日本公司Epson在1981年推出的一款便携式电脑——HX 20，这款便携式电脑整机重量仅为1.7Kg，电脑用户完全可以拿起来就走，这也是全球第一款具备便携能力的电脑产品，以现在之眼光来看当年这款产品的话，这确确实实就是全球第一款具备UMPC概念的产品。
爱普生HX-20的全部家当
HX-20尺寸28.4×21.3×4.4厘米，不仅有完整的QWERTY键盘、显示器、存储设备，甚至还整合了迷你打印机，同时采用的镍可充电镉蓄电池能让HX-20续航达40小时之久，而这一点也正是现在的笔记本和UMPC产品最欠缺的特性。
不算大一只手就可以拿
HX-20的显示器是一个单色液晶屏，可显示4行文字，每行20个字。点阵打印机位于屏幕左侧，可打印5.6厘米款的纸张，每行24个字，打印速度每秒17个字。屏幕右侧则是可拆卸的磁带存储器，数据读写速度1.3Kbps，30分钟长的磁带可保存大约50KB数据。
此外，HX-20还可以通过上方的耳机、麦克风接口外接磁带播放器，并有两个RS-232串行接口，速度分别为38.4Kbps和4.8Kbps，甚至还可以接上条形码阅读器。这款产品生命相当之长，一直卖到了1987年。
简介编辑本段回目录
Superbly designed and engineered, the Epson HX20 can be considered as the first true portable computer. It was the only package available at the time which included a microcassette drive, a mini-printer and a LCD display.
A company call RealVoice sold Epson HX-20 computers with a custom expansion box bolted to the side that turned the computer into an Agumentative Communication Device (ACD) for use by people with disabilities that caused extreme speech impairment.
The ACD software worked in several modes, and customized settings and special vocabularies could be saved on the tape, or printed on the printer. It could accept keyboard input, a special "picture keyboard", or a simple switch that could be used for "scanning" or morse code imput.
Regardless of the input method, the RealVoice produced clear human-sounding speech. I have an HX-20 with the RealVoice module and it still works in 2006!
主要参数编辑本段回目录
 |  |
| NAME | HC / HX-20 |
| MANUFACTURER | Epson |
| TYPE | Home Computer |
| ORIGIN | Japan |
| YEAR | 1982 |
| BUILT IN LANGUAGE | Microsoft BASIC interpreter |
| KEYBOARD | Full stroke 68 key with 13 function keys |
| CPU | Two Hitachi 6301 |
| SPEED | 0.614 MHz |
| RAM | 16 KB (up to 32 KB) |
| ROM | 32 KB (up to 64 KB) |
| TEXT MODES | 4 lines of 20 characters (in a window of 255 x 255 characters) |
| GRAPHIC MODES | 120 x 32 dots |
| COLORS | Monochrome LCD |
| SOUND | Beeper |
| SIZE / WEIGHT | 29 (W) x 21.5 (D) x 4.4 (H) cm / 1.7 kg |
| I/O PORTS | RAM extension port, RS232 (for printer), Serial, Bar code. |
| BUILT IN MEDIA | Small analog 1300 baud microcassette drive (optional) |
| POWER SUPPLY | 4 AA Ni-Cd batteries or AC adapter |
| PERIPHERALS | up to 4 3.5'' floppy disc units, display controller, acoustic coupler |
| PRICE | ?80 2990 FF (France, january 1988) |
参考文献编辑本段回目录
http://tech.163.com/digi/07/1227/00/40M9NQOF001628BV.html
