On 27 Mar 2017, at 01:31, Noel Chiappa <jnc(a)mercury.lcs.mit.edu> wrote:
That style of subroutine call goes back a _long_ way. IIRC, Whirlwind used
that kind of linkage (alas, I've misplaced my copy of the Whirlwind
instruction manual, sigh - a real tresure).
This is how subroutines worked on EDSAC. It might go back further than this, but it
can't go back much further.