IA-32 - sometimes generically called x86-32 - set of instructions the Intel 32-bit microprocessor family; previous architecture 16-bit microprocessors. Was introduced in the third generation of Intel processors and 80386SX DX in 1985. Indeed, the 386SX is only 32-bit processor on the inside, because the link with the outside world via 16-bit data bus. This means that the data are moved between the SX processor and the rest of the system at half the speed of the 386DX.
The fourth generation of 32-bit processors. However, they all offer a number of improvements. First, the whole project has been reviewed by a range of Intel 486, which does more than twice as fast. Secondly, all the 8K cache on the chip itself, the right of the processor logic. This transfer of data stored in main memory, which means that, on average, the processor must wait for data from the motherboard to only 4% of the time because it is generally able to obtain information it needs from the cache.
The 486DX model 486SX different from what has led to the mathematical co-processor board also. This processor is designed to take over the floating-point calculations. It had little impact on applications for everyday life, but the transformation efficiency of spreadsheets, statistical analysis, CAD and so on.
An important innovation introduced in the lesson on double 486DX2. This means that the circuits on the chip run at twice the speed of the outer electron. Data is transferred between the processor, internal cache and math coprocessor at twice the speed, improve performance significantly. The 486DX4 took this technique to more than triple the time internal Started in 75 or 100MHz, and has doubled the amount of cache level 1 to 16 K.
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