HP-11C and complex numbers « Next Oldest | Next Newest »

 ▼ Antlab Junior Member Posts: 8 Threads: 2 Joined: Jun 2013 06-27-2013, 05:02 PM Hi all. In this period I am exploring the interesting world of the calculator emulators, in particular for my new Android phone. It is fascinating being able to retrace decades of development with the various models. In these days I found a nice HP-11C emulator for Android, and I am trying to discover the main differences respect to the 15C, that I know a bit better. I also downloaded the original manual, but I still have a doubt, concerning the handling of complex numbers. I see that the 11C, as the bigger sister, has the (i) and I functions, (over the COS and TAN keys), but I did not understand their use, because it seems that it doesn't have a Commplex Mode as in the 15C. Could you please clarify this issue? Thanks. ▼ Marcus von Cube, Germany Posting Freak Posts: 3,283 Threads: 104 Joined: Jul 2005 06-28-2013, 02:53 AM The 11C does not do complex arithmetic. I and (i) are used for indirect addressing exclusively. ▼ Katie Wasserman Posting Freak Posts: 1,477 Threads: 71 Joined: Jan 2005 06-28-2013, 03:11 AM Register I is also used for loop control. Thomas Klemm Senior Member Posts: 735 Threads: 34 Joined: May 2007 06-28-2013, 03:15 AM Both ISG and DSE work only with register I. Cheers Thomas Torsten Junior Member Posts: 23 Threads: 3 Joined: Aug 2010 06-28-2013, 05:52 AM Have a look on the compare features function on this site: HP-11C vs. HP-15C ▼ Antlab Junior Member Posts: 8 Threads: 2 Joined: Jun 2013 06-28-2013, 08:59 AM Thanks to all for the fast answers, now I understand better the differences between the two models concerning complex numbers, and will try to study the question of indirect addressing with (i) and I.

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