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Suppose you're a good programmer, who even knows assembly language. As a test, someone sits you down in a plain room with a modern x64 PC. There's no operating system on it. (There's as much of a BIOS as there would need to be to boot it). You have a keyboard and a mouse,
and no other devices. Are you able to bootstrap this PC to the point where it has some user-controlled software, that could be expanded upon by you or anyone else? As far as I know, the answer is no. (I don't know how to do it, unless the BIOS was specially made for this).
What percentage of our computers are we able to program without using other fully-working computers to put the data in? What does this mean for the overall health of the system if there is a disruption, or software quality degrades?
In the minicomputer days, you had a row of switches on the front that you could use to input machine code to get yourself to a state of minimal ability to load more software. We just don't do that any more... https://i1.wp.com/avitech.com.au/wp-content/uploads/2016/05/11-70-front-panel-Medium.jpg …
Sounds like s cool idea for Zachtronics game
Zach and Keith from Zachtronics actually had an abandoned project (not a game) called "Project Gibson" which was them trying to design, assemble, and bootstrap an actual Z80 microcomputer completely from scratch. It didn't get very far. http://www.zachtronics.com/gibson/
I don't think anyone even knows how to build a mouse from scratch, and I'm not sure that itself is even a problem ..
Depends on how much of a scratch we're talking about. If you have access to ready-made parts, I'm pretty sure an electronics hobbyist can hack one together.
If we go down to zero, we're into material sciences, all the magic they do to silicon to give us chips and lasers and stuff - then yeah, there's no single person on earth who can do it all.
I'm tempted to say "@jeriellsworth can make chips from scratch by herself" but even she buys pre-purified silicon wafers, and so far she hasn't reached MSI as far as I know.
The witness: prepare to die edition
This is depressing.
I'd Google for the answer
How do you get to the UEFI shell on a Dell or Apple computer fresh from the factory? If you have the UEFI shell running, you can use the hexedit command, but then how do you run the code you've entered?
yeah? mm is the uefi shell modify-memory command, right? and is there a jmp command too? that would be adequate. overwriting a cmd isn't going to work if it's in flash, but maybe uefi is always shadowed in memory?
Does a hardware stack even exist that could enable such a thing? I imagine you’d be borked all the way down to the silicon. Maybe in a future where we could fab a custom cpu at home...
Coming in a few years thanks to @adolofsson's silicon compiler.
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