The Sharp PC-5000 was a pioneering laptop computer, announced by Sharp Corporation of Japan in 1983. Like the GRiD Compass, which preceded it, and its contemporary the Gavilan SC, it employed a clamshell design in which the display closes over the keyboard.
The PC-5000 was largely IBM PC-compatible, with the same 4.77-MHz Intel 8088 processor as the PC, and ran MS-DOS 2.0 (in ROM). It had 128 kilobytes of internal memory (it was one of the few computers to use bubble memory), which could be expanded by the use of plug-in cartridges. The cartridge slots also accepted ROM cartridges containing software, such as the Extended BASIC programming language and the EasyPac software suite, which contained the EasyWrite II word processor, EasyReport reports program, and EasyComm terminal software for use with the internal modem. It featured a 640×80-pixel (80-character by 8-line) LCD display, a full-transit keyboard, and an external dual 5.25-inch floppy disk drive. A notable feature of the computer was its built-in thermal printer, which could also be purchased separately and attached to the machine. It is perhaps due to this attachment that the case design of the PC-5000 owes much to that of electronic typewriters of its time.
While far more portable than the popular Compaq Portable or Osborne 1 computers, the machine weighed 5 kg (11 lb).
第一次出现了液晶屏幕编辑本段回目录
Osborne 1不能称为笔记本的另外一个理由是，它采用的屏幕是CRT屏幕，而非平板显示屏，虽然并没有规定说采用平板显示屏是笔记本的必要条件，但要让笔者从心理上接受一台采用CRT作屏幕的笔记本还有点困难。
到1982年，William Moggridge设计的GRiD Compass 1101上市，这台机器采用了新奇的蛤壳(Clamshell)外形设计，向真正的笔记本电脑又迈进了一步。GriD Compass 1101的突破在于采用了等离子平板屏幕，当屏幕关闭时正好对着键盘，这已经接近现在笔记本的设计。
到1983年，在Sharp PC-5000上第一次出现了液晶屏幕，液晶屏幕一经面世，就体现出了它强大的优势。轻薄以及省电，正是采用电池供电的 便携式电脑梦寐以求的屏幕特质。后来，在微软Bill Gates等人的大力推广下，液晶屏渐渐在笔记本中占据了统治地位。
当然，液晶屏的发展经历一个漫长的过程，在这里不一一详述。简言之，要把液晶屏幕做大可不是一件容易的事，这就是为什么笔记本电脑发展了10多年，屏幕仍然没能突破10英寸的原因。
主要参数编辑本段回目录
 |  |
| NAME | PC-5000 |
| MANUFACTURER | Sharp |
| TYPE | Portable |
| ORIGIN | Japan |
| YEAR | 1983 |
| BUILT IN LANGUAGE | Microsoft Basic 1.0 |
| KEYBOARD | Full-stroke 72 keys with 8 function keys and arrow keys (English, German and French versions) |
| CPU | Intel 8088 |
| SPEED | 4.77 Mhz |
| RAM | 128k, up to 256k (Magnetic Bubble Memory, 64k and 128k modules) |
| ROM | 192k (64k system program + 128k for Basic/MS-DOS) |
| TEXT MODES | 80 chars x 8 lines (LCD screen) |
| GRAPHIC MODES | 640 x 80 dots |
| COLORS | Monochrome |
| SOUND | Beeper |
| SIZE / WEIGHT | 325 (W) x 305 (D) x 85 mm (H) / 4.5 Kg |
| I/O PORTS | Bubble memory cartridge slot Serial port (proprietary) RS232c port Bus expansion port Tape-recorder |
| OS | MS-DOS |
| POWER SUPPLY | 12vdc 850mA / + -(O- - |
| PERIPHERALS | Built-in thermal transfer printer (optional), double 5''1/4 disk-drive (360k), numeric keypad |
| PRICE | 3506  (France, 1985)?195 (U.K., 1984) 350 000 yens (Japan, 1985) |
相关链接编辑本段回目录
参考文献编辑本段回目录
http://www.old-computers.com/MUSEUM/computer.asp?c=476&st=1
http://en.wikipedia.org/wiki/Sharp_PC-5000
http://www.atarimagazines.com/creative/v10n1/55_The_Sharp_PC5000_a_desk.php
http://en.wikipedia.org/wiki/Sharp_PC-5000
http://www.atarimagazines.com/creative/v10n1/55_The_Sharp_PC5000_a_desk.php
