---
title: "MEMIC-81"
id: 13272
type: "product"
slug: "memic-81"
url: "http://localhost/product/memic-81/"
markdown_url: "http://localhost/product/memic-81.md"
published_at: "2019-11-30T01:42:08+00:00"
modified_at: "2026-03-22T13:13:33+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Contains one or two 2K (6116) CMOS RAM chips. Memory is addressed into the ROM area from 8K-16K in the ZX-81 memory map. The address at which each chip appears can be adjusted to any 2K section within that area. Lithium battery in the unit provides a back-up power while the computer is switched off."
category:
  - name: "RAM"
    slug: "ram"
    taxonomy: "category"
    url: "http://localhost/category/hardware/ram/"
post_tag:
  - name: "Cambridge Microelectronics"
    slug: "cambridge-microelectronics"
    taxonomy: "post_tag"
    url: "http://localhost/tag/cambridge-microelectronics/"
  - name: "Gladstone Electronics"
    slug: "gladstone-electronics"
    taxonomy: "post_tag"
    url: "http://localhost/tag/gladstone-electronics/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
model:
  - 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: 11088
  title: "Cambridge Microelectronics"
  type: "company"
  url: "http://localhost/company/cambridge-microelectronics/"
price: 69.95
date: 1982
rarity: "Uncommon"
adverts:
  - publication:
      - id: 26649
        title: "SYNC v3 n3"
        type: "issue"
        url: "http://localhost/issue/sync-v3-n3/"
    advert_page: "33"
companies_products:
  - id: 11088
    title: "Cambridge Microelectronics"
    type: "company"
    url: "http://localhost/company/cambridge-microelectronics/"
  - id: 10902
    title: "Gladstone Electronics"
    type: "company"
    url: "http://localhost/company/gladstone-electronics/"
---

# MEMIC-81

Contains one or two 2K (6116) CMOS RAM chips. Memory is addressed into the ROM area from 8K-16K in the ZX-81 memory map. The address at which each chip appears can be adjusted to any 2K section within that area.

Lithium battery in the unit provides a back-up power while the computer is switched off.