---
title: "Four-digit Multiplexed BCD to ZX81 Adaptor"
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slug: "four-digit-multiplexed-bcd-to-zx81-adaptor"
url: "http://localhost/article/four-digit-multiplexed-bcd-to-zx81-adaptor/"
markdown_url: "http://localhost/article/four-digit-multiplexed-bcd-to-zx81-adaptor.md"
published_at: "2020-10-27T17:17:57+00:00"
modified_at: "2024-06-23T07:50:27+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Interface binary-coded decimal (BCD) devices to the ZX81."
category:
  - name: "Electronics Today International"
    slug: "electronics-today-international"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/electronics-today-international/"
post_tag:
  - name: "1983"
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  - name: "Hardware project"
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  - name: "ZX81"
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model:
  - name: "Sinclair ZX81"
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indiv:
  - name: "W. K. Todd"
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publication: "Electronics Today International"
publication_r:
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  title: "Electronics Today International"
  type: "periodical"
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authors: "W. K. Todd"
volume: "7"
issue: "10"
pages: "28"
pubdate: "October 1983"
archive_link: false
archiveurl: "https://www.americanradiohistory.com/Archive-Electronics-Today/Canada/80s/ETI-1983-10-Canada.pdf"
volumeissue: "v7n10"
---

Interface binary-coded decimal (BCD) devices to the ZX81.