John Mathewson

1852 Appleford St., Gloucester, Ontario K1J 6T4 Canada
Custom keyboard and cartridge expansion connector.

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

NameDescriptionComputers
Cartridge AdaptorAllows 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 System47 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 UnitConnect TS2068 to an RGB monitor. Plugs into rear expansion connector. Includes through-buss connector.Timex/Sinclair 2068
Sound BoosterPlugs into rear port, amplifies BEEP and SOUND output. Has pass-through buss.Timex/Sinclair 2068
Spectrum InterfaceThis 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 InterfaceFully 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 SynthesizerFully-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 8Timex/Sinclair 2068

Documents

TitleDescriptionComputers
John Mathewson catalogProduct catalog listing available hardware and software for Timex/Sinclair computers.Timex/Sinclair 2068

Articles

TitleDescriptionComputers
BiorhythmsGraphic implementation of biorhythm charts.Timex/Sinclair 2068, Type-in program
For Your SinclairDesktop 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 ReleasesExternal 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 PresidentNotes about the state of the Timex community, including Timex of Portugal’s TC 2068 computer.
Meetings in ReviewHighlights 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 WellJohn 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 programTimex/Sinclair 1000, Timex/Sinclair 2068
President's AddressIntroductory welcome to the newsletter.
President's AddressDiscussion of creating a public domain software library.
President's AddressDiscussion about building club’s library.
President's AddressNotes about club meetings.
President's AddressReview of the previous year.
President's AddressNotes about activities at the April 1985 meeting.
President's AddressNotes about low attendance at summer meetings; author’s experience setting up a Larken disk system.
President's AddressComments about club activities. Author’s experience with Oliger printer interface and Prowriter printer.
President's CommentsComments about club organization; notes about the AERCO disk drive system.
Programming Tips - GeneralMachine 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, Type-in program
Ways To Skin a CatTwo programs for picking Lotto 649 numbers.Timex/Sinclair 1000, Timex/Sinclair 2068, Type-in program

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