[cctalk] Re: Elliott Algol

[Paul Koning via cctalk]

> On Feb 19, 2025, at 4:08 PM, Gary Grebus via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
> On 2/17/25 12:30, Chuck Guzis via cctalk wrote:
> 
>> One of most ingenious coding tricks to me was the problem of saving and
>> restoring all registers without resorting to an exchange jump.  We used
>> that one as a test for applicants.
> 
> Argh... I know I've seen this trick, but it's been too many years.  How about 
> a hint?

Apart from the obvious memory store operation, a subroutine call (RJ 
instruction) does a memory write.

        paul