---
title: "Line Recharacterizing — 4K and 8K"
type: "article"
slug: "line-recharacterizing-4k-and-8k"
url: "http://localhost/article/line-recharacterizing-4k-and-8k/"
markdown_url: "http://localhost/article/line-recharacterizing-4k-and-8k.md"
published_at: "2026-03-13T00:28:29+00:00"
modified_at: "2026-03-13T00:28:30+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Technique for replacing characters or keywords in a program without retyping, using FOR-PEEK-POKE loops to scan program memory and substitute character codes. Example replaces all AND keywords with OR, with separate versions for 4K and 8K ROM address spaces."
category:
  - name: "Syntax"
    slug: "syntax"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/syntax/"
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/"
  - name: "ZX80"
    slug: "zx80"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx80/"
model:
  - name: "Sinclair ZX80"
    slug: "zx80"
    taxonomy: "model"
    url: "http://localhost/model/zx80/"
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Daniel O'Connell"
    slug: "daniel-oconnell"
    taxonomy: "indiv"
    url: "http://localhost/indiv/daniel-oconnell/"
publication_r:
  id: 10246
  title: "Syntax"
  type: "periodical"
  url: "http://localhost/periodical/syntax/"
authors_r:
  - name: "Daniel O'Connell"
    slug: "daniel-oconnell"
    taxonomy: "indiv"
    url: "http://localhost/indiv/daniel-oconnell/"
volume: "3"
issue: "4"
issues_articles:
  - id: 52478
    title: "Syntax/Syntax ZX80 v3 n4"
    type: "issue"
    url: "http://localhost/issue/syntax-syntax-zx80-v3-n4/"
pages: "19"
pubdate: "April 1982"
archive_link: false
---

# Line Recharacterizing — 4K and 8K

Technique for replacing characters or keywords in a program without retyping, using FOR-PEEK-POKE loops to scan program memory and substitute character codes. Example replaces all AND keywords with OR, with separate versions for 4K and 8K ROM address spaces.