---
title: "Memory Tester"
type: "article"
slug: "memory-tester"
url: "http://localhost/article/memory-tester/"
markdown_url: "http://localhost/article/memory-tester.md"
published_at: "2020-10-27T17:11:52+00:00"
modified_at: "2024-06-23T08:03:38+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "MEMTST writes all zeroes into a byte, confirms that all bits equal zero by reading the byte, writes all ones in the byte, confirms that bits are all ones by re-reading the byte, then moves to the next byte."
category:
  - name: "Syntax"
    slug: "syntax"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/syntax/"
post_tag:
  - name: "1983"
    slug: "year-1983"
    taxonomy: "post_tag"
    url: "http://localhost/tag/year-1983/"
  - name: "TS 1000"
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    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Ron Charlton"
    slug: "ron-charlton"
    taxonomy: "indiv"
    url: "http://localhost/indiv/ron-charlton/"
publication: "Syntax"
publication_r:
  id: 10246
  title: "Syntax"
  type: "periodical"
  url: "http://localhost/periodical/syntax/"
authors: "Ron Charlton"
volume: "4"
issue: "11"
issues_articles:
  - id: 26721
    title: "Syntax/Syntax ZX80 v4 n11"
    type: "issue"
    url: "http://localhost/issue/syntax-syntax-zx80-v4-n11/"
pages: "5"
pubdate: "November 1983"
archive_link: false
volumeissue: "v4n11"
---

# Memory Tester

MEMTST writes all zeroes into a byte, confirms that all bits equal zero by reading the byte, writes all ones in the byte, confirms that bits are all ones by re-reading the byte, then moves to the next byte.