---
title: "Sinclair IF1 Interface ROM Assembly"
id: 52296
type: "document"
slug: "sinclair-if1-interface-rom-assembly"
url: "http://localhost/document/sinclair-if1-interface-rom-assembly/"
markdown_url: "http://localhost/document/sinclair-if1-interface-rom-assembly.md"
published_at: "2023-12-26T19:38:11+00:00"
modified_at: "2026-03-15T19:49:43+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Complete assembly language source listing of the Sinclair Interface 1 (IF1) ROM, covering the Microdrive, LAN network, and RS232 software routines as implemented in the Spectrum Interface 1."
category:
  - name: "Documentation"
    slug: "documentation"
    taxonomy: "category"
    url: "http://localhost/category/documentation/"
post_tag:
  - name: "Sinclair Research Ltd."
    slug: "sinclair-research-ltd"
    taxonomy: "post_tag"
    url: "http://localhost/tag/sinclair-research-ltd/"
  - name: "Timex Computer Corporation"
    slug: "timex-computer-corporation"
    taxonomy: "post_tag"
    url: "http://localhost/tag/timex-computer-corporation/"
  - 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/"
document_url: "https://archive.org/details/timex-computer-corp/Sinclair%20IF1%20Interface%20ROM%20Assembly/mode/1up"
pages: 179
document_date: "April 29, 1983"
document_publisher:
  - id: 11292
    title: "Sinclair Research Ltd."
    type: "company"
    url: "http://localhost/company/sinclair-research-ltd/"
---

Complete assembly language source listing of the Sinclair Interface 1 (IF1) ROM, covering the Microdrive, LAN network, and RS232 software routines as implemented in the Spectrum Interface 1.