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The Authoritative Website for Timex/Sinclair Computers

The Authoritative Website for Timex/Sinclair Computers

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Home » John F. Jarrett

Search
Computers
- Sinclair
  - Sinclair ZX80
    - Articles
    - Books
    - Hardware
    - Software
  - Sinclair ZX81
    - Articles
  - Sinclair QL
    - Hardware
    - Software
  - Cambridge Z88
- Timex
- Other
  - MicroAce
    - Hardware
    - Articles
    - Software
    - Books
  - Lambda 8300
Downloadable Software
- ZX81/TS-1000
- TS-2068
Publications
Companies
- Sinclair
- Timex
- View All
Products
Community
About
Blog

John F. Jarrett

Location: Arizona

Companies

Computer Engineering Services (The Jarrett Company)

Articles

The Expandable ZX-80 and ZX-81

Recent Posts

T/S Horizons in Cash From Your ComputerJanuary 4, 2026
Timex Sinclair 2068 TimelineDecember 7, 2025
George Grimm on TimexDecember 3, 2025
Timex/Sinclair 2068: A Computer in Search of an AudienceNovember 10, 2025
The Man Who Tried to Save TimexNovember 6, 2025

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