> Note that even the IBM 360 architecture wasn't really based on a hardware
> stack.  The common subroutine call instruction was BALR (branch and link
> register).  The return address was stuffed in a register.  At least that
> allowed recursion if the register was handled correctly.

Hey Olin, just curious: did you take Prof. Hollingsworth's IBM 360 assembly 
language course at RPI? I just realized you may have been in my class in 
Fall of 75.

-- Bob Ammerman
RAm Systems

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