---
title: "ML Scroll Routine"
type: "article"
slug: "ml-scroll-routine"
url: "http://localhost/article/ml-scroll-routine/"
markdown_url: "http://localhost/article/ml-scroll-routine.md"
published_at: "2020-10-27T17:12:05+00:00"
modified_at: "2024-06-23T00:45:02+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "In 1K ZX80s, large programs easily overfill the 24 available screen lines. This machine language routine deletes the top line from the screen so you can add lines to the bottom."
category:
  - name: "Syntax"
    slug: "syntax"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/syntax/"
post_tag:
  - name: "1981"
    slug: "year-1981"
    taxonomy: "post_tag"
    url: "http://localhost/tag/year-1981/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
  - name: "ZX80"
    slug: "zx80"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx80/"
model:
  - name: "Sinclair ZX80"
    slug: "zx80"
    taxonomy: "model"
    url: "http://localhost/model/zx80/"
indiv:
  - name: "Ken Berggren"
    slug: "ken-berggren"
    taxonomy: "indiv"
    url: "http://localhost/indiv/ken-berggren/"
publication: "Syntax"
publication_r:
  id: 10246
  title: "Syntax"
  type: "periodical"
  url: "http://localhost/periodical/syntax/"
authors: "Ken Berggren"
volume: "2"
issue: "8"
issues_articles:
  - id: 26700
    title: "Syntax/Syntax ZX80 v2 n8"
    type: "issue"
    url: "http://localhost/issue/syntax-syntax-zx80-v2-n8/"
pages: "15"
pubdate: "August 1981"
archive_link: false
volumeissue: "v2n8"
---

# ML Scroll Routine

In 1K ZX80s, large programs easily overfill the 24 available screen lines. This machine language routine deletes the top line from the screen so you can add lines to the bottom.