This version never materialized. The displacement field contains a signed integer and if the value of the integer is positive, if the branch is taken then the program counter is incremented. The EV67 was the first Alpha microprocessor to implement the count extension CIX , which extended the instruction set with instructions for performing population count. The Alpha was designed as bit from the start and there is no bit version. The load store units are simple arithmetic logic units used to calculate virtual addresses for memory access.

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Microprocessors of Digital Equipment Corporation. The integer arithmetic instructions perform addition, multiplication, and subtraction on longwords and quadwords; and comparison on quadwords.

Alpha: The History in Facts and Comments – Alpha (EV6, EV67, EV68A, EV68C)

Firstly, Digital had determined that the Alpha was already capable of performing DVD decoding through software, therefore not requiring hardware provisions for the purpose, but was inefficient in MPEG-2 encoding. Alpha consistently topped the benchmarks throughout the s.

Both caches have a capacity of 64 KB. Retrieved Nov 22, This number of registers was deemed not to be a major issue dec alpha ev6 respect to performance and future growth, as thirty-two registers xec dec alpha ev6 at least eight-way instruction issue. Wikimedia Commons has media related to DEC.

DEC Alpha – Wikipedia

At the time of its announcement, Alpha was heralded as an architecture for the next 25 years. It was fabricated by IBM in a 0.


The architectural differences began with the elimination of the MQ register, since it would add complexity to possible superscalar versions. Logical and shift instructions use the integer operate instruction formats. The M-series “Military” design predated the released i which removed tag bits and dec alpha ev6 instruction microcode dec alpha ev6, but was released later.

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DEC Alpha EV6 – 500 MHz

dce Integer registers are duplicated, with two independent pipelines, to simplify register access, similarly to the Sun MAJC functional units, except that instructions are grouped by the dispatching logic into two streams. There are two dec alpha ev6 instructions, and they differ only in the hints provided for the branch prediction hardware.

Retrieved from ” https: Those 2 register files were identical syncronised though. The EV67 was the first Alpha microprocessor to implement the count extension CIXdec alpha ev6 extended the instruction set with instructions for performing population allpha. SPARC also has a specification for similar barrier instructions. From Dec alpha ev6, the free encyclopedia.

This was the first Alpha system to support Windows NT. Alpha bit operations differ from 64 bit only in overflow detection. Apparently, these processors were installed in Compaq servers only. alha


This version never materialized. Dec alpha ev6 the cache restricted the capacity of the cache, as it required more transistors dec alpha ev6 provide the same amount of capacity, and in turn increased the area required and power consumed. The chipset consisted of three devices, a C-chip, a D-chip and a Dv6.


These microprocessors were most prominently used in a variety of DEC workstations and servers, which eventually formed the basis for almost all of their mid-to-upper-scale lineup.

The and processors were used by NetApp in various network-attached storage systems, while the and processors dec alpha ev6 used by Cray in their T3D and T3E massively parallel supercomputers. The Epoch of Compaq. Unsourced material may be challenged and removed. But note that Compaq expects to manufacture and ship Alpha chips intobefore converting over to IA In addition, the more complex string operations and three-source instructions were dec alpha ev6, and finally, 32 bit floating point support was added.

Articles needing additional references from October All articles needing additional references All articles with unsourced statements Articles with unsourced statements from March Articles with unsourced statements from May Articles with unsourced statements from April Digital concluded that 32 registers was more suitable as it required less die space, sv6 improved clock frequencies.

Was produced by Samsung using a 0. It defined the Motorola as the standard PowerPC bus.