RPN scientific calculator firmware for $13 calculator kit

10222019, 05:01 AM
Post: #16




RE: RPN scientific calculator firmware for $13 calculator kit
Hi, that is indeed the behavior of the calculator, but I'm not sure that that's a wrong result (free 42s gives the same result, starting from a stack filled with all 0s). After "8 enter 3 *" stack lift is reenabled. After swap, stack lift is still enabled, even though the display shows:
24 0 The zero in the x register isn't a result of CLx or some other stackdisabling operation, so when you hit 2, the stack "lifts" and you get: 0 2 I did just release a v1.06 which adds STO/RCL/LASTx, but I haven't uploaded a binary yet. I just realized that trying to take the square root of 0 will put the physical calculator into an infinite loop (can reset by holding shift and 0 to turn off, then release and press on to turn on again). I'll try to fix that bug and then upload a binary for v1.06 shortly. 

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