And Win64 in rcx, rdx, r8, and r9. Having originally learned the basics of assembly on the chronically register-deprived x86, it took me a while to get used to

And Win64 in rcx, rdx, r8, and r9. Having originally learned the basics of assembly on the chronically register-deprived x86, it took me a while to get used to the fact that standard CCs now pass things in registers (and rsi and rdi in particular, retaining their ancient names while being completely general-purpose these days).