Epson HX-20 with Hard Case

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.

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 which allowed 4 lines of 20 characters, a calculator-size dot-matrix printer, the EPSON BASIC programming language, two Hitachi 6301 CPUs at 614 kHz which is essentially a souped up Motorola 6801, 16 kB RAM expandable to 32 kB, two RS-232 ports at a maximum of 4800 bits/s for the first 8-pin DIN intended for modem or serial printer with the second port capable of 38400 bits/s using a 5-pin DIN connector which was mainly for use with external floppy drive and video display an early concept of docking station, a 300 bit/s acoustic coupler was available, built-in micro-cassette drive, bar code reader connector. 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 or brown 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’. Another extension was the serially connected 40 x 24 character video. It used a special protocol, EPSP, which was also used by the external floppy disk drive. The battery life of the HX-20 was approximately 50 hours running BASIC and less using the microcassette, printer or RS-232.

Our HX-20 has a code of UA and a serial number of 029848. This unit was kindly donated by Helen Williams

Manufacturer: Epson
Date: November 1981

Magazines RELATED to Epson HX-20 with Hard Case in our Library

Item Manufacturer Date
Personal Computer World - December 1982 December 1982
Personal Computer World - July 1983 July 1983
Practical Computing - October 1983 October 1983
Practical Computing - November 1983 November 1983
Practical Computing - January 1984 January 1984

Other Systems Related To Epson HX-20 with Hard Case:

Item Manufacturer Date
Epson HX-20 Epson November 1981
Epson Executive HX-20 Epson 1982
Epson QX-10 Epson 1983
Epson PX-8 Epson 1984
Telsoft Epson PX-8 Computer + Epson P80-X Printer in Samsonite Case Telsoft Epson 1984
Epson PX-4 Epson 1985
Epson PX-4B Epson 1985
Epson HC-20 (HX-21-UA) Epson 19th May 1986
Epson Equity LT with soft case Epson 1989
Epson Equity LT Epson 1989
Epson PC-Portable Q150A Epson 1989

This exhibit has a reference ID of CH16828. Please quote this reference ID in any communication with the Centre for Computing History.

 

Epson HX-20 with Hard Case

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