[VA] SRC #012a - Then and Now: Probability

[Vincent Weber]

I'm very impressed by the HP-71B (which I discovered too late) elegance and capabilities.

And all this without even user-defined functions or recursion. The only advanced concept in use is 2-dimensional arrays, which makes me think that this could be ported to any SHARP pocket above the 1211, the HP-41 with advantage module (or even without, emulating matrices with single arrays), or the HP-42S.

Except that... Memory requirements are huge. The needed registers seem in the range of 2.5*R^2 at bare minimum. For R=30 you need something like 18Kb if each register takes 8 bytes, plus extra variables, plus program stack... So you need something like 20Kb RAM. This rules out the 41, the 42, the SHARP pc-1261... You need a 32K machine basically!

Best regards