The operator interface is command line based and prompts for commands in its text window. Note that case matters. All commands have to be followed by the Enter key to execute the command. You can type in “help” or “?” to find out what commands are available:

All commands have an abbreviated version of only one or two letters. For example “lt” is the same as “load_tape”, or “st” is the same as “show_tape”.

To get help for the parameters of the individual commands type help and the command name. For example:

Most commands require parameters which identify the peripheral you want to interact with using the following types of information:

• channel number
• equipment number
• unit number (only for tape drives)

Some peripherals require additional parameters:

• file name (card reader and tape drives)
• read/write mode flag does the same as the write enable ring for a real tape drive (‘w’ is equivalent to ring in; ‘r’ is equivalent to ring out)

Some commands (e.g load_tape or load_card) required a file name specifying what file to use. The path name of the file must not contain spaces.

To shut down the emulation type the following in the operator window:

shutdown

The emulation will terminate cleanly and flush all pending buffers to disk. Do not kill the emulation by any other means.