---
title: "Experiments in Memory and I/O Expansion"
type: "article"
slug: "experiments-in-memory-and-i-o-expansion"
url: "http://localhost/article/experiments-in-memory-and-i-o-expansion/"
markdown_url: "http://localhost/article/experiments-in-memory-and-i-o-expansion.md"
published_at: "2020-10-27T17:18:42+00:00"
modified_at: "2024-06-23T00:43:35+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "How memory works in the ZX80; adding RAM using 2114 chips; adding I/O; adding RAM using HM6116 CMOS chips."
category:
  - name: "SYNC"
    slug: "sync"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/sync/"
post_tag:
  - name: "1981"
    slug: "year-1981"
    taxonomy: "post_tag"
    url: "http://localhost/tag/year-1981/"
  - name: "Hardware project"
    slug: "hardware-project"
    taxonomy: "post_tag"
    url: "http://localhost/tag/hardware-project/"
  - 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/"
indiv:
  - name: "David Sommers"
    slug: "david-sommers"
    taxonomy: "indiv"
    url: "http://localhost/indiv/david-sommers/"
publication: "Sync"
publication_r:
  id: 10243
  title: "SYNC"
  type: "periodical"
  url: "http://localhost/periodical/sync-magazine/"
authors: "David Sommers"
volume: "1"
issue: "6"
issues_articles:
  - id: 26640
    title: "SYNC v1 n6"
    type: "issue"
    url: "http://localhost/issue/sync-v1-n6/"
pages: "20-23"
pubdate: "November/December 1981"
archive_link: false
volumeissue: "v1n6"
---

# Experiments in Memory and I/O Expansion

How memory works in the ZX80; adding RAM using 2114 chips; adding I/O; adding RAM using HM6116 CMOS chips.