Tbf there was also a 32kb hard drive involved as well iirc.
And as far as pure computational calculations that’s plenty. Even the space shuttle before it retired ran on a 486 processor. We take computational speeds and capacities for granted today because we expect pretty interfaces and multi tasking but when push comes to shove you don’t need a lot if you focus on strict priorities.
It was magnetic rope memory. No transistors. Many expert weavers had to weave the cores by hand. This is a video about it https://youtu.be/dI-JW2UIAG0
..Skip to 3 min
To interact with the software they had to use long rolls of paper with punch outs if I remember right. They had to go through the entire thing after each flight which took days and find little issues with the trajectory and everything. Was tedious work but was cutting edge for them at the time, to have the computer record and make corrections make system checks on it's own and stuff.
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