## Re: [midatlanticretro] Re: Cheap Bit Banger's Calculator

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• ... I have a 28S as well. It was my daily driver for programming until about a month ago when one of its keys died. I haven t gotten around to attempting
Message 1 of 13 , Dec 6, 2012
On 12/06/2012 01:01 PM, Neil Cherry wrote:
> I still have my first HP, the HP28s (or c but I think it's the s).
> I won't let it go (though the battery compartment is broke, a common
> flaw on the 28). The 28 can do 'normal math' but RPN is so much easier

I have a 28S as well. It was my daily driver for programming until
about a month ago when one of its keys died. I haven't gotten around to
attempting repair yet. I was heartbroken; that's such a fantastic
calculator for programming use!

> That said, I always have my phone and my tablets around so I just use
> them with droid48 (x48). On my Linux box I have a command line version
> of a rpl calculator (based on the hp28). I downloaded it from
> comp.sources.misc and I've had it ever since (C portable code good!).

WHat's the name of that rpl command line calculator? I'd love to have
that.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
• ... ROFL! Yes I love my HPs for parallel resistance calculations. FAR easier and faster. ... My favorite all-around calculator for lab use is the HP-41, when
Message 2 of 13 , Dec 6, 2012
On 12/06/2012 11:44 AM, Kyle Owen wrote:
> However, it still wasn't until I was into my freshman year of college
> that I really saw the benefits of RPN. My absolute favorite
> demonstration is parallel resistance calculations. For most algebraic
> calculators, the method is 1/(1/a+1/b), where a and b are the two
> resistor values to be paralleled, and sometimes people even insert more
> parenthesis than need be. On the RPN, it's just a [inv] b [inv] + [inv].
> Far fewer keystrokes! One of my professors even made a joke (hardly a
> joke, really) that the students who finish first on exams must all have
> RPN calculators.

ROFL! Yes I love my HPs for parallel resistance calculations. FAR
easier and faster.

> Just recently I got an HP-48g to replace my 50g, which replaced the
> 49g+. The 50g is nice, but who needs all of those features for EE?
> Certainly not I. The buttons on the 48g are infinitely better anyways.

My favorite all-around calculator for lab use is the HP-41, when I'm
at my desk writing code it is (was, see other email) an HP-28S, and for
everything else I like the HP-48SX.

> One day, I'll own an HP-9100A...

Keep dreamin'.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
• ... It s called rpl, somehow I named it hp28 and I left it that way (it doesn t do everything the HP28 does and it s a little different than the hp48).
Message 3 of 13 , Dec 6, 2012
On 12/06/2012 01:03 PM, Dave McGuire wrote:
> On 12/06/2012 01:01 PM, Neil Cherry wrote:

> > That said, I always have my phone and my tablets around so I just use
> > them with droid48 (x48). On my Linux box I have a command line version
> > of a rpl calculator (based on the hp28). I downloaded it from
> > comp.sources.misc and I've had it ever since (C portable code good!).
>
> WHat's the name of that rpl command line calculator? I'd love to have
> that.

It's called rpl, somehow I named it hp28 and I left it that way (it doesn't
do everything the HP28 does and it's a little different than the hp48).

http://linuxha.com/athome/common/hp28-20121206.tgz

I have a ton of hp28 manuals (including this utility manuals written by a
3rd party). The scripting is nice and the fact that you can access the
OS from the calculator.

--
Linux Home Automation Neil Cherry ncherry@...
http://www.linuxha.com/ Main site
http://linuxha.blogspot.com/ My HA Blog
Author of: Linux Smart Homes For Dummies
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