John Mathewson
1852 Appleford St., Gloucester, Ontario K1J 6T4 Canada
John Mathewson was president of the Ottawa-Hull Timex Sinclair User Group for a number of years. He developed a number of unique accessories for the TS 2068, including external keyboards and an adapter to allow use of cartridges via the rear expansion buss.
Products
| Name | Description | Computers |
|---|---|---|
| Cartridge Adaptor | Allows you to plug cartridge peripherals into the rear expansion bus of the TS 2068 computer. Unit includes a through connector to allow connection of other peripherals. | Timex/Sinclair 2068 |
| Keyboard System | 47 key keyboard with interconnecting cable, interface card, wooden cabinet and keycap legends. Plugs into cartridge port of 2068. Includes single key entry for EDIT, DELETE, CAPS and cursor keys. | Timex/Sinclair 2068 |
| RGB Interface Unit | Connect TS2068 to an RGB monitor. Plugs into rear expansion connector. Includes through-buss connector. | Timex/Sinclair 2068 |
| Sound Booster | Plugs into rear port, amplifies BEEP and SOUND output. Has pass-through buss. | Timex/Sinclair 2068 |
| Spectrum Interface | This device was designed specifically for connecting the DISCIPLE disk system to the TS2068. It was a “twister” board that included 9 and 12 volt power supplies. | Timex/Sinclair 2068 |
| Spectrum Joystick Interface | Fully decoded interface for use with Spectrum programs requiring a Kempston joystick interface. Designed to work with 9-pin Atari type joysticks. Intended for use with TS2068 operating in Spectrum mode using either a ROM switch or emulator. | Timex/Sinclair 2068 |
| TS2068 Speech Synthesizer | Fully-decoded speech synthesizer that can be used to add speech to your existing programs or to include speech in your new programs. Uses the General Instruments SPO256A speech synthesizer chip; allows you to say virtually anything in English. Includes its own audio amplifier, filter and volume control. 9v battery provides power. Audio output drives 8 | Timex/Sinclair 2068 |
Books
Periodicals
Documents
Downloads
Articles
| Title | Description | Computers |
|---|---|---|
| Biorhythms | Graphic implementation of biorhythm charts. | Timex/Sinclair 2068 |
| For Your Sinclair | Desktop publishing software from Lemke Software Development and Charles Stelding. Z88, Spectrum +3 announcement. Notes about Second Annual Midwest Timex Sinclair Computer Fest. PC8300, products from John Mathewson, Specterm 64, Larken disk interface, Sharp’s, more. | Cambridge Z88, Timex/Sinclair 2068 |
| For Your Sinclair: New Releases | External keyboard for TS2068, sound booster, RGB interface and cartridge adaptor from John Mathewson. Utility tape for TS1000/ZX81/TS1500 from LST Software. PC-DRAW from MDM Enterprises. Compuserve announces GIF format. Desktop publishing program from Charles Stelding. Hardware/software to print to Commodore 1520 plotter. Archive utilties for QL. | Sinclair QL, Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| From the President | Notes about the state of the Timex community, including Timex of Portugal’s TC 2068 computer. | |
| Meetings in Review | Highlights from meetings from April to June 1987. Michael Dove demonstrated a four-way pixel scrolling program. David Solly demonstrated alternate character sets. John Mathewson showed his prototype MIDI interface. Harry Rosewarne gave a demo on techniques of integers. | |
| 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 | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| President's Address | Introductory welcome to the newsletter. | |
| President's Address | Discussion of creating a public domain software library. | |
| President's Address | Discussion about building club’s library. | |
| President's Address | Notes about club meetings. | |
| President's Address | Review of the previous year. | |
| President's Address | Notes about activities at the April 1985 meeting. | |
| President's Address | Notes about low attendance at summer meetings; author’s experience setting up a Larken disk system. | |
| President's Address | Comments about club activities. Author’s experience with Oliger printer interface and Prowriter printer. | |
| President's Comments | Comments about club organization; notes about the AERCO disk drive system. | |
| Programming Tips - General | Machine code hint; using IN to read the keyboard; notes about the TS 2068; a screen drawing program for the TS 1000. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Ways To Skin a Cat | Two programs for picking Lotto 649 numbers. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
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