---
title: "ZX-81/TS1000 Tips"
type: "article"
slug: "zx-81-ts1000-tips-2"
url: "http://localhost/article/zx-81-ts1000-tips-2/"
markdown_url: "http://localhost/article/zx-81-ts1000-tips-2.md"
published_at: "2026-03-15T01:19:53+00:00"
modified_at: "2026-03-15T01:19:54+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Two brief programming tips for ZX-81/TS1000 BASIC users: using a compact mathematical expression in place of PAUSE 200 to save memory bytes; and redimensioning arrays to their minimum size (e.g., DIM A$(0,0)) before saving a program to tape to reduce file size and save/load time, then restoring proper dimensions at line 0 so that GOTO…"
category:
  - name: "TS Bulletin"
    slug: "ts-bulletin"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/ts-bulletin/"
post_tag:
  - name: "BASIC (programming language)"
    slug: "basic-programming-language"
    taxonomy: "post_tag"
    url: "http://localhost/tag/basic-programming-language/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Bill Harmer"
    slug: "bill-harmer"
    taxonomy: "indiv"
    url: "http://localhost/indiv/bill-harmer/"
publication_r:
  id: 10282
  title: "TS Bulletin"
  type: "periodical"
  url: "http://localhost/periodical/ts-bulletin/"
authors_r:
  - name: "Bill Harmer"
    slug: "bill-harmer"
    taxonomy: "indiv"
    url: "http://localhost/indiv/bill-harmer/"
issue: "1"
issues_articles:
  - id: 33986
    title: "TS Bulletin 1-1990"
    type: "issue"
    url: "http://localhost/issue/ts-bulletin-1-1990/"
pages: "1"
pubdate: "January 1990"
archive_link: false
---

Two brief programming tips for ZX-81/TS1000 BASIC users: using a compact mathematical expression in place of PAUSE 200 to save memory bytes; and redimensioning arrays to their minimum size (e.g., DIM A$(0,0)) before saving a program to tape to reduce file size and save/load time, then restoring proper dimensions at line 0 so that GOTO 1 restarts without clearing data while RUN re-initializes cleanly.