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The 80286
In 1982, Intel introduced the 80286. For the first time, Intel did not simultaneously introduce an 8-bit bus version of this processor (ala 80288). The 80286 introduced some significant microprocessor extensions. Intel continued to extend the instruction set; but more significantly, Intel added four more address lines and a new operating mode called "protected mode." Recall that the number of address lines directly relates to amount of physical that can be addressed by the microprocessor. The 8086, 8088, 80186, and 80188 all contained 20 address lines, giving these processors one megabyte of addressibility (2^20 = 1MB). The 80286, with its 24 address lines, gives 16 megabytes of addressibility (2^24 = 16 MB).
For the most part, the new instructions of the 80286 were introduced to support the new protected mode. Real mode was still limited to the one megabyte program addressing of the 8086, et al. For all intents and purposes, a program could not take advantage of the 16-megabyte address space without using protected mode. Unfortunately, protected mode could not run real-mode (DOS) programs. These limitations thwarted attempts to adopt the 80286 programming extensions for mainstream consumer use.
IBM was spurred by the huge success of the IBM PC and decided to use the 80286 in their next generation computer, the IBM PC-AT. However, the PC-AT was not introduced until 1985 -- three years after introduction of the 80286.
During the reign of the 80286, the first "chipsets" were introduced. The computer chipset was nothing more than a set of chips that replaced dozens of other peripheral chips, while maintaining identical functionality. Chips and Technologies became one of the first popular chipset companies.
Like the IBM PC, the PC-AT was hugely successful for home and business use. Intel continued to second-source the chips to ensure an adequate supply of chips to the computer industry. Intel, AMD, IBM, and Harris were known to produce 80286 chips as OEM products; while Siemens, Fujitsu, and Kruger either cloned it, or were also second-sources. Between these various manufacturers, the 80286 was offered in speeds ranging from 6 MHz to 25 MHz.
各位大大 如果對圖示有興趣，請參考『1977 她的眼睛像月亮』http://www.youtube.com/watch?v=YgCiXDLIj6Q
wst2080 wrote:
印象中...在於486時代的時候...
PS:我住在鄉下...搞PC邁入14年了吧...哈哈...
當時的RAM 1 MB... 水貨還要一萬多塊錢...
當時第一台電腦... Harris 286 16Mhz + 1MB + Seagate 20 MB MFM HD + TEAC 5.25" Floppy .... 當時的OS...DOS 3.3(印象中) + ET (PS:ET2那時還沒出,更何況ET3?!)
呵呵...花了粉多$$....才知道...敗家的可怕....
1983 年
郭氏兄弟（樓起樓垮的那兩位）很興奮的跟我說：
TEAC 5.25" Floppy （單面64kB）由兩萬降價到一萬一
可以馬上從一千元的大同錄音機升級到 Floppy....
為了節省時間
我就敗下去了
各位大大 如果對圖示有興趣，請參考『1977 她的眼睛像月亮』http://www.youtube.com/watch?v=YgCiXDLIj6Q
tm84008 wrote:
不曉得有沒有人有PE...(恕刪)
我有喔.. http://www.mynikko.com/CPU/Pentium.html
不過所有圖放上來可能會爆掉...
http://www.mynikko.com/CPU (MyNikko.com 英特爾中央處理器博物館)
！目前看MPEG4電影會有些頓頓，但是開網頁、文書處理、當然還有跑動物，比原先用P3-500還要快了…
..我這也保留不少的 cpu 其中還有年代久遠的CPU
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