---
title: "ZX81 I/O Map"
type: "article"
slug: "zx81-i-o-map"
url: "http://localhost/article/zx81-i-o-map/"
markdown_url: "http://localhost/article/zx81-i-o-map.md"
published_at: "2021-03-27T16:33:41+00:00"
modified_at: "2024-05-26T13:41:53+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Details about using IN and OUT on the ZX81."
category:
  - name: "ZX-Appeal"
    slug: "zx-appeal"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/zx-appeal/"
post_tag:
  - name: "Reference"
    slug: "reference"
    taxonomy: "post_tag"
    url: "http://localhost/tag/reference/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "John Isaacson"
    slug: "john-isaacson"
    taxonomy: "indiv"
    url: "http://localhost/indiv/john-isaacson/"
publication: "ZX-Appeal"
publication_r:
  id: 36087
  title: "ZX-Appeal"
  type: "periodical"
  url: "http://localhost/periodical/zx-appeal/"
authors: "John Isaacson"
issues_articles:
  - id: 36104
    title: "ZX-Appeal October 1985"
    type: "issue"
    url: "http://localhost/issue/zx-appeal-october-1985/"
pages: "3"
pubdate: "October 1985"
archive_link: false
volumeissue: "vn"
---

# ZX81 I/O Map

Details about using IN and OUT on the ZX81.