The 702 had 2000-1000 characters of Williams tubes memory, the 705 could have 20,000, 40,000, or 80,000 characters in core memory.
If the dot was already drawn, the charge goes positive->positive, and there's no current induced in the metal plate.
But if that dot wasn't drawn (so it's a zero), it goes negative->positive, creating a current
The phosphors naturally fade to black, but there'd be dedicated circuits in the computer that do the refreshing of the tubes while the main CPU was doing other things.
(It's very similar to how DRAM controllers work today)
The Manchester Baby was a testbed to confirm confirm the tubes could be used for the Manchester Mark 1
Depending on the direction of the current, it'll flip to either clockwise or counterclockwise
Well, the same way you write it! You just set them to clockwise or counterclockwise.
If that coil was clockwise and you set it to counterclockwise, there'll be a small current in the sense wire.
If it was clockwise and you set it to counterclockwise, no current.
If it was a 1 and you wrote a 0, or vice versa, you just flipped it, and now you have to flip it back.
There's some woven textiles in Peru dated to 11,000-12,000 years ago.
So weaving is Quite Old, to say the least.
It didn't really start falling out of use until dynamic RAM got cheap enough to replace it, in 1970.
So that's 128 bytes, making it ALMOST enough to store this tweet (in 8-bit ASCII or UTF-8).
This tweet takes 225 bytes, or 1800 bits.
Apparently IBM wasn't planning to build a transistorized version of the 705, expecting the IBM 7070 to be the successor to the IBM 650 and 705, but it ended up not being compatible with either
Like there's this one of an IBM 704 mainframe at NACA in 1957, which is like "wow, that's a big computer!", and the operator in the foreground is loading punchcards into it.
So I was counting them twice.
But the same registers are involved.
"but foone, x86-64 isn't a segmented architecture! we haven't done that since what, the launch of the 386 in 1985?"
NOPE, THEY'RE STILL THERE!