permanently with the desired capabilities. Only one option ROM can fit inside the HX-20 at a time, but it’s a powerful means of customizing the HX-20 for a desired application - without diminishing in any way its ability to run BASIC programs or to accept option cartridges.

Option cartridges also tailor the HX-20 for specific applica- tions. You can install a cartridge in moments, simply by sliding it into a recessed compartment in the case of the HX-20. Insert a program cartridge for one or more ready-to-run applications programs; or slide in the micro- cassette cartridge, which contains a complete microcassette recorder suitable for storing programs and data files.

If your applications require more memory than the HX-20 features, just attach an expansion unit, which virtually doubles the read - write memory and permanent memory of the system.

Should you decide to expand the capabilities of your HX-20 even further, you may connect it to such external devices as:

-an ordinary cassette recorder, for permanent storage of programs and data;

-a display controller, which enables the HX-20 to display text and graphics on your television set or on a video monitor;

-a printer, for full-page printouts of text and graphics;

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-a modem or acoustic coupler, to enable your HX-20 to communicate over telephone lines to other computers and networks such as CompuServe@ and The Source”;

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