SS.Pos Get Status
From NitrOS-9
Gets the current file position (RBF-supported devices only)
| Entry Conditions | |
| A | path number |
| B | SS.Pos ($05) |
| Exit Conditions | |
| X | most significant 16 bits of the current file positions |
| U | least significant 16 bits of the current file position |
| Error Output | |
| CC | carry set on error |
| B | error code |
