---
title: "Timex/Sinclair 2000 System Software Home ROM Extension"
id: 52320
type: "document"
slug: "timex-sinclair-2000-system-software-home-rom-extension"
url: "http://localhost/document/timex-sinclair-2000-system-software-home-rom-extension/"
markdown_url: "http://localhost/document/timex-sinclair-2000-system-software-home-rom-extension.md"
published_at: "2023-12-26T22:33:22+00:00"
modified_at: "2026-03-15T19:50:29+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Z80 assembly language source code for the EXROM. This document is Lon Hildreth's working copy and contains his handwritten annotations."
category:
  - name: "Documentation"
    slug: "documentation"
    taxonomy: "category"
    url: "http://localhost/category/documentation/"
post_tag:
  - 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/"
indiv:
  - name: "Lon Hildreth"
    slug: "lon-hildreth"
    taxonomy: "indiv"
    url: "http://localhost/indiv/lon-hildreth/"
document_url: "https://archive.org/details/timex-computer-corp/Timex%20Sinclair%202000%20System%20Software%20Home%20ROM%20Extension/mode/1up"
pages: 88
document_date: "1983"
related_content:
  - id: 67507
    title: "Timex/Sinclair 2068 Extension ROM Disassembly"
    type: "document"
    url: "http://localhost/document/timex-sinclair-2068-extension-rom-disassembly/"
  - id: 67513
    title: "Timex/Sinclair 2068 Assembler Label Definitions"
    type: "document"
    url: "http://localhost/document/timex-sinclair-2068-assembler-label-definitions/"
document_publisher:
  - id: 11401
    title: "Timex Computer Corporation"
    type: "company"
    url: "http://localhost/company/timex-computer-corporation/"
---

Z80 assembly language source code for the EXROM.

This document is [Lon Hildreth’s](http://localhost/indiv/lon-hildreth/) working copy and contains his handwritten annotations.