HDTenEightyP/NetNews huggingface dataset:
From: rseymour@reed.edu (Robert Seymour)
Newsgroups: comp.sys.hp48
Subject: 48SX and Differential Equations
Date: 10 Oct 92 17:19:00 GMT
Article-I.D.: reed.1992Oct10.171900.17372
Reply-To: rseymour@reed.edu
Organization: Reed College, Portland, OR


	To what extent can a 48SX deal with differential equations? I would  
like to be able to solve differential equations symbollically with a 48SX, but  
are there cards out there that can do it? If so, how much are they and how good  
are they at dealing with all type of differentials [seperable eqns; first  
order; second order; homogenous/inhomogenous; benoulli equations; exact  
differentials; partial differentials; etc.]?

--
Robert Seymour				rseymour@reed.edu
Departments of Physics and Philosophy
Artificial Life Project			Reed College
Reed Solar Energy Project		Portland, OR
Newsgroups: comp.sys.hp48
From: kskalb@immd1.informatik.uni-erlangen.de (Klaus Kalb)
Subject: Re: Help with strings wanted!
Organization: CSD., University of Erlangen
Distribution: usa
Date: Mon, 12 Oct 1992 09:43:52 GMT
Keywords: string command line

danc@unixg.ubc.ca (Dan Ciarniello) writes:

>|> No need to resort to numbers. C$ $ ... will copy the enrire rest
>|> of the commandline into the string. RTFM.

>>Excuse me, but I don't recall anything about C$ in the old FM.  I learned
>>about C$ from this group.  Is it in the new manual?  If so, I (and probably
>>many others) wouldn't know about it since we haven't any reason to buy
>>the new FM (What can I get from the new FM that I haven't already 
>>picked up from this group?).  RTFM seems somewhat harsh in this case.

Note that the F refers to the manual and not to the poser of the question.
I just wanted to say that it is in the manual. I tend to ignore questions
that are too easily solved by manual lookup. This one didn't fall into
this category.

I remember rumours about a better manual, but I don't know if there
is really a new and improved official manual out there.

IMHO a good reference manual like that one from James Donelly serves
better than a bulky manual that assumes that you never had any
exposure to RPN. The latter one might be good for newbies, but if you
have had an HP41 for ten years after upgrading to an HP48 you
are forced to read a lot before getting to the beef.

>>PS  If info about C$ does appear in th OFM feel free to correct me.
>Well,  I'm somewhat shamefaced and I'll save Klaus the trouble of 
>flaming me.
>I was wrong, the C$ is in the OFM (shows you how closely I read it
>the first few times).  

I remember reading about C$ in the OFM. I know for sure that I read
about it, since I couldn't figure out why this C$-feature was needed.
Now I know...
 
>I tender my humble apologies to Klaus.

I would never flame anybody for not being able to find it in those
manuals, since these things are hard to find in there. And nobody
can't remember all features of the HP48.

BTW: Since I never saw a german manual (I always try to avoid translated
manuals since translations tend to make things worse)
Are they just translations of the american ones ? 

-KK
---
------------------------------------------------------------------------------
    Klaus Kalb     | mail :  IMMD1 / Martenstr. 3 / W-8520 Erlangen / Germany 
 Werch ein Illtum  | email:  kskalb@immd1.informatik.uni-erlangen.de   
------------------------------------------------------------------------------
Newsgroups: comp.sys.hp48
From: henko@ppvku.ericsson.se (Henrik Koberstein(PPL),0000,000000)
Subject: I/O with Sys-Rpl
Keywords: I/O, Sys-Rpl
Reply-To: henko@ppvku.ericsson.se
Organization: Ericsson Programatic Sweden AB
Date: Thu, 8 Oct 1992 11:23:20 GMT


Hello Sys-Rpl gurus!

I'm interrested in doing I/O operations within a Sys-Rpl program. The ENTRIES.A
file contains a numner of words to do it. But nothing is mentioned in RPLMAN.DOC.

Does someone out there ever used these words? Want to share your knowledge to a 
Sys-rpl beginner?

Thanx in advance!

