為什么CPU叫8085呢？

8085這個名字的由來還是很有邏輯的：The naming of microprocessor indicates historical facts blended with technology improvements.1)The microprocessor came in the late 70s(1976).This was close to 80.so from here 1ST TWO DIGITS were taken. ?微處理器是在70年代末發明的。 接近80年，所以，前兩個數字就是這么來的? 2)There are 8 bits in microprocessor.Hence the 3RD DIGIT was tkaen as 8. ?當時微處理器是8位的，因此，第3個數字是8? 3)Before 8085,8086 the CPU of intel corporation was 8080A which were requiring +5V,-5V and +12V for functioning. With the advancement in technology, it was possible to run the microprocessor with single +5V.Hence the LAST DIGIT were taken as 5. 在8085和8086 cpu之前，8080a處理器是需要+5-5和12v電壓來工作。 隨著技術的進步，只需要單一的5v供電了，因此，最后一個數字是5 This was the hidden message behind 8085,(year)(bits)(supply voltage)80 8 58086的命名跟8085不大一樣，名字的命名方式有點隨性，貌似沒有什么邏輯： When Intel made the first 4 bit microprocessor, it was called the 4004. At the time, they did not realize it was a microprocessor, they were just making a custom integrated circuit for a handheld electronic calculator. 當intel發明第一顆4位的位處理器的時候，intel把他叫4004.在當時，intel也沒有意識到這就是微處理器，（估計微處理器是現在人啟名字），intel當時只是給做手持計算器的廠家來定制處理器。 The instruction set on the 4004 was quite limited; an upgraded version was numbered 4040 by reversing the last two digits. By now, they realized the power of a programmable microprocessor. When they made 8 bit processors, the double wide 4004 was the 8008, and the double wide 4040 was the 8080. The 8085 was the 5 volt only version of the 8080. 因為4004的指令集很有限，所以又搞出來了一個升級版本4040. 8008是4004的8位版，8080是4040的8位版。 8085是8080的單5伏電壓版 When Intel made an upgraded 8085 into a 16 bit processor, the next number was 8086. They liked this, as it seemed to fit the 16 bit nature. The 8088 was an 8086 with an 8 bit data bus for fewer pins on the package, and I think the 8087 was a math coprocessor (things are starting to get fuzzy, this was quite a few years ago). Note that there is no law requiring any particular numbering scheme, it is not unusual to skip numbers or make up new numbers that seem to have some kind of meaning. 8085升級到16位后，就叫8086了 Later they went with a new generation 80186, then 80286, then 80386 and I think, 80486. They dropped the "80" in front somewhere along the way, it was common to call a microprocessor a 386SX or 486. Then, they pretty much dumped the numbers entirely, because other companies were using them. Making up names like Pentium for the 586 means they could trademark them and prevent others from using them.

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