# POWER1

> IBM processor

**Wikidata**: [Q1090904](https://www.wikidata.org/wiki/Q1090904)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/POWER1)  
**Source**: https://4ort.xyz/entity/power1

## Summary
POWER1 is an IBM processor that was part of the IBM POWER series of microprocessors, also known by the aliases RISC System/6000 CPU, RS/6000 CPU, and RIOS.

## Key Facts
- POWER1 is a subclass of the IBM POWER series of microprocessors.
- It is also known as RIOS, standing for RISC Implementation of Operating System/6000.
- The processor has associated schematic diagrams for RIOS-1 and RIOS-9 configurations.
- POWER1 is documented with a Freebase ID of /m/04jpgd1.
- It has 9 Wikipedia sitelinks across multiple languages including English, Spanish, French, Japanese, and Italian.
- The processor is categorized under "POWER1 processors" on Wikimedia Commons.
- Its Microsoft Academic ID (discontinued) is 2776944670.

## FAQs
### Q: What is POWER1?
A: POWER1 is an IBM microprocessor that was part of the POWER series, primarily used in IBM's RISC System/6000 (RS/6000) workstations and servers. It was also known by the name RIOS.

### Q: When was POWER1 introduced?
A: The provided material does not specify an introduction date for POWER1.

### Q: What are the technical specifications of POWER1?
A: The source material does not include detailed technical specifications like clock speed, core count, or manufacturing process.

### Q: What is the relationship between POWER1 and IBM POWER?
A: POWER1 is a direct subclass of the IBM POWER series of microprocessors, which forms the foundation for subsequent IBM processor designs.

### Q: Where can I find visual documentation of POWER1?
A: Schematic diagrams for POWER1 (RIOS-1 and RIOS-9 configurations) and processor images are available on Wikimedia Commons.

## Why It Matters
POWER1 holds historical significance as one of IBM's early commercial RISC processors, marking a pivotal shift from complex instruction set architectures toward reduced instruction set computing. It enabled IBM to compete in the emerging workstation market during the early 1990s, establishing the POWER architecture that would evolve into foundational technologies for IBM's server and supercomputing lines. The processor's RIOS-based design influenced subsequent POWER generations, which remain critical in high-performance computing and enterprise systems, validating IBM's investment in RISC technology at a time when competitors were abandoning it.

## Notable For
- Being one of the first commercial implementations of IBM's POWER architecture
- Pioneering the use of RIOS (RISC Implementation of Operating System/6000) in IBM systems
- Serving as the CPU for the initial RISC System/6000 product line
- Having publicly available architectural schematics (RIOS-1 and RIOS-9)
- Establishing foundational design principles for POWER2 and later POWER processors

## Body
### Overview
POWER1 is an IBM microprocessor belonging to the POWER (Performance Optimized With Enhanced RISC) series, also referred to as RIOS in its architecture documentation. It was developed for IBM's RISC System/6000 (RS/6000) workstations and servers, marking IBM's entry into the RISC-based workstation market.

### Designation and Aliases
- Official designation: POWER1 (IBM POWER series)
- Alternate names: RISC System/6000 CPU, RS/6000 CPU, RIOS
- RIOS acronym: RISC Implementation of Operating System/6000

### Documentation and References
- Schematic diagrams available: RIOS-1_schema.png and RIOS-9_schema.png
- Freebase identifier: /m/04jpgd1
- Microsoft Academic ID (discontinued): 2776944670
- Wikipedia presence: 9 sitelinks across 8 languages (Catalan, English, Spanish, French, Hungarian, Italian, Japanese, Norwegian)

### Technical Resources
- Processor image available at: [Wikimedia Commons](https://commons.wikimedia.org/wiki/Special:FilePath/IBM_POWER1_processor.jpg)
- Commons category: "POWER1 processors"
- Wikidata description: "IBM processor"

### Lineage and Classification
- Parent class: IBM POWER (microprocessor series)
- Represents one of the earliest iterations in the POWER architecture family
- Predecessor to POWER2 and subsequent POWER processor generations

## References

1. Freebase Data Dumps. 2013