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DEC Alpha

DEC Alpha 

It was another company which brought 64-bit processor named Alpha in the year 1991.This processor is based on Reduced Instruction Set Computer (RISC) architecture. DEC built this against DEC's 32-bit Complex Instruction Set Computer (CISC) VAX. DEC Alpha processors powered a range of workstations and servers, including the DEC 3000 AXP, AlphaStation, and AlphaServer.DEC also used Alpha processors in high-end systems like the Cray Research's Cray T3D supercomputer.Cray Research utilized the Alpha 21064 processor in its Cray T3D supercomputer. So it showed a trend to include Alpha microprocessors in mid-to-upper-scale lineup.

EV-4 was the first Alpha CPU which had 200Mhz of operating frequency or the clock cycle, with integer and floating point units 8KB I and 8KB D cache and had 1.7 million transistors.

Operating systems compatible with Alpha were OpenVMS, True64 UNIX, Linux, Unix and using a 32-bit emulation layer Windows NT was also used and was stopped after WinNT 4,0 SP6 and Windows 2000 RC1.



By Appaloosa - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=5187545






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