---
title: "Upgrading VU-Calc 1000"
type: "article"
slug: "upgrading-vu-calc-1000"
url: "http://localhost/article/upgrading-vu-calc-1000/"
markdown_url: "http://localhost/article/upgrading-vu-calc-1000.md"
published_at: "2020-10-27T17:09:43+00:00"
modified_at: "2024-05-26T14:34:55+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "VU-CALC for the ZX81/TS1000-1500 is a good program, but it has some limitations. Fortunately, modifications can easily be made which overcome these three limitations."
category:
  - name: "SyncWare News"
    slug: "syncware-news"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/syncware-news/"
post_tag:
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "TS 1500"
    slug: "ts1500"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1500/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
  - name: "VU-Calc"
    slug: "vu-calc"
    taxonomy: "post_tag"
    url: "http://localhost/tag/vu-calc/"
  - name: "ZX81"
    slug: "zx81"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx81/"
model:
  - name: "Sinclair ZX81"
    slug: "zx81"
    taxonomy: "model"
    url: "http://localhost/model/zx81/"
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
  - name: "Timex/Sinclair 1500"
    slug: "ts-1500"
    taxonomy: "model"
    url: "http://localhost/model/ts-1500/"
indiv:
  - name: "Charles Peterson"
    slug: "charles-peterson"
    taxonomy: "indiv"
    url: "http://localhost/indiv/charles-peterson/"
publication: "SyncWare News"
publication_r:
  id: 10245
  title: "SyncWare News"
  type: "periodical"
  url: "http://localhost/periodical/syncware-news/"
authors: "Charles Peterson"
volume: "3"
issue: "5"
issues_articles:
  - id: 26686
    title: "SyncWare News v3 n5"
    type: "issue"
    url: "http://localhost/issue/syncware-news-v3-n5/"
pages: "19-20"
pubdate: "May-June 1986"
archive_link: false
volumeissue: "v3n5"
---

# Upgrading VU-Calc 1000

VU-CALC for the ZX81/TS1000-1500 is a good program, but it has some limitations. Fortunately, modifications can easily be made which overcome these three limitations.