comp.sys.hp48 Google Group

Re: Doubt on HP50G Intregation Result

jorge.po...@gmail.com (Jorge) — Fri, 08 Jan 2010 02:00:01 UT

As seen, this wonderful machine makes it to us thinking, not just
about the answer but the way to find it and this is very good for
having the brain "on shape".
Thank you very much for your time giving this answers.
Best regards;
Jorge Potes

Re: Doubt on HP50G Intregation Result

handuongs...@gmail.com (Han) — Fri, 08 Jan 2010 01:39:36 UT

I don't know how integration works for the HP50, but on the HP48, many
"basic" integrals are done using a method similar to using a look-up
table (via MATCH commands). Since the integrand is SIN(X), the
antiderivative is -COS(X). The output that you see is simply the
result of the Fundamental Theorem of Calculus. Using the Fundamental

Re: Hardware Debouncing on HP 50G RPN calculators

timwess...@gmail.com (TW) — Thu, 07 Jan 2010 22:13:40 UT

I think you mean software debouncing. I set mine at 0. Use the -
the CAT.
TW

Hardware Debouncing on HP 50G RPN calculators

staniga...@gmail.com (ssylee) — Thu, 07 Jan 2010 21:47:09 UT

I'm having a hard time making my key press count perhaps b/c of
hardware debouncing settings. However, I'm having a hard time finding
information on how to fix this problem. Does anyone know of an easy
way to fix it? Thanks.

Re: Doubt on HP50G Intregation Result

d...@larou.com (Dave Hayden) — Thu, 07 Jan 2010 20:44:17 UT

If you press EVAL, you'll get -(cos(1)-1), which is a little better.
You can get what you want by going to pressing MODE F3 and checking
"Incr Pow" to tell the CAS to display equations with the constant on
the left instead of the right. Now press OK twice to return to the
stack display and press EVAL to get 1-COS(X)

Re: Doubt on HP50G Intregation Result

jorge.po...@gmail.com (Jorge) — Thu, 07 Jan 2010 19:48:30 UT

Thanks for your clarifying answer. But the doubt on how HP50G gives
the output for the first case (even if mathematically correct -cos(1)
- - 1 is 1-cos(1)) remains. Just in how is made the output.

Re: Connecting the 48GX to a PC...

handuongs...@gmail.com (Han) — Thu, 07 Jan 2010 19:02:40 UT

I bought mine from Radio Shack, and it works with CONN4X, EMU48, and
Hyperterminal (the free one that comes with Windows). It also works
under Linux.
Han

Re: Connecting the 48GX to a PC...

davidbr...@gmail.com (Dave) — Thu, 07 Jan 2010 01:39:53 UT

There are a few manufacturers that make USB-to-serial adapters. Belkin
and Kensington come to mind. Conn4x is a bit fussy about certain
adapters, but I don't have any issues using Hyperterminal for Kermit
and X-Modem transfers with my 48GX.
-Dave Britten

Re: Doubt on HP50G Intregation Result

djpetro...@gmail.com (Daniel) — Thu, 07 Jan 2010 00:30:26 UT

That is correct. Confirm for yourself with Wolfram Alpha.
[link]
[link]

Doubt on HP50G Intregation Result

jorge.po...@gmail.com (Jorge) — Thu, 07 Jan 2010 00:19:50 UT

I would like to ask to you about this doubt I found "playing" a little
with my HP50G:
The Mode operating conditions are: ALG, STD, RAD, RECT. (Release 2.15)
Making the Integer Function in the "0" to "1" interval for SIN(X) dX,
the
result is:
"-COS(1)--1"
Making it in the interval from 0 to Pi the result is "2".

Re: Connecting the 48GX to a PC...

gorricho2...@gmail.com (Carlos Gorricho) — Wed, 06 Jan 2010 23:28:06 UT

Sorry for that...will try it again:
I bought my 48GX a long while ago. After college left it in a drawer.
Recently joined a distance learning course and will use it again. To
my surprise, only now I find out that Laptops do not come with serial
port connectors anymore...(the blue one for an external monitor is NOT

Connecting the 48GX to a PC...

gorricho2...@gmail.com (Carlos Gorricho) — Wed, 06 Jan 2010 23:22:34 UT

I bought my 48

Re: Any way to HALT from the keyboard? (48GX)

vir...@home.esc (Virgil) — Mon, 04 Jan 2010 21:24:15 UT

In article
<e3125002-6bbe-4345-ba3c-94370 a1cf...@b2g2000yqi.googlegroup s.com>,
If you put the 41 MENU before the HALT command, you will already be
ready to single step when the program halts.

Re: Any way to HALT from the keyboard? (48GX)

davidbr...@gmail.com (Dave) — Mon, 04 Jan 2010 19:55:31 UT

On Jan 4, 1:02 pm, Andreas Möller <andreas_moellerNOS...@gmx.de>
wrote:
Yeah, I'm sure the devil is in the details, as always. It's not
something I'd have the patience to tackle myself at this point.
Anyway, it's not a huge need, just something on my "Wouldn't it be
nice if..." list. I'll stick to programming directly on the 48 - it's

Re: Any way to HALT from the keyboard? (48GX)

andreas_moellernos...@gmx.de (Andreas Möller) — Mon, 04 Jan 2010 18:02:25 UT

Hello,
> Is it possible
> for a library to patch a built-in routine like that? I don't do
enough
> SysRPL to know.
It is possible to patch a built-in routine from the outside.
However, to my knowledge, the only software that patches built-in
routines for the 49G series are my Multi Lingual Packs. (If there are