  /Henrik
From: january@tsugo.engin.umich.edu (Kyu Jung Kim)
Subject: HP48SX-E FOR SALE
Date: Sun, 11 Oct 92 20:03:02 EDT
Organization: University of Michigan Engineering, Ann Arbor
Originator: january@tsugo.engin.umich.edu


===== HP48SX Rev. E for sale =====

- HP48SX Rev. E & manuals
- Equation Library Card & manual
- Homemade Serial Cable for IBM PC
- Mint condition

    Asking $250 for all, not sold separately
    Contact Kim via E-mail january@caen.engin.umich.edu  
Newsgroups: comp.sys.hp48
From: Erik Naggum <enag@ifi.uio.no>
Date: 08 Oct 1992 03:23:45 +0100
Subject: Re: Serial Number determination

Rob Windsor <windsor@matt.ksu.ksu.edu> writes:
|
|   ME:   365</>                          CALC:    1:    # 1994d
|
|   The date across the top says "10/07/92".  What gives?

A year isn't 365 days long, of course.  It's 365.242198781 days long.
You can find this by converting 1_yr to d in the UNITS TIME menu.  (It's
probably shifted a little (!) since this value was exact (?), but it's a
common enough value.)

TICKS 8192 / 86400 / B\->R 1_d * 1_yr CONV should give you
1992.77083105_yr.  At least it's the right year.  FP 1_d CONV and you
get 281.540027591_d.  Further, 1_d / 1 - 1.01 SWAP DATE+ should give you
10.081992 (or 8.101992 if you DD.MMYYYY notation).  That's today!

(The fraction indicates how far the mean sidereal year is from the mean
solar year, if I got this astronomy thing right.)

Best regards,
</Erik>
--
Erik Naggum             :  ISO  8879 SGML     :      +47 295 0313
                        :  ISO 10744 HyTime   :
<erik@naggum.no>        :  ISO 10646 UCS      :      Memento, terrigena.
<enag@ifi.uio.no>       :  ISO  9899 C        :      Memento, vita brevis.
Newsgroups: comp.sys.hp48
From: ins534z@aurora.cc.monash.edu.au (Quetzal)
Subject: Re: User Buttons ON/OFF?
Organization: Monash University
X-Newsreader: TIN [version 1.1 PL6]
Date: Mon, 12 Oct 1992 02:37:14 GMT

Patrick Ryan (sauron@femto.engr.mun.ca) wrote:
: Is there any way to turn off the LCD button definitions from within a
: program?  I've written a timetable display, but the bottom 1/6th gets
: lost.  Any suggestions would be appreciated!
: 
I haven't got the manual with me right now, but look up the FREEZE command.

If you have written a program to make the timetable as a GROB then used \->LCD
to display it, include (I think) 7 FREEZE as the last instructions in the
program and the display will freeze until you press any button.
If, on the other hand, you are building the picture in PICT and are viewing it
by pressing GRAPH, then your best solution is to press [orange] [GRAPH] to
enter scrolling mode, which makes the menu area disappear.

Tim Pickett

Newsgroups: comp.sys.hp48
From: mueller@schaefer.math.wisc.edu (Carl Douglas Mueller)
Newsgroups: comp.sys.hp48
Subject: Re: plotting (sin(x))^2 + (cos(x))^2
Date: 15 Oct 92 21:25:44 GMT
Reply-To: mueller@schaefer.UUCP (Carl Douglas Mueller)
Organization: Univ. of Wisconsin Dept. of Mathematics

In article <15OCT199212390010@utrcv1> wcr@utrcv1 (William C. Rogers) writes:
>Hello,
>
>     Can someone tell me why I can't plot (sin(x))^2 + (cos(x))^2 from
>x = 0 to Pi on my HP48S. I know the result is 1 but the HP48 doesn't 
>seem to know that.

 How are you doing it?  I just plotted the function (PROGRAM)

 << X SIN SQ Y COS SQ + >>

 and my HP-48SX knew it was 1.

