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Chapter 9
Specifications
This chapter provides information of interest to technically-
sophisticated users. If you are just learning about computers, ignore
this chapter. Turn instead to the Epson HX-20 BASIC Tutorial
and Reference Manual, and learn how to program your HX-20. For
detailed specifications, see the Epson HX-20 Technical Reference
Manual. All specifications are subject to change without notice.
Architecture
The HX-20 has two microprocessors for distributed and concurrent
I/O processing. The microprocessors (both 630l’s) communicate
with each other through their serial communications ports.
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