---
title: "Timex Sinclair Online User Group July 3, 2023"
id: 53619
type: "video"
slug: "timex-sinclair-online-user-group-july-3-2023"
url: "http://localhost/video/timex-sinclair-online-user-group-july-3-2023/"
markdown_url: "http://localhost/video/timex-sinclair-online-user-group-july-3-2023.md"
published_at: "2024-05-05T20:52:58+00:00"
modified_at: "2024-05-05T20:52:59+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2023/07/maxresdefault-3.jpg"
excerpt: "Clark Calkins joined us for this meeting. Clark had a long career in computer programming and worked for a brief bit, part-time, for A & J Microdrive. He also wrote a real-time, embedded operating system for the Timex/Sinclair 1000 based on CP/M."
category:
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post_tag:
  - name: "Timex Sinclair Online User Group"
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  - name: "TS 1000"
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indiv:
  - name: "Clark Calkins"
    slug: "clark-calkins"
    taxonomy: "indiv"
    url: "http://localhost/indiv/clark-calkins/"
  - name: "Ingo Schmied"
    slug: "ingo-schmied"
    taxonomy: "indiv"
    url: "http://localhost/indiv/ingo-schmied/"
video_date: "20230703"
---

# Timex Sinclair Online User Group July 3, 2023

Clark Calkins joined us for this meeting. Clark had a long career in computer programming and worked for a brief bit, part-time, for A & J Microdrive. He also wrote a real-time, embedded operating system for the Timex/Sinclair 1000 based on CP/M. Clark’s work included a well-commented decompiler for CP/M that could produce source code from a live CP/M running on a computer.

You can learn more about Clark and his work here:  
 https://www.timexsinclair.com/indiv/clark-calkins/

Clark’s software is archived here: https://archive.org/details/clark-a-calkins

Ingo Schmied updated us on his keyboard and 3D printed case projects for the Timex/Sinclair 1000. You can see more about his projects on his website:  
 https://blog.codesurfer.dev/

## Youtube embed

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