| Base | Segment description | Segment name | Segment class | Segment group |
| 1000 | Original code segments | SEGxxx | STUNTSC | |
| 3B77 | Original data segment | DSEG | STUNTSD | DGROUP |
| 4649 | New data generated by the C compiler | _DATA | DATA | DGROUP |
| ? | Stack and uninitialized data | STACK, SEG041, _BSS | STACK and BSS | DGROUP |
| ? | New code generated by the C compiler | _TEXT and *_TEXT | CODE |
Segment ordering is controlled by wlinks ORDER directive in the makefile.
The medium model dictates that DGROUP can be max 64k.