Here is a list of available commands:
*CAT Catalogues all file names on cassette, and displays them on the screen. Can be shortened to *.
*SAVE Saves a section of memory onto tape. *SAVE "File" 1000 10FF 102A will save a page of memory, called File, from address &1000 to &10FF, and an execution address (for use by *RUN) of 102A. If the execution address is omitted, it is assumed to be equal to the start address.
*RUN Loads and runs a program stored by *SAVE. *RUN "File" will load and run the example given in *SAVE above.
*LOAD Loads a file and stores it in memory at a specified address. *LOAD "Game" 2000 will load from tape a file called Game, and store this at location &2000.
*OPT Determines the computer's reaction to errors during cassette operations.
*OPT1,X Controls the error messages given.
X = 0 Gives no messages.
X = 1 Gives short messages (as normal).
X = 2 Gives long messages, including load and execution addresses.
*OPT2,X Controls the computer's action.
X = 0 Lets the computer ignore all errors, and carry on regardless. Messages can still be given.
X = 1 The computer asks you to try again by rewinding the tape (as normal).
X = 2 The computer aborts the operation.
*OPT3,X Sets the inter-block gap - the time delay between each page of memory stored on the tape. X determines the gap in tenths of a second. This only applies to PRINT# and BPUT#. The gap on SAVE is fixed at 0.6 seconds.
*OPT On its own sets all the values to normal.
*SPOOL Used for saving a program listing or results (as long as they are ASCII characters) to cassette or disc as a text file. Thus *SPOOL FRED opens a file called FRED on either tape or disc. Whatever characters appear on the screen after that (e.g. a program listing called up by LIST, or one you enter on the keyboard) will be saved to FRED as a text file. To close the file, type *SPOOL RETURN at the end.
*EXEC Loads a file from tape, as input rather than as a program. Used for loading a file which has been *SPOOLed.
*MOTOR Used to turn the cassette motor relay on or off. *MOTOR0 for off, *MOTOR1 for on.
*KEY Programs a user-definable function key.
*FX A family of Operating System commands which are described in Appendix D.
*HELP Gives version numbers of current software.