Not in direct answer to the question, but as an interesting aside, the conditions of space didn't allow for normal memory implementations in the Apollo missions back in the 60s. An alternative form, called core rope memory [1], used the placement of copper wire along a rope to encode ROM-style instructions into blocks of memory. This memory was literally woven by a team of older ladies for the purposes of use in the guidance systems. Great anecdote from the annals of comp sci history.

[1] https://en.wikipedia.org/wiki/Core_rope_memory