More HP 33S algebraic bugs? Try these.. Message #1 Posted by Matt Kernal (US) on 12 May 2004, 8:08 p.m.
Inspired by Gene's findings in his post "HP33S question:POLL  Try this in algebraic mode", I found a few more strange results on my S/N: CNA4100... 33S.
** WARNING ** The following key sequences involve CLEARING your 33S's memory. Only those who DON'T CARE IF THEY LOSE THEIR CALCULATOR'S CONTENTS should try these steps **
1. Switch to algebraic mode, and make sure the stack/display is clear by pressing the <C> (ON) key.
2. Using Gene's number, press: 24 then press the Minus key.
3. Your display should have "24" in the top line and "24.00" (assuming FIX 2) in the bottom line.
4. Now clear the calulator's memory by pressing the green <leftshift> key, followed by the <clx> key (you know, the <backspace> key just below TAN). Using the big "wobble" key, navigate to: 3ALL, and press <ENTER>. At the "CLR ALL? Y N" prompt, navigate to "Y" and press <ENTER>
5. Finally, press: 24 then press the ADD key. What do you see? On my calculator, the top line is "24+" and the bottom line is "24.00". What's up with that?!?
Here's another one:
1. Do step 1 above.
2. Using Gene's number, press: 24 then press the Divide key.
3. Your display should have "24/" (/ is the divide symbol) in the top line and "24.00" (assuming FIX 2) in the bottom line.
4. Do step 4 above.
5. Finally, press: 24 then press the Divide key (or the Multiply or Minus or Plus key). What do you see? On my calculator, the top line is "0/" and the bottom line is "0.00". BTW, if you had pressed the any of the other keys (Multiply, Minus, or Plus), the top line would be "0x", "0", or "0+", respectively, and the bottom line is "0.00").
I know these are really, really obscure key sequences, but aren't these bugs? I wonder if the original Walmart units are the same/different?
Matt
