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The Generations period of the first PC can be divided based on the household type of CPU processor used in computers.
Here are the lines the basic family of these CPU
1) The original of his grandfather - "8088"
The 8088 is slow slow slow. Currently (1981) seemed as a very hot object.
The 8088 is an Intel microprocessor based on Intel 8086, with records for 16-bit and one 8-bit external data bus.
The most influential microcomputer using the 8088 was by far, the IBM PC. The original PC processor ran at a clock frequency of 4.77 MHz A popular clone using a 8088 was the Leading Edge Model D, with a switch to select running at 4.77 MHz or 7.16 MHz
2) 802286
The 286 is the next generation of vintage computers in 1980 for half the time. A computer in the family 286 is about three to four times faster than a 8088-based PC.
The biggest problem 286 is a chip that does not handle the memory and a 386 (next step in the line) computer. It has a different set of instructions (programming a chip telling you what to do), which is just slightly incompatible with the 386th
These differences, low speed, which made the 286 almost incompatible with the newer software sealed important updates on your computer.
We owe much to our day Pentium 4s to the early days of 386 computers.
Compared to a 286, the 386 has had an enormous amount addressable memory. The 386 came in two basic flavors - SX and DX - and in a whole range of speeds. The 386 SX is a bridge between 16-bit and 32 bit chip.
Higher clock speeds certainly boosted performance, but the most obvious change was the move from 16 bit to 32 bit computing. When you have verified that the performance was doubled immediately, since twice as much data could be transferred and used. E 'as two times bigger than grabbing a handful. The most the big fist grasped the most that can be moved at a time. Today this seems trivial but when it was more of an important step in our current 32-bit and now computers to 64 bit (plus a step that should be grateful for the 386 for the leader of us).
80486
The 486 was a more humble affiancing the 386th It 'an integrated system in 8 kb cache and cache controller (kb as opposed to megabytes, which is 1000 kb). And a math coprocessor, and a better architecture memory management 32-bit operations were part of the package. The cache gave a boost to overall performance, while using relatively inexpensive memory dynamics random access (DRAM), DRAM is a volatile type of main memory,
Cache is a simple way to speed up the computer 486. A cache the next instructions provided on the basis of what had been done and stored in a cache in memory. Then, when the instructions or data was needed was recovered fairly quickly from cache memory.
A 486 could process 32-bit instructions much faster than any 386. However DOS software as was written primarily for 8 and 16-bit systems can not benefit from these advances.
OS / 2 multitasking operating system developed by Microsoft and Windows 3.0 3.1 and later versions are able to take full advantage of the 486 functions.
80486DX2
The 486DX2 was a strange chip that has twice internally faster outside the system. In other words, if a machine is designed to operate at 25 MHz 486, you could put in 50 MHz 486DX2 and that work well, without major changes for the rest of the computer. It does not run as fast as a 50 MHZ 486DX though. Only the bowels of the CPU is running faster on a DX2 chip - the rest of the computer is running at the speed designated about 25 MHz chip. This is a bit 'confusing, but suffice to say that a 50 MHZ 486DX has several benefits of a 50 MHZ 486DX2. Perhaps this was but little more than a trick of marketing of Intel.
804486SX
Either 486SX was slowed 486th
Yes ran a 16, 20 and 25 Mhz.
Basically in a 486SX math coprocessor or the chip has been disabled.
O 486SX The budget was an entry level chip designed to users to upgrade their 386 to lower costs. Or he might have been seen as the door to get 2 cars in the auto showroom or steer away from competitors.
Finally, the 80486DX3
These IBM chips that were authorized were tripled clock 486 chips running at 75 MHz and 99 MHz (conveniently called the speed of 100 MHz)
Versions of Intel have been called the DX4
It is not necessary to say that these chips are by far overshadowed by the subsequent Pentium processors of the same or greater speed.
In general, the speed of the CPU of the computer goes to the family of speed. This is a 75 MHz (later model) Pentium almost certainly beat a 100 MHZ CPU 486.
