TI SR-50/51 AOS Possible?

[Dave Britten]

(04-15-2022 02:48 PM)Gene Wrote:  Well, one minor clarification (IMO) :-)

The implementation of AOS was likely ongoing, but the ** idea ** of AOS was to evaluate entered expressions using (fairly) standard hierarchy.

The SR-50/51 implemented the sum of products (M/D before A/S), which was a big improvement for algebraic models at the time, but it was the rather large AOS stack of the SR-52 and its descendants that allowed AOS to evaluate more than simple sum of products.

Now keeping track of what was stored in that AOS stack was not simple at all...but that's a different story and a big reason I much prefer an RPN stack of some sort.

What was the largest they ever made their AOS stack? I know the 58/59 have something like 8 pending values, but I don't recall what the 95 has off the top of my head.

My order of preference tends to be expression entry (with playback of at least the last entry, if not more), RPN, AOS. Though there are occasionally use cases where that order might change slightly.