---
title: "Experimenting With The Byte Back Modem"
id: 35590
type: "document"
slug: "experimenting-with-the-byte-back-modem"
url: "http://localhost/document/experimenting-with-the-byte-back-modem/"
markdown_url: "http://localhost/document/experimenting-with-the-byte-back-modem.md"
published_at: "2021-01-10T00:38:34+00:00"
modified_at: "2026-03-15T17:26:52+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "The Byte Back Modem doesn't use the Z80 in/out ports; it uses logic gates to activate the 8251 USART, which is used to send and receive data. Reprint of the article from T-S Horizons."
category:
  - name: "Documentation"
    slug: "documentation"
    taxonomy: "category"
    url: "http://localhost/category/documentation/"
post_tag:
  - name: "Byte-Back Co"
    slug: "byte-back-co"
    taxonomy: "post_tag"
    url: "http://localhost/tag/byte-back-co/"
  - 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: "TS 2068"
    slug: "ts2068"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts2068/"
  - 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/"
  - name: "Timex/Sinclair 2068"
    slug: "ts-2068"
    taxonomy: "model"
    url: "http://localhost/model/ts-2068/"
indiv:
  - name: "Gordon Young"
    slug: "gordon-young"
    taxonomy: "indiv"
    url: "http://localhost/indiv/gordon-young/"
doc_author: "Gordon Young"
document_url: "https://archive.org/details/byte-back/Experimenting%20With%20The%20Byte%20Back%20Modem"
pages: 3
document_date: "1985"
related_content:
  - id: 10711
    title: "Byte-Back Co"
    type: "company"
    url: "http://localhost/company/byte-back-co/"
  - id: 13338
    title: "MD-1 Modem"
    type: "product"
    url: "http://localhost/product/modem/"
---

# Experimenting With The Byte Back Modem

The Byte Back Modem doesn’t use the Z80 in/out ports; it uses logic gates to activate the 8251 USART, which is used to send and receive data. Reprint of the [article from T-S Horizons](http://localhost/article/experimenting-with-the-byte-back-modem/).