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ThomasF · (This post was last modified: 04-28-2021 05:54 PM by ThomasF.)

(04-28-2021 01:26 PM)rprosperi Wrote: Is RAM intact? Are values stored in the stack and storage registers preserved when doing various operations?

Hi Bob!

Yes, as far as I can test, all RAM seems ok (all 9 + 6 registers and the stack)

I've gone through some examples from the manual, and I can see that statistical functions work fine, register arithmetics etc also.
The things that doesn't seems to work are:

ASIN, ACOS, SINH, TANH,
s (standard deviation),
L.R. (and prediction),
and also Q and Q-1 fails.

I.e. "0.1361 Q" should result in "0.6615" but gives "0.5000".
"0.5 Q-1" gives "0.0000" (ok)
"5 Q-1" gives "Error 0" (ok)
"0 Q-1" gives "-9.999999 99" (ok)
"0.25 Q-1" gives after some seconds with a balnk screen "0.0000" (should be "-0.6745")
and last example: "0.01 Q-1" gives after several seconds with a "running-program-blinking-display" "Error 0", but should be "-2.3263"

So, it is really strange - and I'm more and more convinced that something is wrong inside the ROM.

Cheers,
Thomas