---
title: "Slow Mode for 4K ROM"
id: 13940
type: "product"
slug: "slow-mode-for-4k-rom"
url: "http://localhost/product/slow-mode-for-4k-rom/"
markdown_url: "http://localhost/product/slow-mode-for-4k-rom.md"
published_at: "2019-11-30T01:28:32+00:00"
modified_at: "2026-03-22T13:14:04+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Turn ZX80/MicroAce into a machine more powerful than the ZX81, e.g., run with either 4K or 8K ROMs."
category:
  - name: "Miscellaneous"
    slug: "misc"
    taxonomy: "category"
    url: "http://localhost/category/hardware/misc/"
post_tag:
  - name: "Advanced Digital Innovations"
    slug: "advanced-digital-innovations"
    taxonomy: "post_tag"
    url: "http://localhost/tag/advanced-digital-innovations/"
  - 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/"
genre:
  - name: "Hardware"
    slug: "hardware"
    taxonomy: "genre"
    url: "http://localhost/type/hardware/"
  - name: "Miscellaneous hardware"
    slug: "miscellaneous-hardware"
    taxonomy: "genre"
    url: "http://localhost/type/miscellaneous-hardware/"
company:
  id: 10630
  title: "Advanced Digital Innovations"
  type: "company"
  url: "http://localhost/company/advanced-digital-innovations/"
date: 1983
rarity: "Uncommon"
adverts:
  - publication:
      - id: 26649
        title: "SYNC v3 n3"
        type: "issue"
        url: "http://localhost/issue/sync-v3-n3/"
    advert_page: "39"
companies_products:
  - id: 10630
    title: "Advanced Digital Innovations"
    type: "company"
    url: "http://localhost/company/advanced-digital-innovations/"
---

# Slow Mode for 4K ROM

Turn ZX80/MicroAce into a machine more powerful than the ZX81, e.g., run with either 4K or 8K ROMs.