M7WE=0, M4RE=0, M3PE=0, M4WE=0, M7RE=0, M5WE=0, M6WE=0, M3UM=0, M5RE=0, M6RE=0, M3SM=00
Region Descriptor Alternate Access Control n
| M0UM | Bus master 0 user mode access control |
| M0SM | Bus master 0 supervisor mode access control |
| M0PE | Bus master 0 process identifier enable |
| M1UM | Bus master 1 user mode access control |
| M1SM | Bus master 1 supervisor mode access control |
| M1PE | Bus master 1 process identifier enable |
| M2UM | Bus master 2 user mode access control |
| M2SM | Bus master 2 supervisor mode access control |
| M2PE | Bus master 2 process identifier enable |
| M3UM | Bus master 3 user mode access control 0 (0): An attempted access of that mode may be terminated with an access error (if not allowed by another descriptor) and the access not performed. 1 (1): Allows the given access type to occur |
| M3SM | Bus master 3 supervisor mode access control 0 (00): r/w/x; read, write and execute allowed 1 (01): r/x; read and execute allowed, but no write 2 (10): r/w; read and write allowed, but no execute 3 (11): Same as user mode defined in M3UM |
| M3PE | Bus master 3 process identifier enable. 0 (0): Do not include the process identifier in the evaluation 1 (1): Include the process identifier and mask (RGDn.RGDAAC) in the region hit evaluation |
| M4WE | Bus master 4 write enable 0 (0): Bus master 4 writes terminate with an access error and the write is not performed 1 (1): Bus master 4 writes allowed |
| M4RE | Bus master 4 read enable. 0 (0): Bus master 4 reads terminate with an access error and the read is not performed 1 (1): Bus master 4 reads allowed |
| M5WE | Bus master 5 write enable 0 (0): Bus master 5 writes terminate with an access error and the write is not performed 1 (1): Bus master 5 writes allowed |
| M5RE | Bus master 5 read enable. 0 (0): Bus master 5 reads terminate with an access error and the read is not performed 1 (1): Bus master 5 reads allowed |
| M6WE | Bus master 6 write enable 0 (0): Bus master 6 writes terminate with an access error and the write is not performed 1 (1): Bus master 6 writes allowed |
| M6RE | Bus master 6 read enable. 0 (0): Bus master 6 reads terminate with an access error and the read is not performed 1 (1): Bus master 6 reads allowed |
| M7WE | Bus master 7 write enable 0 (0): Bus master 7 writes terminate with an access error and the write is not performed 1 (1): Bus master 7 writes allowed |
| M7RE | Bus master 7 read enable. 0 (0): Bus master 7 reads terminate with an access error and the read is not performed 1 (1): Bus master 7 reads allowed |