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If the de-funding and collapse of NASA continues, I may want to dig out my old SPARCstation and bootup FORTH. That's the era of space probes we'll revert to. I wonder if I still have any Harris 1802s somewhere...

I occasionally stumble across ancient boxes (nothing like cool NASA stuff). I've found that for anything with a processor and a serial port, FORTH is the fastest first probe. Using a tethered connection where the only software needed on the target system is: load a byte, store a byte, and run.

Wow, thank you.

I dare you reverse-engineer the test set for the Space Shuttle SRMS Display and Control Panel. My memory is failing. I think it's A1A8 or A8A1. Even the engineers who worked on it don't know how it works. 😂 No joke! The panel is just under the aft-bay window.

How could I find out what's inside these sealed modules and what they do? I tested various signals to learn their functions. Then @lumafield.bsky.social did a 3D CT scan to reveal the components (transistors, diodes, resistors, and capacitors) stacked inside.

I love the kind of brute-force aspect of a display like this.

📌

Nice ! I will share it with some colleagues in the space industry. They work on the modern versions 😁

"This board had ten white wires that had been cut, going to missing components labeled MP1, R2, L1, and L2. By studying the circuitry, I determined that MP1 had been a 4-kHz oscillator that provided the master clock for the Test Set. R1 was simply a potentiometer to adjust signal levels." R2 or R1?

Nice Nixie Digits. I guess no one can hack it through the Internet.🤭 The truth is out there!

Any magnetic core memory inside?

Thank you so much! 👍😎

Lunar Module Guidance & Navigation System (GNS)

just recognised you from "the other platform". keep up the good work!

Thank you for sharing this! Super cool