HP Forum Archive 17

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arithmetic used in the HP 50g Message #1 Posted by Arne Halvorsen (Norway) on 26 Sept 2007, 9:49 a.m. Seing me getting back to working with hp calculators recalled a lot of (happy I think) memories by my boss, a mathematician. He recalled he had an hp-28c somewhere and asked me recently: --> One of the reasons I bought the HP 28c, so many years ago now, was that HP were one of the first implementers of the IEEE floating point standard, and at that time I was doing some work that involved the standard. It would be interesting to know or get any publications that describe the arithmetic used in the HP 50g. If you see or know of links to any such publications please let me know. <-- Background is company just ordered a hp-50g. Being one of the programmers here I will get to spend some quality time with it :-) But not for a while (I am getting into the habit of waiting for hp calcs) since it turns out the HP-50g is not selling in Norway yet because manual not translated yet! I think most customer of it would be quite happy with english manual... Perhaps someone here know anything about this topic of my manager's question? (before any goes totaly RTFM on me; specs I have seen does not give such details and the manual links on hp.com are dead now(!) and done some googling)

Re: arithmetic used in the HP 50g Message #2 Posted by Thomas Okken on 26 Sept 2007, 10:42 a.m., in response to message #1 by Arne Halvorsen (Norway) I just tried the links at hp.com and I could download the HP-50g user's guide and the manual with no problem. (Don't worry, this is not an RTFM -- I don't know the answer to you question about HP-50g arithmetic, but I thought it was worth mentioning that the manuals are still available on-line.) - Thomas

Re: arithmetic used in the HP 50g Message #3 Posted by Arne Halvorsen (Norway) on 26 Sept 2007, 10:51 a.m., in response to message #2 by Thomas Okken Thanks, it must be my problem somehow then! I am ofcourse interested in downloading the manuals since it seems I will be using the machine at some point in the near future. BUT : I get to this place: http://h20000.www2.hp.com/service/site/404/Bsc404_en.html whenever trying those links! I am banned or something! Edited: 26 Sept 2007, 10:58 a.m.

Re: arithmetic used in the HP 50g Message #4 Posted by Thomas Okken on 26 Sept 2007, 11:06 a.m., in response to message #3 by Arne Halvorsen (Norway) Did you try going via the link in my post? Since I downloaded both files already anyway, I'd be happy to send them to you via yousendit.com. Just send me an email if you're interested. - Thomas

Re: arithmetic used in the HP 50g Message #5 Posted by Arne Halvorsen (Norway) on 26 Sept 2007, 11:19 a.m., in response to message #4 by Thomas Okken Yes I did use your link! And the page I got to had the manual links in a color telling I had clicket on them before, so pretty sure those are the links I have being trying. Only explenation I can think of is one branch from where one visit page... But find it very strange! I think I send you an email!

Re: arithmetic used in the HP 50g Message #6 Posted by Giancarlo (Italy) on 26 Sept 2007, 11:21 a.m., in response to message #3 by Arne Halvorsen (Norway) Hi Arne. Have you tried the "ever-green" Hpcalc.org ? "Of course" there you can find: Advanced User's Reference Manual and HP50G User's Manual You can try to get the manuals from the Educalc site as well: Educalc Manual Page Hope this helps. Best regards. Giancarlo

Re: arithmetic used in the HP 50g Message #7 Posted by Arne Halvorsen (Norway) on 26 Sept 2007, 11:29 a.m., in response to message #6 by Giancarlo (Italy) Thanks! Got the manuals now! Had missed that could get from there!

Re: arithmetic used in the HP 50g Message #8 Posted by Pal G. on 26 Sept 2007, 12:08 p.m., in response to message #7 by Arne Halvorsen (Norway) While you are waiting for your hardware, have you thought about downloading a nice hp 50g emulator? You can download the manuals and start using an hp 50g (emulated) today.. http://www.educalc.net/881486.page ;) Pal

Re: arithmetic used in the HP 50g Message #9 Posted by Eric Smith on 26 Sept 2007, 2:46 p.m., in response to message #1 by Arne Halvorsen (Norway) Quote: One of the reasons I bought the HP 28c, so many years ago now, was that HP were one of the first implementers of the IEEE floating point standard, and at that time I was doing some work that involved the standard. The HP-71B was the only HP calculator that used IEEE floating point, and it used IEEE 854 radix-independent floating point rather than the more common IEEE 754 binary floating point. The Saturn-based calculators, including the 28C, used arithmetic code derived from that of the 71B, but did not provide full IEEE 854 compliance. Quote: It would be interesting to know or get any publications that describe the arithmetic used in the HP 50g. I think the 50g still uses the Saturn arithmetic code derived from the 71B, but I haven't dug into it enough to know it for a fact. The 49g+ and 50g did move some low level functions from Saturn code to native ARM code, but I haven't heard of that being done to the floating point arithmetic.

Re: arithmetic used in the HP 50g Message #10 Posted by Arne Halvorsen (Norway) on 27 Sept 2007, 4:14 a.m., in response to message #9 by Eric Smith From my manager :-): Thanks, very helpful.

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