What is the WDC 65C21?

The WDC 65C21 is a Peripheral Interface Adapter, a type of microprocessor contained on an integrated-circuit chip. It is classified as a subclass of microprocessor and was used in early computing systems to interface with peripheral devices.

What is the WDC 65C21 used for?

The WDC 65C21 is primarily used as a Peripheral Interface Adapter, facilitating communication between a computer's central processing unit and external devices such as printers, modems, and storage systems.

Where can I find more information about the WDC 65C21?

More information about the WDC 65C21 can be found on its Wikipedia page, which is titled "WDC 65C21" in English. Additionally, an image of the device is available on Wikimedia Commons.

What is the significance of the WDC 65C21 in computing history?

The WDC 65C21 played a role in early computing systems by serving as a Peripheral Interface Adapter, enabling the connection and communication of peripheral devices with the central processing unit.

WDC 65C21

Peripheral Interface Adapter

class practices Q7948330

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Summary

WDC 65C21 draws 19 Wikipedia views per month (practices category, ranking #216 of 764).^[1]

Key Facts

Subclass of: microprocessor^[2]

⭐ Popularity Graph

9/100 long tail

🌐 Wiki Languages

1 / 428 langs

📈 Wikipedia Views · last 2h

21/mo 149/yr

Quick Facts

Subclass of microprocessor

External References (1)

Freebase id /m/0bbl_x

🏷️ Also known as

en WDC 65C21

🔗 Connections

Subclass of 1

microprocessor

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

[2] ↑ WDC 65C21 — subclass of (P279): microprocessor. wikidata.org.

Aggregate / graph-position facts

[1] ↑ WDC 65C21 draws 19 Wikipedia views per month (practices category, ranking #216 of 764).. Wikimedia Foundation. dumps.wikimedia.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). WDC 65C21. Retrieved October 26, 2026, from https://4ort.xyz/entity/wdc-65c21

MLA “WDC 65C21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 26 Oct. 2026, https://4ort.xyz/entity/wdc-65c21.

BibTeX

@misc{4ortxyz_wdc-65c21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{WDC 65C21}}, year = {2026}, url = {https://4ort.xyz/entity/wdc-65c21}, note = {Accessed: 2026-10-26}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): WDC 65C21 — https://4ort.xyz/entity/wdc-65c21 (retrieved 2026-10-26)

Canonical URL: https://4ort.xyz/entity/wdc-65c21 · Last refreshed: October 26, 2026

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

11d ago · MsynBot bot · 2026-10-17 view diff on Wikidata ↗

Subclass of → microprocessor

Subclass of → —

Freebase id → /m/0bbl_x

Freebase id → —

+ 3 other properties edited (see Wikidata diff for full list)

"/* wbeditentity-update:0| */ add badge sitelink to redirect to enwiki sitelink; see [[Wikidata:Sitelinks to redirects]] for details #msynbotTask10"

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