# DEC Alpha

> 64-bit RISC microprocessor

**Wikidata**: [Q858065](https://www.wikidata.org/wiki/Q858065)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/DEC_Alpha)  
**Source**: https://4ort.xyz/entity/dec-alpha

## Summary
The DEC Alpha is a 64-bit RISC microprocessor designed by Digital Equipment Corporation (DEC) and introduced in 1992. It was part of DEC's Alpha AXP architecture and served as a successor to earlier DEC processors, including the VAX. The Alpha was notable for its performance, scalability, and use in high-end computing systems like the AlphaServer and AlphaStation.

## Key Facts
- **Type**: 64-bit RISC microprocessor
- **Designed by**: Digital Equipment Corporation (DEC)
- **Inception**: 1992
- **Endianness**: Big-endian
- **Subclass of**: Central processing unit (CPU)
- **Used in**: AlphaServer and AlphaStation systems
- **Aliases**: Alpha processor, Alpha AXP, AXP, DEC Alpha, DEC/Compaq Alpha
- **Notable applications**: ASCI Q supercomputer (2002)
- **Instance of**: Instruction set architecture, computing platform, CPU model
- **Logo**: [DEC Alpha Generation logo](https://commons.wikimedia.org/wiki/Special:FilePath/DEC_Alpha_Generation_logo.svg)

## FAQs
### Q: What company developed the DEC Alpha?
A: The DEC Alpha was developed by Digital Equipment Corporation (DEC), a leading computer manufacturer in the 1990s.

### Q: What systems used the DEC Alpha?
A: The DEC Alpha was used in systems like the AlphaServer and AlphaStation, which were successors to DEC's VAX line.

### Q: What is the DEC Alpha's endianness?
A: The DEC Alpha uses big-endian architecture, meaning it stores the most significant byte of a word at the smallest memory address.

### Q: What was the first major system to use the DEC Alpha?
A: The ASCI Q supercomputer, released in 2002, was one of the first major systems to utilize the DEC Alpha processor.

### Q: What was the DEC Alpha's role in high-performance computing?
A: The DEC Alpha was used in high-performance computing systems, including supercomputers like the ASCI Q, due to its 64-bit architecture and scalability.

## Why It Matters
The DEC Alpha was a significant advancement in microprocessor design, introducing 64-bit computing to the mainstream. It played a crucial role in high-performance computing, particularly in supercomputers like the ASCI Q, which relied on its scalability and performance. The Alpha AXP architecture also influenced later RISC designs and was used in systems that preceded modern x86-based architectures. Its big-endian design and focus on performance made it a key component in DEC's transition from the VAX to more advanced computing platforms. The DEC Alpha's legacy continues to be studied in the context of early 64-bit computing and its impact on the evolution of processors.

## Notable For
- **64-bit Architecture**: One of the first widely adopted 64-bit microprocessors, paving the way for modern computing.
- **High-Performance Computing**: Used in supercomputers like the ASCI Q, demonstrating its scalability.
- **Big-Endian Design**: A unique architectural choice that influenced later processor designs.
- **Successor to VAX**: Bridged DEC's legacy VAX systems to modern computing platforms.
- **DEC's Transition**: Played a key role in DEC's shift from minicomputers to high-performance computing.

## Body
### Overview
The DEC Alpha, officially known as the Alpha AXP, is a 64-bit reduced instruction set computing (RISC) microprocessor developed by Digital Equipment Corporation (DEC). Introduced in 1992, it was part of DEC's strategy to transition from its VAX minicomputer line to a new architecture that could support high-performance computing. The Alpha AXP architecture was designed to be scalable, allowing for both high-end and low-end implementations.

### Technical Specifications
The DEC Alpha was a big-endian processor, meaning it stored the most significant byte of a word at the smallest memory address. This design choice was notable at the time, as most contemporary processors used little-endian architecture. The Alpha AXP architecture included features such as a large register set, hardware support for floating-point operations, and a unified memory model.

### Applications and Systems
The DEC Alpha was used in various systems, including the AlphaServer and AlphaStation. The AlphaServer was a high-end server designed for enterprise and scientific computing, while the AlphaStation was a workstation successor to the VAX. One of the most notable systems to use the DEC Alpha was the ASCI Q supercomputer, released in 2002. The ASCI Q was a high-performance computing system used for research and scientific applications.

### Legacy and Influence
The DEC Alpha's legacy includes its role in the transition from 32-bit to 64-bit computing. While it was eventually succeeded by the x86 architecture, the Alpha AXP architecture influenced later RISC designs. The DEC Alpha's focus on performance and scalability made it a key component in high-performance computing, particularly in supercomputers. Its big-endian design and advanced features set it apart from contemporary processors, contributing to its significance in the history of computing.

### References and Identifiers
The DEC Alpha is referenced in various databases and identifiers, including:
- **Wikidata**: [DEC Alpha](https://www.wikidata.org/wiki/Q106509962)
- **Wikipedia**: [DEC Alpha](https://en.wikipedia.org/wiki/DEC_Alpha)
- **Library of Congress**: [sh93009148](https://lccn.loc.gov/sh93009148)
- **National Library of Israel**: [987007551410005171](https://nli.org.il/en/catalog/NLI987007551410005171)

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  "@type": "Thing",
  "name": "DEC Alpha",
  "description": "64-bit RISC microprocessor designed by Digital Equipment Corporation in 1992",
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  "sameAs": [
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## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. Freebase Data Dumps. 2013
3. Quora
4. National Library of Israel Names and Subjects Authority File