Epson HX-20 BASIC programmable calculator

General specifications
Type BASIC programmable calculator
Production years 1981 - -
New price USD 795
Operating system n.a.
Chipset/CPU Two Hitachi 6301 @ 0.614MHz
I/O RS-232 serial, tape, expansion, ROM
Performance index 0
Entry method BASIC expressions
Precision 6 digits
Advanced functions

Forensic result -

BASIC programmable calculator: Epson HX-20
Programming model BASIC
Programming features

Program display Text
Program editing Text editor
Programming 12891 bytes
Data 12891 bytes
Secondary 0
Type LCD
Size 120×32 pixels
L×W×H 216×292×51 mm
Weight 1358 g
Batteries 4×NiCd C
External power 6VDC
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The Epson HX-20 (also known as the HC-20) is generally regarded as the first laptop computer, announced in November 1981, although first sold widely in 1983. Hailed by BusinessWeek magazine as the "fourth revolution in personal computing", it is generally considered both the first notebook and handheld computer and it is for this reason that it is highly prized among collectors.

With about the footprint of an A4 size page, the Epson HX-20 features a full-transit keyboard, rechargeable nickel-cadmium batteries, a built-in 120 × 32-pixel LCD (smaller than that on many mobile phones today) which allowed 4 lines of 20 characters, a calculator-size dot-matrix printer, the EPSON BASIC programming language, 16 Kb RAM expandable to 32 Kb and a built-in microcassette drive. It uses a proprietary operating system, which consists of the Epson Basic interpreter and a system monitor program, and weighs approximately 1.6 kg. Known colours of the machine are silver and cream, while some prototypes were dark grey. The HX-20 was supplied with a grey carry case. An external acoustic coupler, the CX-20, was available for the HX-20, as was an external floppy disk drive, the TF-20, and an external speech synthesis Augmentative Communication Device (ACD), ‘RealVoice’. The battery life of the HX-20 was approximately 50 hours.

(From wikipedia)


BASIC programmable calculator: Epson HX-20

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This page was last modified on November 28th, 2009

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