| Notes | Address | Name | Contents | |
|---|---|---|---|---|
| 2 | 23730 | RAMTOP | Address of last byte of BASIC system area. | |
| 23730 | 5CB2 | (IY+$78) | RAMTOP lo |
| 23731 | 5CB3 | (IY+$79) | RAMTOP hi |
Notes: This 16-bit address is the last byte of system area. Any RAM that follows this is reserved for the user. It is possible to give the system more room by raising this value using the CLEAR command. For example CLEAR 65535 on a 48K machine.