---
title: "Expanding Existing 16K Programs"
type: "article"
slug: "expanding-existing-16k-programs"
url: "http://localhost/article/expanding-existing-16k-programs/"
markdown_url: "http://localhost/article/expanding-existing-16k-programs.md"
published_at: "2020-10-27T17:12:40+00:00"
modified_at: "2024-06-23T01:08:36+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "If you upgraded to 48K RAM for your ZX81, you may think it simple to add a few program lines and enlarge the variable arrays in existing 16K RAM programs to utilize the increased memory capacity."
category:
  - name: "Syntax"
    slug: "syntax"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/syntax/"
post_tag:
  - name: "1982"
    slug: "year-1982"
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    url: "http://localhost/tag/year-1982/"
  - name: "Type-in program"
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    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
  - name: "ZX81"
    slug: "zx81"
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    url: "http://localhost/tag/zx81/"
model:
  - name: "Sinclair ZX81"
    slug: "zx81"
    taxonomy: "model"
    url: "http://localhost/model/zx81/"
indiv:
  - name: "R. Hensley"
    slug: "r-hensley"
    taxonomy: "indiv"
    url: "http://localhost/indiv/r-hensley/"
publication: "Syntax"
publication_r:
  id: 10246
  title: "Syntax"
  type: "periodical"
  url: "http://localhost/periodical/syntax/"
authors: "R. Hensley"
volume: "3"
issue: "6"
issues_articles:
  - id: 26705
    title: "Syntax/Syntax ZX80 v3 n6"
    type: "issue"
    url: "http://localhost/issue/syntax-syntax-zx80-v3-n6/"
pages: "15"
pubdate: "June 1982"
archive_link: false
volumeissue: "v3n6"
---

# Expanding Existing 16K Programs

If you upgraded to 48K RAM for your ZX81, you may think it simple to add a few program lines and enlarge the variable arrays in existing 16K RAM programs to utilize the increased memory capacity.