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== Overview == | == Overview == | ||
− | Throughout the mid-80s [[DEC]] saw the rise of a number of [[RISC]] architectures such as [[MIPS]] and [[SPARC]] which they considered serious competition that will ultimately defeat | + | Throughout the mid-80s [[DEC]] saw the rise of a number of [[RISC]] architectures such as [[MIPS]] and [[SPARC]] which they considered serious competition that will ultimately defeat DEC's best attempts to improve [[VAX]]. After close to half a dozen resource projects, in the late 1980s DEC finally established an engineering team tasked with the job of creating a high-performance architecture that would be able to compete with those architectures all while providing an easy as possible migration path for existing VAX users and MIPS users. Their result was the [[DEC Alpha]], an entirely new {{arch|64}} architecture that would have at least a 25-year future by eliminating many architectural restrictions they thought would prevent them from improving in the future. |
Introduced in late 1992, Alpha was a family of microprocessors designed for high-end desktops, workstations, and servers. At their introduction, those chips were the world's fastest, though their competitiveness dropped at later iterations (though some attributed this to Alpha's acquisition by Compaq in [[1998]]). Alpha CPUs have gone through a handful of microarchitectures, each improving performance and capabilities. | Introduced in late 1992, Alpha was a family of microprocessors designed for high-end desktops, workstations, and servers. At their introduction, those chips were the world's fastest, though their competitiveness dropped at later iterations (though some attributed this to Alpha's acquisition by Compaq in [[1998]]). Alpha CPUs have gone through a handful of microarchitectures, each improving performance and capabilities. |
Facts about "Alpha - DEC"
designer | DEC +, Compaq + and HP + |
first announced | February 1992 + |
first launched | November 20, 1992 + |
full page name | dec/alpha + |
instance of | microprocessor family + |
instruction set architecture | Alpha + |
main designer | DEC + |
manufacturer | DEC +, Samsung +, Intel + and IBM + |
microarchitecture | 21064 +, 21164 +, 21264 + and 21364 + |
name | Alpha + |
package | PGA-431 +, PGA-499 +, PGA-587 + and PGA-1443 + |
process | 750 nm (0.75 μm, 7.5e-4 mm) +, 675 nm (0.675 μm, 6.75e-4 mm) +, 500 nm (0.5 μm, 5.0e-4 mm) +, 350 nm (0.35 μm, 3.5e-4 mm) +, 250 nm (0.25 μm, 2.5e-4 mm) +, 180 nm (0.18 μm, 1.8e-4 mm) + and 130 nm (0.13 μm, 1.3e-4 mm) + |
technology | CMOS + |
word size | 64 bit (8 octets, 16 nibbles) + |