---
title: "TTL Serial Input/Output Port Package"
id: 14461
type: "product"
slug: "ttl-serial-input-output-port-package"
url: "http://localhost/product/ttl-serial-input-output-port-package/"
markdown_url: "http://localhost/product/ttl-serial-input-output-port-package.md"
published_at: "2019-11-30T01:28:32+00:00"
modified_at: "2026-03-22T13:14:03+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Software and plans for building input and output ports which fit inside a ZX81 or TS1000. When used with an RS232/TTL level converter, can connect to most RS232C peripherals."
category:
  - name: "RS232"
    slug: "rs232"
    taxonomy: "category"
    url: "http://localhost/category/hardware/rs232/"
post_tag:
  - name: "Cosmonics"
    slug: "cosmonics"
    taxonomy: "post_tag"
    url: "http://localhost/tag/cosmonics/"
  - 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: "RS232"
    slug: "rs232"
    taxonomy: "genre"
    url: "http://localhost/type/rs232/"
company:
  id: 10771
  title: "Cosmonics"
  type: "company"
  url: "http://localhost/company/cosmonics/"
price: 26
date: 1983
rarity: "Uncommon"
articles:
  - article:
      id: 24415
      title: "Extending Your Computer"
      type: "article"
      url: "http://localhost/article/extending-your-computer/"
companies_products:
  - id: 10771
    title: "Cosmonics"
    type: "company"
    url: "http://localhost/company/cosmonics/"
---

# TTL Serial Input/Output Port Package

Software and plans for building input and output ports which fit inside a ZX81 or TS1000. When used with an RS232/TTL level converter, can connect to most RS232C peripherals.