---
title: "Two Switch Human Interface for the Communicative Impaired"
type: "article"
slug: "two-switch-human-interface-for-the-communicative-impaired"
url: "http://localhost/article/two-switch-human-interface-for-the-communicative-impaired/"
markdown_url: "http://localhost/article/two-switch-human-interface-for-the-communicative-impaired.md"
published_at: "2020-10-27T17:18:50+00:00"
modified_at: "2024-06-23T01:05:00+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "The program will usually display three rows of characters on the screen at any lime: the upper alphabet (UA) row, the lower alphabet (LA) row, and the message row. which will be empty at first. The program allows the user to select letters from the alphabet rows for display in the message row."
category:
  - name: "SYNC"
    slug: "sync"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/sync/"
post_tag:
  - name: "1982"
    slug: "year-1982"
    taxonomy: "post_tag"
    url: "http://localhost/tag/year-1982/"
  - name: "Hardware project"
    slug: "hardware-project"
    taxonomy: "post_tag"
    url: "http://localhost/tag/hardware-project/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "ZX80"
    slug: "zx80"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx80/"
  - name: "ZX81"
    slug: "zx81"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx81/"
model:
  - name: "Sinclair ZX80"
    slug: "zx80"
    taxonomy: "model"
    url: "http://localhost/model/zx80/"
  - name: "Sinclair ZX81"
    slug: "zx81"
    taxonomy: "model"
    url: "http://localhost/model/zx81/"
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Charles Dorcey"
    slug: "charles-dorcey"
    taxonomy: "indiv"
    url: "http://localhost/indiv/charles-dorcey/"
publication: "Sync"
publication_r:
  id: 10243
  title: "SYNC"
  type: "periodical"
  url: "http://localhost/periodical/sync-magazine/"
authors: "Charles Dorcey"
volume: "2"
issue: "3"
issues_articles:
  - id: 26643
    title: "SYNC v2 n3"
    type: "issue"
    url: "http://localhost/issue/sync-v2-n3/"
pages: "23, 26-27"
pubdate: "May/June 1982"
archive_link: false
volumeissue: "v2n3"
---

# Two Switch Human Interface for the Communicative Impaired

The program will usually display three rows of characters on the screen at any lime: the upper alphabet (UA) row, the lower alphabet (LA) row, and the message row. which will be empty at first. The program allows the user to select letters from the alphabet rows for display in the message row.