---
title: "ZX81 Window"
id: 14818
type: "product"
slug: "zx81-window"
url: "http://localhost/product/zx81-window/"
markdown_url: "http://localhost/product/zx81-window.md"
published_at: "2019-11-30T01:29:10+00:00"
modified_at: "2026-03-22T13:35:30+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Define any number of \"windows\" on screen. Scroll characters against any background or roll off one side of screen onto the other (wraparound effect including top to bottom). Machine language routine makes things \"fly\" around the screen when called from Basic. 1K."
category:
  - name: "Programming"
    slug: "programming"
    taxonomy: "category"
    url: "http://localhost/category/software/programming/"
post_tag:
  - name: "Ken Osborne (company)"
    slug: "ken-osborne"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ken-osborne/"
  - name: "ZX81"
    slug: "zx81"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx81/"
model:
  - name: "Sinclair ZX81"
    slug: "zx81"
    taxonomy: "model"
    url: "http://localhost/model/zx81/"
genre:
  - name: "Programming"
    slug: "programming"
    taxonomy: "genre"
    url: "http://localhost/type/programming/"
  - name: "Software"
    slug: "software"
    taxonomy: "genre"
    url: "http://localhost/type/software/"
company:
  id: 11016
  title: "Ken Osborne"
  type: "company"
  url: "http://localhost/company/ken-osborne/"
price: 8
date: 1983
rarity: "Uncommon"
articles:
  - article:
      id: 24413
      title: "Using Your Computer: Programs"
      type: "article"
      url: "http://localhost/article/using-your-computer-programs/"
companies_products:
  - id: 11016
    title: "Ken Osborne"
    type: "company"
    url: "http://localhost/company/ken-osborne/"
---

Define any number of “windows” on screen. Scroll characters against any background or roll off one side of screen onto the other (wraparound effect including top to bottom). Machine language routine makes things “fly” around the screen when called from Basic. 1K.