Geometry Control Register
| D2C_LIMNENABLE | Limiter N enable Bit 5: Limiter 6 enable Bit 4: Limiter 5 enable Bit 3: Limiter 4 enable Bit 2: Limiter 3 enable Bit 1: Limiter 2 enable Bit 0: Limiter 1 enable |
| D2C_QUADNENABLE | Quadratic coupling N enable Bit 8: Quadratic coupling 3 enable Bit 7: Quadratic coupling 2 enable Bit 6: Quadratic coupling 1 enable |
| D2C_LIMNTHRESHOLD | Limiter N threshold enable Bit 14: Limiter 6 threshold enable Bit 13: Limiter 5 threshold enable Bit 12: Limiter 4 threshold enable Bit 11: Limiter 3 threshold enable Bit 10: Limiter 2 threshold enable Bit 9: Limiter 1 threshold enable |
| D2C_BAND1ENABLE | Band filter N enable Bit 16: Band filter 2 enable Bit 15: Band filter 1 enable |
| D2C_UNION12 | Combine 1/2 as union (+) otherwise intersect (*) |
| D2C_UNION34 | Combine 3/4 as union (+) otherwise intersect (*) |
| D2C_UNION56 | Combine 5/6 as union (+) otherwise intersect (*) |
| D2C_UNIONAB | Combine (12)/(34) as union |
| D2C_UNIONCD | Combine (AB)/(56) as union |
| D2C_SPANABORT | Enable span abort |
| D2C_SPANSTORE | Enable span store |
| D2C_LIMITERPRECISION | Limiter precision is increased by 6 (10.22) |