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From the Mind of Tim Swenson

This simple web page is a parking location for my writing across a number of subjects.


Sinclair ZX81

Assembly Language on the ZX81: An Updated Getting Started Guide

This paper details the tools and techniques for writing Z80 assembly programs for the ZX81 using cross-compling tools and emulators. That paper with the source code is available here.

One Dimensional Cellular Automata and the ZX81

This paper details the implementation of One Dimensional Cellular Automata on the ZX81 and shows that the ZX81 could have been used for Computer Science research when it was on the market.

MCODER2 Tutorial

This paper walks the user through the process of using MCODER2 to compiler ZX BASIC programs. Shows that MCODER2 is compatible with tools like ZXTEXT2P.

Prime Number Algorithm

This paper discusses an algorithm to quickly find out if a number is a prime number. Algorithm by Mike Fink.


Sinclair QL

QL Hackers Journal

This e-zine was published from 1991 until 2001, and covered programming topics on the Sinclair QL.


Gaming

Minimal Space Combat: The Book

Minimal Space Combat is a very simple game of tactical space combat between ships. This version includes the a tutorial, Designer Notes, strategic rules, etc. all in a single PDF.


Ogre: From Microgame to Maxigame

90 page book that details the history of the board games Ogre and GEV, designed by Steve Jackson.



This booklet documents the history of the board game Ogre, designed by Steve Jackson Games.

Union City History

Most of my papers on Union City and Local History are available at the Museum of Local History web site ). A few that are not available on that site are here.

Where in Union City?

A picture document with close-up photographs from around Union City with the reader guessing where in Union City the photographs are from. Includes answer pages with zoomed out photographs.

Assasination in Decoto

A paper detailing the shooting death of Union City Police Chief William Cann and the events that lead to his death.

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Timothy Swenson,
Feb 28, 2015, 4:22 PM
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CA_basic.zip
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Timothy Swenson,
Dec 26, 2013, 10:51 AM
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CA_c.zip
(6k)
Timothy Swenson,
Dec 26, 2013, 10:50 AM
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Cann.pdf
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Timothy Swenson,
Dec 16, 2013, 9:02 PM
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MCODER2source.zip
(3k)
Timothy Swenson,
Dec 26, 2013, 10:50 AM
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Timothy Swenson,
Dec 16, 2013, 8:58 PM
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Timothy Swenson,
Dec 24, 2014, 4:32 PM
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Timothy Swenson,
Dec 16, 2013, 8:57 PM
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Timothy Swenson,
Dec 16, 2013, 9:02 PM
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Timothy Swenson,
Dec 16, 2013, 8:52 PM
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ZXzine01.pdf
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Timothy Swenson,
Jul 23, 2015, 7:40 PM
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ZXzine01.zip
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Timothy Swenson,
Jul 23, 2015, 7:41 PM
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ZXzine2.pdf
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Timothy Swenson,
Oct 25, 2015, 6:32 PM
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ZXzine2.zip
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Timothy Swenson,
Oct 25, 2015, 6:33 PM
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ZXzine3.pdf
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Timothy Swenson,
Oct 29, 2016, 8:21 PM
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ZXzine3.zip
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Timothy Swenson,
Oct 29, 2016, 8:21 PM
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Timothy Swenson,
Dec 26, 2013, 10:50 AM
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Timothy Swenson,
Jan 19, 2014, 5:38 PM
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qhjall.zip
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Timothy Swenson,
Dec 16, 2013, 8:58 PM
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Timothy Swenson,
Jun 15, 2015, 9:03 PM
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smsqzine01.zip
(42k)
Timothy Swenson,
Jun 15, 2015, 9:03 PM
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Timothy Swenson,
Sep 30, 2015, 7:55 PM
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smsqzine02.zip
(10k)
Timothy Swenson,
Sep 30, 2015, 7:56 PM
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Timothy Swenson,
Jun 22, 2016, 7:51 PM
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smsqzine3.zip
(8k)
Timothy Swenson,
Jun 22, 2016, 7:51 PM