Here's mine in a couple of iterations. Bought used in 1984 for fifty bucks and it included the 16k. Within a year or so, I had a TI99 keyboard kludged on in a lovely plywood enclosure with added LOAD meter. Much, much later, I added a 32k chip on-board (only 16k enabled). Best was getting a dead TS1500 brought back from the dead a couple years ago. Muahaha IT'S ALIVE!
I did freelance photography and darkroom work for many years. I wrote a darkroom timer to run on the TS1000 that rivalled commercial timers and was probably much more flexible, since it allowed me to stop, speed up or skip steps to help recover from various processing missteps, temperature changes or reusing old chemistry. Some processes took 11 steps, subject to change as chemicals aged or my whim dictated. I could choose several different processes from a menu or jump into or out of a sequence already in progress. The timer routine itself was just a few lines of code that read an internal counter and converted that to a digital clock display under my control. Even if the program crashed, the counter kept ticking where I could continue the process and save the expensive color slide enlargements.
Reliability issues over hours of running the program nonstop led to my IBM hack. The initials stood for "I Built Mine" LOL. Before that I kept two TS1000s running my timer in case of a lockup. One was on channel two, the other on three. In a developing crisis, I'd simply switch channels and quickly get it back on step. In off hours, I would program or game on it. The TI99 keyboard and sturdy enclosure made it into a whole new machine on a miniscule budget.
I later wrote a more advanced port of it to run on my TI99 and used that for a decade or more. That was really fancy, with color, sound and speech to call out the processing steps. But the simplicity of the old TImex Timer program couldn't be duplicated on the TI. The TI had no internal counter so I instead used a series of nested for/next loops. That took a lot of testing to adjust for accuracy, but it was ultimately much more flexible than what the Timex could accomplish.
The open-board pics show my old TS1000 with internal 16K. 16k rampack and 16k memotech for a total of 48k. Pretty much a hardware exercise, I never did much with the expanded memory. But I sure woulda, if I had that capability back in the 80's when it was my main "confuser."
Edited by Ed in SoDak, Wed Nov 22, 2017 1:46 AM.