>
>                       Thanks
>                       Bill 

Carl Mueller (mueller@math.wisc.edu)
From: cs90fat@sdcc8.ucsd.edu (Anand Rao)
Newsgroups: comp.sys.hp48
Subject: 3-D graphics
Date: 11 Oct 92 18:30:19 GMT

does anybody know if i can use my hp48sx to display 3-D graphics?
(ie plot equations of 2 variables like f(x,y))  

i looked in the manual and they don't seem to mention it ever.
is there some sort of software i can get either public domain
or not, or is there a card i can buy that will let me do this?
thanks a lot...

-anand

From: akcs.levenson@hpcvbbs.cv.hp.com (william j. levenson)
Date: Wed, 14 Oct 1992 23:40:02 GMT
Subject: Re: temporary halt?
Message-ID: <2adca231.1925.1comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48
Keywords: Halt

Ben:

Five seconds sounds a bit long but otherwise, it sounds like garbage
collection.  This happens occasionally (more often if your memory is low)
so that the HP can recover unused memory.  It doesn't happen using TETRIS
because the meory management is taken care of in the program or it is
done at planned times when it won't be noticeable.  If you execute MEM,
garbage collection is done prior to reporting how much memory is
available.  This is described somewhere in the manuals, I believe.

Hope this helps,

Bill Levenson
From: kraai4712@iscsvax.uni.edu
Newsgroups: comp.sys.hp48
Subject: Re: More powerful transmitter?
Date: 9 Oct 92 15:19:59 -0500
Organization: University of Northern Iowa

tp923021@jarrah.canberra.edu.au (Ben Elliston) writes:
>I noticed that two HP-48sx's require that for infrared file transfers,
>etc., the transmit and receive 'bulbs' need to be _touching_ to be able
>to transfer reliably.
 
Could one of your leds possibly be misaligned -- a cross-eyed hp48 as it were?
--------------------------------------------------------------------------
jim kraai, undergrad, university northern iowa, kraai4712@iscsvax.uni.edu
--------------------------------------------------------------------------
All opinions are my own, but are | Your eyes are weary from staring at the
   hereby released to the public | CRT.  You feel sleepy.  Notice how
   domain for the furtherance of | restful it is to watch the cursor blink
      common sense and a general | Close your eyes.  The opinions stated
          improvement of dinner- | above are yours.  You cannot imagine
             party conversation. | why you ever felt otherwise.

Newsgroups: comp.sys.hp48
From: grant@bluemoon.rn.com (Grant DeLorean)
Subject: Re: Coupons...
Organization: Blue Moon
Date: Thu, 15 Oct 92 20:42:13 GMT

st901745@pip.cc.brandeis.edu (Alastair M. Bor) writes:

>Sorry if this is in a FAQ... but my girlfriend is interested in
>getting a calculator.. I showed her the HP48SX and she was impressed.
>She decided to buy one... and as I was looking through the trusty old
>EDUCALC catalog I noticed that the coupons that you get expire on
>October 31, 1992. I would like to know what these coupons are for. If they
>are indeed usefull I will ask her to get the calculator as soon as
>possible before Oct. 31, else it doesn't matter if she waits till 
>Christmas. Also, do the coupons expire on the 31st or you must simply
>buy the calculator before the 31st.

 You have to buy before October 31st and mail by Noveber 10th.
-- 
\   Grant DeLorean  - IHMSA & NRA Life Member -  (grant@bluemoon.use.com)   /

        Good leaders being scarce, following yourself is allowed.

Newsgroups: comp.sys.hp48
From: ins534z@aurora.cc.monash.edu.au (Quetzal)
Subject: Re: Serial Number??
Organization: Monash University
X-Newsreader: TIN [version 1.1 PL6]
Date: Fri, 9 Oct 1992 03:52:26 GMT

: Actually, a little known fact about the HP48 is that under the HEWLETT
: PACKARD label in the upper left hand corner is a small optical scanner
: attached to the calc by a fibre optic.  All that is needed is the 
: appropriate SYSEVAL.  Apparently this (as of yet unknown) SYSEVAL will
: cause rubber feet to lift the calc off the table (or whatever it's 
: sitting on) and the optical eye will snake out of its hiding place and
: scan the serial number engraved on the back of the calc.  :-) :-)

