
