#TIL In the Apollo Guidance Computer, register 7 is hardwired to zero, allowing one to zero out other registers, or to access the first element in the (base+offset) addressing mode.

I always thought the "$0 register" is a neat trick invented by MIPS. So this idea was actually much older...

@sir Yeah, I know this one, ARM also has it, so I mistakenly believed this was a RISC thing.

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