---
title: "ZX81 RTTY Transmit/Receive Program & Interface"
type: "article"
slug: "zx81-rtty-transmit-receive-program-interface"
url: "http://localhost/article/zx81-rtty-transmit-receive-program-interface/"
markdown_url: "http://localhost/article/zx81-rtty-transmit-receive-program-interface.md"
published_at: "2026-01-12T20:58:22+00:00"
modified_at: "2026-01-12T20:58:23+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Here is a nice RTTY transmit and receive program with the required hardware interface."
category:
  - name: "QZX"
    slug: "qzx"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/qzx/"
post_tag:
  - name: "Hardware project"
    slug: "hardware-project"
    taxonomy: "post_tag"
    url: "http://localhost/tag/hardware-project/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
publication_r:
  id: 21219
  title: "QZX"
  type: "periodical"
  url: "http://localhost/periodical/qzx/"
authors: "AF8J and WBUJB"
volume: "1"
issue: "5"
issues_articles:
  - id: 62159
    title: "QZX v1 n5"
    type: "issue"
    url: "http://localhost/issue/qzx-v1-n5/"
pages: "9, 13-14"
pubdate: "April 1983"
archive_link: false
---

# ZX81 RTTY Transmit/Receive Program & Interface

Here is a nice RTTY transmit and receive program with the required hardware interface.