Programming the 1985 Radio Shack Science Fair Microcomputer Trainer

This is my 2nd video about the Science Fair Microcomputer Trainer from Radio Shack. Thanks again to Jason J. for pointing out that the machine was released in 1985, not in 1976. Although much less revolutionary than previously thought (given that both the Busch Microtronic as well as the Gakken FX R-165 were released in 1981) it is still an interesting machine that deserves a more in-depth hand-on presentation - hence this video.Enjoy!

[@jeffocks793]

Great stuff! I seem to have 2 of these, the booklet I found fascinating at the time. I hope you have that. Yes the Gakken comes with a magazine in a curious mix of English and Japanese. Great to see your deep dive! Thanks

[@derekchristenson5711]

Very nice! I wish I had had one of these back in the day.

[@mmille10]

I felt like I could follow the steps you were entering, but I was wondering, "What's the goal of the program? What am I looking for in the result(s)?"

[@michaelwessel4953]

The main purpose of the program is to cover a large subset of the instruction set (keypad input, hex & LED output, index memory, arithmetics, compares, conditional branching, sound, ...). The "goal" of the program is mentioned from 5'20 on: "it's waiting for a keypad input this program and now I can enter values which are then added... and we are storing these values in the data region of the machine so we can inspect them later using the monitor". So, a 4bit adder with sound and light effects that stores its arguments in memory as well.

[@mmille10]

@@michaelwessel4953- Okay, thanks. The "4-bit adder" description was what I was looking for. :)

[@VulcanOnWheels]

Your English is quite good, but please...pronounce "inaccuracies" emphasizing the second syllable.