---
title: "3 Port I/O board"
id: 11586
type: "product"
slug: "3-port-i-o-board"
url: "http://localhost/product/3-port-i-o-board/"
markdown_url: "http://localhost/product/3-port-i-o-board.md"
published_at: "2019-11-30T01:14:04+00:00"
modified_at: "2026-03-22T13:22:59+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Programmable 8255 PIA. Space for analog-to-digital converter, relays, clock chip, etc. Expansion connector for RAM pack."
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  - name: "Interfacing"
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    taxonomy: "genre"
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company:
  id: 11191
  title: "Professional Electronics"
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  url: "http://localhost/company/professional-electronics/"
price: 50
date: 1982
rarity: "Uncommon"
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      title: "Extending Your Computer"
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      title: "Resources (Sync v2 n1)"
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        title: "SYNC v2 n1"
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companies_products:
  - id: 11191
    title: "Professional Electronics"
    type: "company"
    url: "http://localhost/company/professional-electronics/"
---

# 3 Port I/O board

Programmable 8255 PIA. Space for analog-to-digital converter, relays, clock chip, etc. Expansion connector for RAM pack.