---
title: "Note Well"
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url: "http://localhost/article/note-well/"
markdown_url: "http://localhost/article/note-well.md"
published_at: "2021-06-26T12:21:52+00:00"
modified_at: "2024-05-26T13:41:29+00:00"
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excerpt: "John Mathewson has developed cartridge-based interface card and a twister board, either of which are used for connecting an improved keyboard. The twister board can be used with the ZX81/TS 1000. Bill Harmer has been developing a number of programs, including a TV pattern generator and a formula calculation engine. David Hinson developed a program…"
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  title: "Timex Sinclair User Group Newsletter: Ottawa Chapter"
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pubdate: "April 1987"
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    title: "John Mathewson"
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---

# Note Well

John Mathewson has developed cartridge-based interface card and a twister board, either of which are used for connecting an improved keyboard. The twister board can be used with the ZX81/TS 1000.

Bill Harmer has been developing a number of programs, including a TV pattern generator and a formula calculation engine.

David Hinson developed a program for architectural drawing that drives his X-Y plotter.