I take it, then, that the HP48S, with the logo just painted on, does
not have this feature . . . :-)

Tim Pickett
Newsgroups: comp.sys.hp48
Keywords: programming books, hp48

lepard@mayo.edu [Kevin O. Lepard] writes:

> Is anyone familiar with _The_HP_48_Handbook_ by James Donnelly?
> (Page 61 of the current educalc catalog.)  I am thinking about
> getting a book on programming the 48SX and that sounds pretty good.
> Does anyone have any comments on that or any other programming
> books? (Neglect the HP 48 Programmer's Reference Manual by HP.)

It's more a reference manual for those who don't want to haul around
the Owner's Manual.  The section about programming is only 12 pages
long, and the pages are small and the type is big.  Great reference
for the error messages, menu numbers, character map, object types, and
all that sort of thing, however.

Much more in-depth is Bill Wickes' book "HP 48 Insights", especially
Volume I.  Chapter 9, "Programming", plus Chapter 12, "Program
Development", totals 101 pages, and the pages are big and the type is
small.  Highly recommended.

"An Easy Course in Using the HP-48SX" by Coffin, Coffin, and Loux is a
deceptive title.  It's not just a teething book for intellectual
infants.  Chapter 6, "Building Your Own Tools: Programming" is 41
pages of good material, including an excellent tutorial about the
principles of program design, like: delineate the desired inputs and
outputs before you write any code; set your strategy; break up the
task into workable pieces; etc.  Don't let the cutesy-pie cartoons
fool you; this book is not a comic book for mental midgets.  It even
has a Quiz at the end of the chapter, and that's followed by complete
answers and explanations for each.

-Joseph K. Horn-   -Peripheral Vision, Ltd.-
akcs.joehorn@hpcvbbs.cv.hp.com
Disclaimer: I don't work for HP, EduCALC, or anybody else.

Newsgroups: comp.sys.hp48
From: Erik Naggum <enag@ifi.uio.no>
Date: 10 Oct 1992 01:31:06 +0100
Subject: Re: Serial Number determination

Mike Burr <mnb@voodoo.boeing.com> writes:
|
|   Wait a minute!  If this is true, then my HP must be living in the
|   past...  I only get # 503623063 from ticks.  That works out to 61477
|   secs... or about 17 hrs.  Gee, if my calculator is correct, I can go
|   to Jerusalem and change Christs' diapers :^).  What gives here?

(MATH BASE) RCWS gives you 32, right?  It needs to be at least 49 to get
the complete number.

If you EDIT the number you get, with either [DOWN] or EDIT, you'll see
the whole thing.

Best regards,
</Erik>
--
Erik Naggum             :  ISO  8879 SGML     :      +47 295 0313
                        :  ISO 10744 HyTime   :
<erik@naggum.no>        :  ISO 10646 UCS      :      Memento, terrigena.
<enag@ifi.uio.no>       :  ISO  9899 C        :      Memento, vita brevis.
From: akcs.rsanders@hpcvbbs.cv.hp.com (Robert Sanders)
Date: Thu, 8 Oct 1992 00:40:03 GMT
Subject: Re: Syseval to check rx pin state?
Message-ID: <2ad37e4a.1862.1comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48
Keywords: syseval serial i/o port

Well, Paul, I'm not sure what sort of "overhead" you mean, except maybe
typing...

I don't remember any such SYSEVAL, and I don't think there is one (of
course, I will be wrong).  Let me tell you why:  A syseval that checks
the RX pin would probably do something like
     if RX pin is high, return TRUE
     else return FALSE
And what's the most logical way to do that? Maching language, of course!

Since any serial driver type stuff would want to fast, dropping into
ML (from SYSRPL) to check the pin, pushing the T/F flag onto the stack,
returning to RPL, executing the next instruction (which would probably
drop into ML) etc. would be rather, well, silly.  And, while the ROM
routines are occasionally odd, they're almost never silly.
 
