Computer Architecture :: Essays Papers

Computer Architecture 1. There have been a lot of developments in microprocessors since the 286 chip. The 286 CPU are no longer exchange and are very rarely found in commercial rehearse today because of its running speed, which is amongst 10MHz to 20MHz. This processor has a 24-bit address bus, and is able to address up to 16 million different address locations. It similarly has two operating modes, which are authentic mode and protected mode. The real mode is basically for normal DOS operations and it uses only 8086 formula (8086 was the previous CPU). When it was in protected mode the CPU is able to chafe beyond the 1mb address limit and employed its added features, which were intended for multi-tasking operations much(prenominal) as Windows, but this CPU is not powerful enough to load down out these multi-tasking operations. The 286 came with a bus width of 16-bit interior(a), 24-bit address, and 16-bit foreign, with an outdoor(a) speed of mingled with 6MHz 25MHz, and an internal speed of in the midst of 6MHz 25MHz. The next CPU was the 386, this is also no longer produced it had a slightly faster running speeds which are between 16MHz to 40MHz. This CPU could carry out effective multi tasking operations. It also had a self-colored improvement in both memory management and it had an enlarged teaching method set. It is also the minimum CPU for running windows. It came in two types the 386 SX and the 386 DX. The SX had a 32-bit internal info bridle-path but it only had a 16-bit path between the CPU and the computer memory. The DX on the other hand had a 32-bit data bus between the CPU and the memory chips allowing larger data transfers so it had faster through put. It also was able to use external cache memory, usually about 64k, which also improved performance. The 386 came in two different types they both had a internal bus width of 32 bit, the SX had a address bus width of 24 bit, and a external bus width of 16 bit, its internal and ex ternal speed was between 16MHz 33MHz. The DX however had an address and external bus width of 32 bit, its internal and external speed was between 33MHz40MHz.The 486 were the next CPU, this is still produced, there was picayune change to the 386 instruction set, but the 486 ran at speeds between 20MHz to 100MHz.