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HP Forum Archive 14

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Complex Square Root on 33s
Message #1 Posted by Bill P on 10 May 2004, 1:15 a.m.

On comp.sys.hp48 lately, several people have been complaining about the absence of a direct complex square root function on the HP 33s. Here is my solution:

G0001 LBL G
G0002 0
G0003 0.5
G0004 CMPLXy^x
G0005 RTN

This puts the complex square root on the calc as an effective extra command for the SQRT(x) key. This may be useful if the command is needed often.

      
HP 33s Keypad
Message #2 Posted by René Stäbler on 10 May 2004, 11:11 a.m.,
in response to message #1 by Bill P

I'm an old 41cv user and used to an excellent key-pad - has anyone already experienced the type / feeling of the 33s keys? thanks in advance, rene

            
Re: It is not working (input is ex:2x+3=6)
Message #3 Posted by Veli-Pekka Nousiainen on 10 May 2004, 1:27 p.m.,
in response to message #2 by René Stäbler

33s key feedback is better than in my 42S and 32SII. I like it. 
Coloring or the general shape is another issue. 48G colors are worse IMO
{VPN} AXL
      
Re: Complex Square Root on 33s
Message #4 Posted by Karl Schneider on 11 May 2004, 2:13 a.m.,
in response to message #1 by Bill P

Bill --

In fact, I was just reviewing this today. Your program is the logical work-around.

I believe that the complex-number capability of the 33S (and of its ancestral 32SII/32S models) was based upon the routines provided in the HP-41C Math Pac. This ROM also lacked direct complex-argument support for x^2, sqrt, hyperbolics, and inverse trigs. "Z^N", "Z^1/N", and "Z^W" could be used for the first two, but the others would require a bit of work.

Among the RPN models, only the 15C and 42S have complete complex-number support.

            
Re: Complex Square Root on 33s
Message #5 Posted by Ángel Martin on 11 May 2004, 7:08 a.m.,
in response to message #4 by Karl Schneider

A small correction: now also the 41 has a full support of complex functions, and even more complete than those mentioned (15C and 42S).

See the HP-41Z ROM available on the web's other site. Just a few days ago I uploaded the last revision, with source code available as well.

Best, ÁM.

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