---
title: "48K Memory Extension"
id: 11616
type: "product"
slug: "48k-memory-extension"
url: "http://localhost/product/48k-memory-extension/"
markdown_url: "http://localhost/product/48k-memory-extension.md"
published_at: "2019-11-30T01:13:36+00:00"
modified_at: "2026-03-22T13:23:02+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Allows ZX81 to run 48K Basic programs including up to 16K of assembly code. ZX81 sits on custom built case containing the Memotech."
category:
  - name: "RAM"
    slug: "ram"
    taxonomy: "category"
    url: "http://localhost/category/hardware/ram/"
post_tag:
  - name: "Memotech"
    slug: "memotech"
    taxonomy: "post_tag"
    url: "http://localhost/tag/memotech/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - 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/"
genre:
  - name: "Hardware"
    slug: "hardware"
    taxonomy: "genre"
    url: "http://localhost/type/hardware/"
  - name: "RAM"
    slug: "ram"
    taxonomy: "genre"
    url: "http://localhost/type/ram/"
company:
  id: 11090
  title: "Memotech"
  type: "company"
  url: "http://localhost/company/memotech/"
price: 129
rarity: "Uncommon"
producturl: "http://www.zx81stuff.org.uk/zx81/hardware/Memotech48K"
articles:
  - article:
      id: 24282
      title: "Resources (Sync v1 n5)"
      type: "article"
      url: "http://localhost/article/resources-sync-v1-n5/"
companies_products:
  - id: 11090
    title: "Memotech"
    type: "company"
    url: "http://localhost/company/memotech/"
---

# 48K Memory Extension

Allows ZX81 to run 48K Basic programs including up to 16K of assembly code. ZX81 sits on custom built case containing the Memotech.