| Addressroom | physical | POKE 8 | function |
| 49152 - 65535 | RAM | 13 | HDIF System RAM |
| 14 | HDIF Data RAM | ||
| any other | Data or Megabyteboard (2) | ||
| 40960 - 49152 | RAM, EEPROM | 0 - 255 | additional RAM |
| 32768 - 40959 | RAM | 0 - 255 | additional RAM (Charsets) |
| 24576 - 32767 | RAM | 0 - 255 | BASIC RAM |
| 16384 - 24575 | |||
| 8192 - 16383 | RAM, ROM | ||
| 1 | Floppydisccontroller | ||
| 5 - 7 | 4x8k RAM | ||
| 8 - 11 | 4x8k EPROM | ||
| 13 - 15 | Harddisc: MeFisDOS | ||
| 0 - 8192 | ROM | 0 - 255 | System ROM (1) |
| (1) | more 4 banks selectable with jumpers |
| (2) | Megabyteboard is addressed by POKE 9 at 255 banks = 4 MB total |
| (3) | POKE 8= 0 - 255 means: value doesn't care |