---
title: "The 2040 Printer Interface"
type: "article"
slug: "the-2040-printer-interface"
url: "http://localhost/article/the-2040-printer-interface/"
markdown_url: "http://localhost/article/the-2040-printer-interface.md"
published_at: "2022-01-11T10:46:54+00:00"
modified_at: "2024-05-26T13:11:57+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Discussion of how the 74LS10 triple 3-input NAND in plug portion decode the device to port FB (and many others). Notes that, according to Wes Brzozowski, decoding logic for an I/O port should check that M1 is high to prevent accidental activation during an interrupt."
category:
  - name: "Sinc-Link"
    slug: "sinc-link"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/sinc-link/"
post_tag:
  - name: "TS 2040"
    slug: "ts2040"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts2040/"
  - name: "TS 2068"
    slug: "ts2068"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts2068/"
model:
  - name: "Timex/Sinclair 2068"
    slug: "ts-2068"
    taxonomy: "model"
    url: "http://localhost/model/ts-2068/"
indiv:
  - name: "Cameron Hayne"
    slug: "cameron-hayne"
    taxonomy: "indiv"
    url: "http://localhost/indiv/cameron-hayne/"
publication: "Sinc-Link"
publication_r:
  id: 10240
  title: "Sinc-Link"
  type: "periodical"
  url: "http://localhost/periodical/sinc-link/"
authors: "Cameron Hayne"
volume: "3"
issue: "4"
issues_articles:
  - id: 38191
    title: "Sinc-Link v3 n4"
    type: "issue"
    url: "http://localhost/issue/sinc-link-v3-n4/"
pages: "8"
pubdate: "July/August 1985"
archive_link: false
volumeissue: "v3n4"
---

# The 2040 Printer Interface

Discussion of how the 74LS10 triple 3-input NAND in plug portion decode the device to port FB (and many others). Notes that, according to [Wes Brzozowski](http://localhost/tag/wes-brzozowski/), decoding logic for an I/O port should check that M1 is high to prevent accidental activation during an interrupt.