|HP 35s keyboard weirdness|
Message #1 Posted by Hiawatha Wheelwright on 10 Jan 2010, 10:30 p.m.
I am a new owner of an HP-35s. I've skimmed over the list of known bugs, and believe I may have a bit more info on one of them.
There have been a handful of times when I have entered a calculation without looking at the screen, only to see a result that was egregiously large and obviously wrong. I assumed that this was the result of the known "dropped keystroke" bug, where occasional binary operations would be missed by the calculator.
But it just happened again and this time I saw what happened. I had entered a single digit, pressed +/- to change the sign, and then pressed the multiply key. The multiplication was not performed, and after a noticeable delay (maybe a bit less than one second) the digit "4" appeared next to the existing number.
x-register display keystroke
2 (32 now in Y) +/-
-24 (32 still in Y)
At this point, entering another digit bumped the -24 up into Y and the 32 into Z. Has anyone come across anything like this? Seems like very odd behaviour but I will certainly be keeping an eye open to see how this manifests again in the future. I am currently theorizing that the binary keys in the right column will under some circumstances be processed as the corresponding digit in the second column, but the fact that the next digit did a preceding push doesn't quite fit that. Almost as if the * got processed as a 4 followed by some sort of no-op.
Edited: 10 Jan 2010, 10:33 p.m.