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**rprosperi** · 02-01-2016, 11:21 PM

(02-01-2016 04:45 PM)Don Shepherd Wrote:
(02-01-2016 03:24 PM)tomisan Wrote: My HP-27S with serial starting 2825 (week 25 1988) refuses. Just returns 0 as result. I have to make sure SEED <> 0 first.

That is interesting, I wouldn't have expected that. I used to have a 27S and played around with its solver a bit and it seemed to work exactly like the 17b/17bii, but I guess something must be different in it. I know the 27S has trig and random number functions while the 17b's do not.

Thanks for pointing that out.

Out of curiosity, I tried on my late 27S, s/n 3224S04180.

My exact solver equation is:
RAN=L(RAN:FP(9821xG(RAN)+.211327)) (Including the # as shown above would not work, bringing up an invalid equation error, seemingly due to the "#" being an invalid variable name character).

I get the same results as you (Don) posted, so it did work with the initial 0 SEED. I guess that bug in early 27S machines was eventually fixed.