| COMMAND | FUNCTION |
| NEW | Clears OS and program |
| NEW# | Clears BASIC but leaves OS |
| NEW* | Initialises OS. |
| LOAD* | Load first program. |
| LOAD*"n:file" | Loads specified file (n is optional) |
| LOAD*"n:file", start, length | Load machine code. |
| SAVE*"n:file" | Save file |
| SAVE*"n:file"LINE s | Save BASIC with autorun |
| SAVE*"n:file", st, len, runadd | Save code with autorun. |
| SAVE# | Save with replace, use above parameters |
| VERIFY*"n:file" | Verify program/machine code |
| MERGE*"n:file" | Merge Basic |
| ERASE*"n:file" | Erase |
| MOVE*"n:file1" TO "n:file2" | copy file1 TO file2 |
| CAT#"n:" | set default drive eg CAT # "a:" |
| CAT*"n:" | Display directory (from Ram). |
| FORMAT*"n:name" | Format wafer |
| FORMAT*"R";baud | set baud rate (default 1200) |
| OPEN#*stream;channel | Open stream to channnel |
| CLOSE#*stream | Close stream |
| CLEAR* | Close all streams |
| CLS* | set screen to default colours. |
No network and drives are always a: or b: (a: default), default becomes last drive accessed.