---
title: "A Right-to-Left Pixel-by-Pixel Screen Scroll"
type: "article"
slug: "a-right-to-left-pixel-by-pixel-screen-scroll"
url: "http://localhost/article/a-right-to-left-pixel-by-pixel-screen-scroll/"
markdown_url: "http://localhost/article/a-right-to-left-pixel-by-pixel-screen-scroll.md"
published_at: "2020-10-27T21:09:59+00:00"
modified_at: "2025-11-04T13:24:15+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "The following machine code program can be located anywhere you wish. It is very easy to double a number that is given in binary, just as it is very easy to multiply a number by 10 if it is given in decimal — in each case, you Just add a 0 on the right."
category:
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  - name: "Type-in program"
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    url: "http://localhost/tag/type-in-program/"
model:
  - name: "Timex/Sinclair 2068"
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    url: "http://localhost/model/ts-2068/"
indiv:
  - name: "Dick Scoville"
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publication: "T-S Horizons"
publication_r:
  id: 10247
  title: "T-S Horizons"
  type: "periodical"
  url: "http://localhost/periodical/t-s-horizons/"
authors: "Dick Scoville"
issue: "18"
issues_articles:
  - id: 26861
    title: "T-S Horizons n18"
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pages: "13"
pubdate: "April 1986"
archive_link: false
volumeissue: "vn18"
---

# A Right-to-Left Pixel-by-Pixel Screen Scroll

The following machine code program can be located anywhere you wish. It is very easy to double a number that is given in binary, just as it is very easy to multiply a number by 10 if it is given in decimal — in each case, you Just add a 0 on the right.