---
title: "Black Screen/White Letters"
type: "article"
slug: "black-screen-white-letters"
url: "http://localhost/article/black-screen-white-letters/"
markdown_url: "http://localhost/article/black-screen-white-letters.md"
published_at: "2026-03-13T18:34:19+00:00"
modified_at: "2026-03-13T18:34:20+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Provides a machine-code POKE sequence of 20 values for setting a black screen background with white lettering on the ZX81/TS1000. A compact display customization tip for users who prefer the reversed video appearance. Useful for programs seeking improved contrast."
category:
  - name: "The Sinc Times"
    slug: "the-sinc-times"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/the-sinc-times/"
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/"
indiv:
  - name: "Steve Berg"
    slug: "steve-berg"
    taxonomy: "indiv"
    url: "http://localhost/indiv/steve-berg/"
publication_r:
  id: 21222
  title: "The Sinc Times"
  type: "periodical"
  url: "http://localhost/periodical/the-sinc-times/"
authors_r:
  - name: "Steve Berg"
    slug: "steve-berg"
    taxonomy: "indiv"
    url: "http://localhost/indiv/steve-berg/"
volume: "3"
issue: "1"
issues_articles:
  - id: 50277
    title: "The Sinc Times Vol 3 No 1"
    type: "issue"
    url: "http://localhost/issue/the-sinc-times-vol-3-no-1/"
pages: "5"
pubdate: "February 1987"
archive_link: false
---

Provides a machine-code POKE sequence of 20 values for setting a black screen background with white lettering on the ZX81/TS1000. A compact display customization tip for users who prefer the reversed video appearance. Useful for programs seeking improved contrast.