---
title: "ZX81/TS1000 Tips"
type: "article"
slug: "zx81-ts1000-tips-15"
url: "http://localhost/article/zx81-ts1000-tips-15/"
markdown_url: "http://localhost/article/zx81-ts1000-tips-15.md"
published_at: "2025-07-28T00:53:50+00:00"
modified_at: "2025-07-28T00:53:51+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "To determine the address of ‘UPLOAD’, PEEK 16511 + 256 x PEEK 16512 + 4 using a direct command. Then add this number to 16514. The result will be the required address. In my example there are no extra bytes in 1 REM. Therefore the PEEK would give 86. 16514 + 86 = 16600."
category:
  - name: "The Data Expansion"
    slug: "the-data-expansion"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/the-data-expansion/"
post_tag:
  - 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/"
indiv:
  - name: "Don Lamen"
    slug: "don-lamen"
    taxonomy: "indiv"
    url: "http://localhost/indiv/don-lamen/"
publication_r:
  id: 50143
  title: "The Data Expansion"
  type: "periodical"
  url: "http://localhost/periodical/the-data-expansion/"
authors_r:
  - name: "Don Lamen"
    slug: "don-lamen"
    taxonomy: "indiv"
    url: "http://localhost/indiv/don-lamen/"
volume: "5"
issue: "4"
issues_articles:
  - id: 50246
    title: "The Data Expansion v5 n4"
    type: "issue"
    url: "http://localhost/issue/the-data-expansion-v5-n4/"
pages: "3-4"
pubdate: "April 1988"
archive_link: false
---

# ZX81/TS1000 Tips

To determine the address of ‘UPLOAD’, PEEK 16511 + 256 x PEEK 16512 + 4 using a direct command. Then add this number to 16514. The result will be the required address. In my example there are no extra bytes in 1 REM. Therefore the PEEK would give 86. 16514 + 86 = 16600.