You wouldn't have much use for this sort of thing anyway, unless
you have some sort of external device that just holds the RX pin high
to signal you of something (and this would munge the ROM serial stuff
anyway).  If you're concerned about high speed serial communication,
anything you do from USER or SYSTEM RPL would be competing with the
normal, interrupt driven serial-service routines.  The way to better
performance is to, in your idiom, incur some of that ML overhead 
(mainly because this is the only to shut off the interrupts).
 
Oh. wait. I always speak before I check, so don't trust me.  CLOSEIO
from USER RPL  (or CLOSEUART and its cousins from SYSTEm RPL) might
inhibit the part of the interrupt routine concerned with the serial
port.
Joe Ervin was nice enough to send me his absolutely BEAUTIFUL interrupt
routine disassembly (and commentary), so I could check this for you.
 
Tell us, what do you want to check the RX pin for?

Robert
pshuprs@prism.gatech.edu

Newsgroups: comp.sys.hp48
From: fokp@bray1b.its.rpi.edu (Pingtao (Ben) Fok)
Subject: temporary halt?
Keywords: Halt
Reply-To: fokp@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.
Date: Wed, 14 Oct 1992 01:44:07 GMT

I don't if anybody has been expriencing this before but I have been
expriencing this unwanted halt ever seens I bought my calculator.

What happen is when I am doing something say copying a stack, the 
calculator would halt for about 5 seconds and go back to normal.
Also, when I am running a program, it halt in the same way.
But the interesting thing is such halt doesn't happen to the tetris
game.  I wonder why.
Ben fok
fokp@rpi.edu


Newsgroups: comp.sys.hp48
From: david@garfield.catt.ncsu.edu (David Chappell)
Subject: Contents of HP 48SX Package
Organization: Computer and Technologies Theme Program, NCSU, Raleigh
Date: Tue, 13 Oct 1992 04:59:51 GMT

What is supposed to come with an HP 48SX in the store package?  I bought one
today and was surpised to find Volume II of the Ownder's Manual but no
Volume I.  I got the reference manual, but nothing I got tells simple things
like how to turn it on/off an dhow to use RPN.  (I can figure out these, but
there are other basics that need to be explained to a novice.)  Was there
anything else I was supposed to get?

If I was supposed to get Volume I, can I do so without returning the calc?
I bought the last one at the store, so I'd like to easily get the book.  I
am a Stanford student, so I can even go to HP hq here, but I doubt that they
could help.

Also, what about the free goodies for students that come with calculators
bought this month.  From what I've sen in news ads and read on this newsgroup,
I should have gotten a coupon book.  How do I get that or my freebies?
Thanks, dave
+++++++++++++++++++++++++++++++++++
     David T. Chappell            --   david@catt.ncsu.edu
North Carolina State University   --   Computer And Technologies Theme Program
-----------------------------------
From: wcr@utrcv1 (William C. Rogers)
Newsgroups: comp.sys.hp48
Subject: plotting (sin(x))^2 + (cos(x))^2
Date: 15 Oct 92 17:39:00 GMT
Organization: United Technologies Research Center
News-Software: VAX/VMS VNEWS 1.41

Hello,

     Can someone tell me why I can't plot (sin(x))^2 + (cos(x))^2 from
x = 0 to Pi on my HP48S. I know the result is 1 but the HP48 doesn't 
seem to know that.

                       Thanks
                       Bill
From: Borel@elsrfm.epfl.ch (Borel Philippe)
Newsgroups: comp.sys.hp48
Subject: Making a LIB from an RPL program
Date: 13 Oct 92 09:08:54 GMT
Followup-To: comp.sys.hp48
Organization: Ecole Polytechnique Federale de Lausanne

Hi!

I'm not a library wizard so I don't know if it's possible to
create a LIB with an <<external code>> or RPL program.
If yes, which tools are needed ?
There are some very useful programs that would be even better
to use if they were in a library.

