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 abil- ity 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 con- tains 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 expan- sion unit, which virtually dou- bles the read-write memory and permanent memory of the system.
-an ordinary cassette recorder, for permanent storage of pro- grams 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 print- outs of text and graphics; 1- I -a modem or acoustic coupler, to enable your HX-20 to com- municate over telephone lines to other computers and net- works such as CompuServe@ and The Source”; Should you decide to expand the capabilities of your HX-20 even further, you may connect it to such external devices as: 3