| Entry | |
|---|---|
| R0 | 16 (&10), and flags |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Base of area |
| R2 | Address space allocated for area |
| R3 | Actual memory used by area |
The purpose of this call is to return information on the selected area, rounded to a whole number of pages, or zero if not present.