M7WE=0, M5RE=0, M3SM=00, M6RE=0, M5WE=0, M6WE=0, M4RE=0, M3PE=0, M4WE=0, M3UM=0, M7RE=0
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 |