Thanx
From: fokp@lib111.its.rpi.edu (Pingtao (Ben) Fok)
Newsgroups: comp.sys.hp48
Subject: getting program from Unix
Date: 15 Oct 92 01:38:36 GMT
Article-I.D.: rpi.ll2zffa
Reply-To: fokp@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.

does anybody know how to transfer program from Unix to Macintosh.
I have some program for HP48sx on my Unix account and the only way
I can transfer them is through Kermit.  I can send program but I don't 
know how to recieve the program I sent.
Thanks
From: akcs.joehorn@hpcvbbs.cv.hp.com (Joseph K. Horn)
Date: Tue, 13 Oct 1992 06:40:02 GMT
Subject: Re: speeding up the 48SX
Message-ID: <2ada6912.1876.1comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48

"Why is the graphing on the HP 48 so sloowww?"

On page 2 of the PLOTR menu, see the RES softkey?  Type #2 and press RES
to speed up your function plots by a factor of 2, which should make your
races against friendly competition more equitable.  Or try #3 if you want
to beat them.  Or #4 to blow them into the weeds.

The HP is slower for several reasons.  For one, it has no fixed display
memory, but allows you to create HUGE graphic screens (try #256d DUP
BLANK PICT STO before graphing a function!) which can then be scrolled
around or printed all at once.

-Joseph K. Horn-   -Peripheral Vision, Ltd.-
akcs.joehorn@hpcvbbs.cv.hp.com
Disclaimer: I don't work for HP, EduCALC, or anybody else.
Newsgroups: comp.sys.hp48
From: slg@postman.hsn.no (SIMON LINDGREN)
Subject: Symbolical Integration
Organization: Nordland College
Date: Wed, 14 Oct 1992 12:48:59 GMT

	I'm sadly unimpressed by the default integration-feature in my HP48sx

Numerically, it always comes up with the right answer, but I really could 
use some symbolical integrations (And how do I integrate without 
inserting the limits, which always produce numerical answers??)
	
	Is there a card to do the job, or what?

From: akcs.n2kyw@hpcvbbs.cv.hp.com (Paul Smith)
Date: Mon, 12 Oct 1992 04:40:02 GMT
Subject: Re: Syseval to check rx pin state?
Message-ID: <2ad8f9ec.1862.4comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48
Keywords: syseval serial i/o port

Thanks, Bob, for your help on the ML access to the RX pin.
It'll be a while before I can digest it and regurgitate something
applicable, but now I've got a good start.

Paul Smith, smit3223@nova.gmi.edu
From: kraai4712@iscsvax.uni.edu
Newsgroups: comp.sys.hp48
Subject: Non-Integer Units (was: possible bug in HP48SX Version E UNITS)
Date: 15 Oct 92 12:01:39 -0500
Organization: University of Northern Iowa

Philosophical tangent from this recurring thread.

Do units with non-integer exponents have meaning?  

Maybe if this was discussed by someone who knows about the topic in
a casual, clear manner, this wouldn't come up every few months.

I thought I saw some reference to this non-bug in the FAQ?
Could someone who knows something please comment on this?
From: gt8134b@prism.gatech.EDU (Howlin' Bob)
Newsgroups: comp.sys.hp48
Subject: Re: question about hex(?) numbers !
Date: 16 Oct 92 14:51:10 GMT
Organization: Georgia Institute of Technology


This has come up twice so far, so everyone is being pleasingly
innovative..

however, the key sequence
    ON-D
    Backspace
    ENTER
    any number 0-7

does NOT turn the HP48 off or "lock" it!

"ON-D BACKSPACE" puts you into the memory scanner, while ENTER seems to be
be a convenience feature that puts the scanner at address #100.
When you type a number [0-9][A-F] you enter that nibble into the current
location.  Any nibble < 8 clears the high bit of location of address #100,
turning the display off, but LEAVING THE CALCULATOR ON.  So, it seems
locked but is secretly feasting on your batteries.  Sorry.

DON'T DO THIS!  Two nice programs, Gateway and Codelock (both on Goodies
disk #7, I think) do a much more thorough job.

By the way, ON-C will take you out of the memory scanner.

Robert

-- 
Howlin' Bob
Georgia Institute of Technology, Atlanta Georgia, 30332
uucp:	  ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gt8134b
Internet: gt8134b@prism.gatech.edu
Newsgroups: comp.sys.hp48