Computers
Companies
- Timex Computer Corporation
  Timex brought the Timex Sinclair 1000, 1500 and 2068 to eager users in the early 1980s.
- Timex (TMX) Portugal
  The Timex facility in Portugal designed and produced computers, disk drive systems and more.
- Sinclair Research Ltd.
  Sinclair produced the first home computer available for under $200 and continued to develop innovative, unique home computers.
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  All the companies that supported the Sinclair and Timex/Sinclair users in the United States.
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  Add-ons or products that don't strictly fall in the hardware or software category.
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  All the books, commercial and small press, published about the Timex/Sinclair computers.
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  Learn about the people who made up the Timex/Sinclair community.
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  User groups were a popular way to meet and network with other users.
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Tree Systems of Grand Rapids

3645 28th St, Grand Rapids, MI 49608

Bob Alsum, owner.

Products

Pluri-Forth

Pluri-Forth is both an operating system and a programming language, replacing the Sinclair ROM entirely. FORTH programs were compiled and ran about 10 times faster than interpreter BASIC. Pluri-Forth offered multitasking, a feature not available in Basic. When used with the Sinclair ROM, the channel 2/3 switch is wired to the Pluri-Forth board to select

Downloadable TS 1000

Word processor written in Forth, for use with Pluri-Forth.

TS 1000

Articles

ForthTS 1000
Overview of Forth and review of Tree Systems PLURI-FORTH EPROM.
Hardware Review: MultiForth EPROM ChipTS 1000 Hardware review
Review of Tree Systems’ Forth EPROM, comparing it to IPS Forth.
The Forth CornerTS 1000 Software review Tutorial
Introduction to Forth and review of Pluri-Forth from Tree Systems.
The Forth CornerTS 1000 Tutorial
TreeForth
Source code for TreeFORTH (a ROMable, TS1000, slightly non-standard FORTH) has been released for non-commercial use by author Bob Alsum.

Documents

Computer Media

Pluri-Forth

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