The Authoritative Website for Timex/Sinclair Computers
Here are some of the tools and programs I’ve been using to archive cassettes and disks for Timex/Sinclair computers. Audacity Available for Windows, Linux and Mac computers, Audacity is my go-to for converting cassette tapes to digital files. Audacity can record from just about any audio input source on your computer.
Modern Tools for Working With TS Computers and SoftwareRead More »
Here’s a concise list of articles about machine language programming on the TS 2068.
Machine Language Programming on the Timex/Sinclair 2068Read More »
The TS 1500 video signal includes the back porch, a part of the video signal important to setting the black level and overall contrast. This is an improvement over most Sinclair ZX81 and some Timex/Sinclair 1000 computers, which did not produce the signal.
In the late 1970s, computer hobbyists in Chicago set up the first public-access computerized bulletin board system (BBS). Inspired by physical bulletin boards in grocery stores and other public locations, bulletin board systems offered computer enthusiasts a way to communicate directly outside of user group meetings.
CP/M was a command-line disk operating system, initially developed for Intel 8080-based home and small business computers. Gary Kildall, who developed it, brought features and tools he’d used on mainframes and minicomputers to small computers with CP/M. CP/M offered a universal, consistent interface to between the hardware, operating system and software.
Two power supplies in the TS 2068 provide the 5 volts necessary for the computer’s CPU, ROM, RAM, SCLD, logic chips, and 12 volts for the video modulator. The primary power supply uses the LM78S40 switching voltage regulator to produce 5 volts. This voltage regulator has an op amp that drives the internal speaker.
This week I began reading and using “Timex Sinclair Color Graphics” by Nick Hampshire. I mentioned this book in my first blog entry. As a reminder, you can find a description and a pdf of the book here.
Overview: Timex Sinclair Color Graphics, Chapter 1: “Colour Plotting”Read More »
I have not always been a fan of the Timex/Sinclair 2068 computer. Maybe this isn’t the best way to begin my first blog entry on David Anderson’s TimexSinclair.com website. Yet, that first sentence does show a bit of hope, don’t you agree? I haven’t always been an admirer of this relatively rare home computer from the early 1980s because I didn’t know it existed until the mid-1990s.
In 2021, Neil Cohen sent a few TS 2068 computers in various states of repair. One computer had a home-brew RGB converter built inside and around the composite video output jack. Here’s what it looked like when I opened the case. I extracted the board, disconnected it and traced the circuit as best I could.
In late 1983, an employee at an energy company submitted a request for improved performance maps for a gas compressor. The employee felt that the existing maps were inaccurate and prevented him from doing his job correctly.
Plotting Compressor Performance with the T/S 2068Read More »
It’s been 39 years since I wrote the adventure game “The Trident” and submitted it to Timex for inclusion in their software collection. Back then, I had played all of the Adventure International games by Scott Adams, Zork, the Original (Colossal Cave) Adventure with all its various enhancements, to name just a few.