---
title: "Newsletter Exchange: Smooth Scrolling Machine Code for TS1000"
type: "article"
slug: "newsletter-exchange-smooth-scrolling-machine-code-for-ts1000"
url: "http://localhost/article/newsletter-exchange-smooth-scrolling-machine-code-for-ts1000/"
markdown_url: "http://localhost/article/newsletter-exchange-smooth-scrolling-machine-code-for-ts1000.md"
published_at: "2026-03-14T13:07:05+00:00"
modified_at: "2026-03-14T13:07:06+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Machine code program from CATS N/L (Sept. 85) for the TS1000 stored safely above RAMTOP. Provides smooth, non-jerky scrolling in four directions (up, down, left, right) via LET Z=USR x with constants for each scroll direction. POKEd into memory from hex DATA statements."
category:
  - name: "Timelinez"
    slug: "timelinez"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/timelinez/"
post_tag:
  - name: "Machine language programming"
    slug: "machine-language"
    taxonomy: "post_tag"
    url: "http://localhost/tag/machine-language/"
  - name: "TS 1000"
    slug: "ts1000"
    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/"
publication_r:
  id: 21571
  title: "Timelinez"
  type: "periodical"
  url: "http://localhost/periodical/timelinez/"
volume: "3"
issue: "10"
issues_articles:
  - id: 38827
    title: "Timelinez v3 n10/11"
    type: "issue"
    url: "http://localhost/issue/timelinez-v3-n10-11/"
pages: "5"
pubdate: "October/November 1985"
archive_link: false
---

# Newsletter Exchange: Smooth Scrolling Machine Code for TS1000

Machine code program from CATS N/L (Sept. 85) for the TS1000 stored safely above RAMTOP. Provides smooth, non-jerky scrolling in four directions (up, down, left, right) via LET Z=USR x with constants for each scroll direction. POKEd into memory from hex DATA statements.