| Start |
Size |
Chip |
Type |
Hardware |
Software Details |
| 0000 |
1K |
IC51,52 |
2114 |
Block zero RAM |
|
| 0400 |
1K |
|
|
Teletext VDU RAM |
0400-2700 are external bus accessed. |
| 0800 |
1K |
|
|
VDU CRT Controller |
|
| 0C00 |
5K |
|
|
Free (External) |
|
| 2000 |
1K |
|
|
Free (External) |
| 2000-21FF |
Catalogue Buffer |
| 2200-27FF |
Sequential File Buffers |
|
| 2400 |
1K |
|
|
Free (External) |
| 2800 |
1K |
IC10,11 |
2114 |
User RAM |
| 2800-28FF |
Floating Point Variables |
| 2900-2FFF |
User program area |
|
| 2C00 |
1K |
IC12,13 |
2114 |
User RAM |
| 3000 |
1K |
IC14,15 |
2114 |
User RAM |
| 3400 |
1K |
IC16,17 |
2114 |
User RAM |
| 3800 |
1K |
IC18,19 |
2114 |
User RAM |
| 3C00 |
1K |
|
|
Free (External) |
| 4000 |
16K |
|
|
Free (External) |
| 8000 |
1K |
IC42,43 |
2114 |
VDC Video RAM |
|
| 8400 |
1K |
IC40,41 |
2114 |
VDC Video RAM |
|
| 8800 |
1K |
IC38,39 |
2114 |
VDC Video RAM |
|
| 8C00 |
1K |
IC36,37 |
2114 |
VDC Video RAM |
|
| 9000 |
1K |
IC34,35 |
2114 |
VDC Video RAM |
|
| 9400 |
1K |
IC32,33 |
2114 |
VDC Video RAM |
|
| 9800 |
1K |
|
|
Free (External) |
|
| 9C00 |
1K |
|
|
Free (External) |
|
| A000 |
4K |
IC24 |
|
Optional Utility ROM |
|
| B000 |
1K |
IC25 |
8255 |
PPI |
|
| B400 |
1K |
PL8 |
|
Expansion (internal) |
|
| B800 |
1K |
IC1 |
6522 |
VIA |
|
| BC00 |
1K |
|
|
Free (internal) |
Good space for mapping a second 6522 |
| C000 |
4K |
IC20 |
|
Atom BASIC |
|
| D000 |
4K |
IC21 |
|
Optional Extension ROM |
|
| E000 |
4K |
|
|
Optional DOS ROM |
|
| F000 |
4K |
IC20 |
|
Assembler & COS |
|