HP50G on Emu48 :  5/0 gives infinity instead of infinity

12042019, 09:38 PM
Post: #1




HP50G on Emu48 :  5/0 gives infinity instead of infinity
On my real HP48 calculator, I used to set 22 flag on, and could get an answer to 5/0... a very large NEGATIVE "number".
I use now on my phone the HP50G version of the great Android application EMU48, but dividing with it a negative number by 0 gives "infinity" (i. e. something for me considered as positive according to the visual result) — but not infinity, as I expect. What is wrong in my doing (flag settings?) — with HP50GEmu48 — in order to get the correct sign answer? Thanks in advance for your clues. Regards, Gil 

12042019, 10:25 PM
Post: #2




RE: HP50G on Emu48 :  5/0 gives infinity instead of infinity
(12042019 09:38 PM)Gil Wrote: On my real HP48 calculator, I used to set 22 flag on, and could get an answer to 5/0... a very large NEGATIVE "number". Flag 105 must be set (Approx. mode on) to get the same behavior like on the HP48. 

12042019, 11:24 PM
Post: #3




RE: HP50G on Emu48 :  5/0 gives infinity instead of infinity
Actually understood the logic of the HP50G :
it does not know from which side from zero (tiny, but still negative, or just somewhat greater than zero and therfore poditive) I divide my number  5. In other words, 'infinite' might mean '+infinite' or 'infinite'. To get '+infinite' or 'infinite' values, I have to use 'infinite' EVAL. 

12052019, 05:15 AM
Post: #4




RE: HP50G on Emu48 :  5/0 gives infinity instead of infinity
I did not think about it.
I tried your solution setting flag  105 on and it worked perfectly : indeed 5/0 gives now, "directly", infinity. Thanks a lot. Gil 

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