Function keys
Incorporating the "Start", "Select" and "Option" key
| Keys Pressed | PEEK(53279) | Binary Code |
| None | 7 | 00000111 |
| START | 6 | 00000110 |
| SELECT | 5 | 00000101 |
| START and SELECT | 4 | 00000100 |
| OPTION | 3 | 00000011 |
| START and OPTION | 2 | 00000010 |
| SELECT and OPTION | 1 | 00000001 |
| All Three | 0 | 00000000 |
Incorporating the "Help" key
To clear the HELP key, POKE 732,0. To read that key. PEEK(732). A 17 represents the HELP key, an 81 represents SHIFT - HELP, and a 145 means CONTROL - HELP
| Keys Pressed | PEEK(732) |
| HELP | 17 |
| SHIFT - HELP | 81 |
| CONTROL - HELP | 145 |