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This value is used with the memory management SWIs to specify the access rights to the page, in terms of how much access privileged code (i.e. modules running in SVC mode) and unprivileged code (i.e. applications running in USR mode) has to the contents of the page.
Value | Meaning |
---|---|
0 | Full read/write access in both privileged and unprivileged CPU modes |
1 | Read/write in privileged modes, read-only in unprivileged modes |
2 | |
3 | |
4-15 | Reserved |
Prior to RISC OS 3.5, access mode 2 3 was the same as access mode 3, 2, i.e. read/write in privileged modes and inaccessible in unprivileged modes.