中国聚U网-CPU收藏讨论 (CPU Discussion)-小型机的CPU

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标题：小型机的CPU	树形打印收藏推荐

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小型机的CPU

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2006-07-24 15:41

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Model Model number Year Frequency [MHz] Process [&micro;m] Transistors [millions] Die size [mm&sup2;] IO Pins Power [W] Voltage Mem [MB/s] Dcache [KB] Icache [KB] Scache Bcache ISA EV5 21164 1995 266–500 0.5 9.7 299 296 56 3.3/2.5 150 8 8 96 KB 1 R EV56 21164A 1996 400–767 0.35 9.3 209 46 3.3/2.0 300 8 8 96 KB 1–2 MB R,B PCA56 21164PC 1997 400–533 0.35 3.5 141 264 40 3.3/2.5 8 16 -- 1 MB R,B,M The Alpha 21164 or EV5 became available in 1995 at processor frequencies of up to 333 MHz. In July 1996 the line was speed bumped to 500 MHz, in March 1998 to 666 MHz. Also in 1998 the 21264 (EV6) was released at 450 MHz, eventually reaching (in 2001 with the 21264C/EV68CB) 1.25 GHz. In 2003, the EV7 Marvel was launched, essentially an EV68 core with four 1.6 Gbyte/s inter-processor communication links for improved multiprocessor system performance, running at 1 or 1.15 GHz. Around 500,000 Alpha based systems were sold by the end of 2000. ------------------------------------------ Officially, the Alpha processors were designated the DECchip 21x64 series, the "21" signifying the 21st century, and the "64" indicating 64 bits, with the middle digit corresponding to the generation of the Alpha architecture. Internally, Alpha processors were also identified by EV numbers, EV officially standing for "Extended VAX" but having an alternative humorous meaning of "Electric Vlasic"[1]. The first few generations of the Alpha chips were some of the most innovative of their time. The first version, 21064 or EV4, was the first CMOS microprocessor whose operating frequency rivalled higher-powered ECL minicomputers and mainframes. The second, 21164 or EV5, was the first microprocessor to place a large secondary cache on chip. The third, 21264 or EV6, was the first microprocessor to combine both high operating frequency and the more complicated out-of-order execution microarchitecture. The unproduced EV8 would have been the first to include simultaneous multithreading, but this version was caught up in the sale to Compaq. A persistent report attributed to DEC insiders suggests the choice of the AXP tag for the processor was made by DEC's legal department, which was still smarting from the VAX trademark fiasco. After a lengthy search the tag "AXP" was found to be entirely unencumbered. Within the computer industry, a joke got started that the acronym AXP meant "Almost Exactly PRISM".</TH> [align=right][color=#000066][此贴子已经被作者于2006-11-24 23:51:16编辑过][/color][/align]

2006-11-24 23:46