On the ATARI 1200XL there are 4 function keys named F1 to F4
| Function Key | produces |
|---|---|
| F1 | Cursor up |
| F2 | Cursor down |
| F3 | Cursor left |
| F4 | Cursor right |
| Shift F1 | Cursor Home |
| Shift F2 | Cursor End |
| Shift F3 | Cursor to beginning of line |
| Shift F4 | Cursor to end of line |
| CTRL F1 | toggles Keyboard enable/disable |
| CTRL F2 | toggles DMA enable/disable |
| CTRL F3 | toggles Key-Click |
| CTRL F4 | toggles Standard/International character set |
| Shift CTRL F1 | ignored |
| Shift CTRL F2 | ignored |
| Shift CTRL F3 | ignored |
| Shift CTRL F4 | ignored |