---
title: "Parallel Printer Port"
id: 24657
type: "product"
slug: "parallel-printer-port"
url: "http://localhost/product/parallel-printer-port/"
markdown_url: "http://localhost/product/parallel-printer-port.md"
published_at: "2020-01-19T20:03:46+00:00"
modified_at: "2026-03-22T13:13:16+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "This project was detailed completely in Syntax Quarterly, issues 1 & 2. Port is memory mapped at location FFFFh and is completely decoded. Project includes schematic, theory of operation sheeta and machine code listing comments of a copy routine for use with the Okidata ML80 and ML82A printers. Circuit and software can be adapted to…"
category:
  - name: "Printer"
    slug: "printer"
    taxonomy: "category"
    url: "http://localhost/category/hardware/printer/"
post_tag:
  - name: "John Oliger Co."
    slug: "john-oliger-co"
    taxonomy: "post_tag"
    url: "http://localhost/tag/john-oliger-co/"
  - 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: "Printer"
    slug: "printer"
    taxonomy: "genre"
    url: "http://localhost/type/printer/"
company:
  id: 10990
  title: "John Oliger Co."
  type: "company"
  url: "http://localhost/company/john-oliger-co/"
price: 20.95
date: 1984
rarity: "Uncommon"
related_content:
  - id: 25116
    title: "Build Your Own EPROM Programmer and Centronics Printer Interface – Part I"
    type: "article"
    url: "http://localhost/article/build-your-own-eprom-programmer-and-centronics-printer-interface-part-i/"
  - id: 25104
    title: "Build Your Own EPROM Programmer and Centronics Printer Interface – Part II"
    type: "article"
    url: "http://localhost/article/build-your-own-eprom-programmer-and-centronics-printer-interface-part-ii/"
companies_products:
  - id: 10990
    title: "John Oliger Co."
    type: "company"
    url: "http://localhost/company/john-oliger-co/"
---

# Parallel Printer Port

This project was detailed completely in Syntax Quarterly, issues 1 & 2. Port is memory mapped at location FFFFh and is completely decoded. Project includes schematic, theory of operation sheeta and machine code listing comments of a copy routine for use with the Okidata ML80 and ML82A printers. Circuit and software can be adapted to most other Centronic compatible printers.

To achieve full use of the BASIC printer commands, the Sinclair ROM must be patched by putting it in EPROM.