This directory tree contains **system codes** and contains

| File | Docu | Comments |
| --------- | --------- | ------- |
| [blink.mac](blink.mac) | - | _blinking lights_ demo |
| [memclr.mac](memclr.mac) | - | clear memory |
| [noboot.mac](noboot.mac) | - | boot blocker (for disk block 0) |
