HDTenEightyP/NetNews huggingface dataset:
From: s2543587@techst02.technion.ac.IL (Amnon Govrin)
Subject: Re: Battery Saving/Screen Disabling?
Organization: UNCW news/mail gateway service
Date: Sun, 26 Jul 1992 07:27:35 GMT

I want it, so please E-mail me. ThanX in advance...
Amnon Govrin
From: akcs.joehorn@hpcvbbs.cv.hp.com (Joseph K. Horn)
Date: Sat, 25 Jul 1992 07:40:03 GMT
Subject: Re: hP48 is cracked open?!
Message-ID: <2a7102f2.1466.1comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48

morton@qucdntri.ee.queensu.ca [Stephen] writes:

> If I break my 48S open, will I find a port to which I could attatch
> cards?

NO!  Yikes!  Don't waste your poor 48S!  One of the reasons that the
48S costs a lot less than the 48SX is that the entire port connector &
related paraphernalia are missing.  The cheapest, fastest, and easiest
way to connect cards to a 48S is to sell it and buy a 48SX.  -jkh-
From: forbesm@atlantis.CS.ORST.EDU (Mark Forbes)
Newsgroups: comp.sys.hp48
Subject: Re: What non-HP cards work for RAM?
Date: 28 Jul 92 17:45:30 GMT
Article-I.D.: leela.1992Jul28.174530.13817
Organization: Computer Science Outreach Services - Oregon State University

akcs.levenson@hpcvbbs.cv.hp.com (william j. levenson) writes:

>Regarding the use of 512k RAM cards intended for the 95LX in the 48SX...
>I am not familiar with the 95LX but, the 48SX is limited by the
>addressable memory it can access.  In other words, the 48SX can only
[stuff deleted]

ARRRGGGGHHHH!!!

1) HP95 ram cards are *physically* different from HP48 ram cards. The
   only thing they have in common is memory and a 'flatness' characteristic.
2) The HP48SX can address 128K in each slot. Period. You can *fool* it by
   switching in different memory blocks in the same slot. If that memory is
   merged, then switched out, the machine barfs the next time it tries to
   look in that block.
3) There are off-spec Epson ram cards used in Smith Corona typewriters that
   are of the same physical form factor as HP48 RAM cards. They can sometimes
   be made to work in the 48. Sometimes they destroy the memory controller.
   *My* 48 doesn't take such risks for a few bucks.

Mark G. Forbes | forbesm@atlantis.cs.orst.edu
Corvallis, OR  | 503 757 8416 work phone    | Hardware R & D
From: akcs.levenson@hpcvbbs.cv.hp.com (william j. levenson)
Newsgroups: comp.sys.hp48
Subject: Re: another battery drainage question...
Date: 22 Jul 92 17:40:02 GMT

Hi all!

Regarding Joe Horn's response stating "never use I/R for printing, which
is like using the HP as a bulky penlight," I don't use a printer so I
don't really care but... I thought I read somewhere that the I/R port
actually uses less power than the serial port.  I think this was because
the I/R only draws power in short pulses (i.e.  when the "light" is
actually on) instead of the serial port, which draws significant power
continuously.  Does this relate to closing the I/O to conserve batteries?

I may be totally wrong about this but I thought I'd put it out there for
discussion.

See ya,

Bill
Newsgroups: comp.sys.hp48
From: ctt31684@uxa.cso.uiuc.edu (Ching Tai)
Subject: Re: battery failure in hp48sx
Organization: University of Illinois at Urbana
Date: Wed, 22 Jul 1992 07:53:40 GMT

>ochealth@unixg.ubc.ca (ochealth) writes:

>>Hey! I'm an EE. What do I look like? A chemist? Why should an EE know
>>how a battery works?

Because it's high school chemistry...

>>goddam CS types...

You might be offending a lot of people here.  I'm a CS major, but I DO
take a lot of EE classes for fun (and easy A's).  Face it, fabricating an
IC, designing stupid transistors, etc. is really part of CS.  (BTW, I've
taken all the EE classes all my EE friends have taken, plus my extra CS
courses.  So don't pick on CS poeple on their intelligence... maybe you
might score on their social life (yes, I play risk all day! so what))
and I love LISP.

-Ching


From: akcs.ssabsay@hpcvbbs.cv.hp.com (Scott Sabsay)
Date: Fri, 31 Jul 1992 03:40:02 GMT
Subject: goodies disk 5 or 6
Message-ID: <2a78abf0.1167.1comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48


Xref: sparky comp.sys.hp48:4056 comp.sys.hp:8640
From: arao@sdcc13.ucsd.edu (Andy Rao    )
Newsgroups: comp.sys.hp48,comp.sys.hp
Subject: HP e-mail address
Keywords: HP e-mail address
Date: 28 Jul 92 20:59:12 GMT
Article-I.D.: sdcc12.36246
Followup-To: poster

Does anybody know whether HP has an e-mail address that I can use
to get in contact with them???

-Anand Rao
Newsgroups: comp.sys.hp48
From: b645zjo@utarlg.uta.edu (Rick Homard)
Subject: Re: another battery drainage question...
NewsSoftware: VAX/VMS VNEWS 1.41    
    <TIM.92Jul24155209@nijinsky.ipac.caltech.edu>
Organization: The University of Texas at Arlington
NntpPostingHost: utarlg.uta.edu
MessageID: <25JUL199218532913@utarlg.uta.edu>
Date: Sat, 25 Jul 1992 23:53:00 GMT
X-Bytes: 672

In article <TIM.92Jul24155209@nijinsky.ipac.caltech.edu>, tim@nijinsky.ipac.caltech.edu (Tim Conrow) writes...
>Along these same lines, I get annoyed at having to wait that second or
>so while the `48 turns on, initializing or connecting lib.s, or
>whatever it's doing. When I'm using the `48 as a simple calculator
>(heaven forbid!) I want to hit the ON key and immediately be able to
>start typing numbers. So...
> 
> Tim                tim@ipac.caltech.edu


Is your time that precious that you cannot wait two seconds?

Either you:

(a)  have too many activities to do in one day and need to slow down, or
(b)  need to stop being so damned impatient.

:)

Rick Homard
From: akcs.nomad@hpcvbbs.cv.hp.com (Adam Cowen)
Date: Sat, 25 Jul 1992 19:40:02 GMT
Subject: Re: Fast User RPN mkstr (IR Remote)
Message-ID: <2a71a8f2.1479.2comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48

I have a smaller, and I think could be quicker way of doing the same
thing.

<< -> V
   <<  V R->B #4d
       BLANK ->STR 13 V SUB
   >>   
>>

This will give you approximately the size you need, but for even more
compactness try:

<< R->B #4d BLANK
  ->STR >>

The first program yeilds #FF01  71 bytes
the second yeilds #C7C1  38 bytes.

Now I am not sure if I made this myself, or it was someone elses idea, or
program since I have been using it for so long (I have a toshiba stereo,
so the other program is no good to me.)

I also had a program to redefine the keyboard by user input so that
someone could use normal keys, and not have to trade off their user
assignments for remote control purposes. It also was nice and user
friendly. But I trashed it. If anyone wants it I think I still have hte
source somewhere.

Adam Cowen
VP of HP CLub in Edmonton
Email: hpclub@ee.ualberta.ca

call our BBS at (403) 487-6947    (and thats Edmonton, Alberta, CANADA)

Newsgroups: comp.sys.hp48
From: morton@qucdntri.ee.queensu.ca
Subject: hP48 is cracked open?!
Organization: Queen's University EE Department
Date: Thu, 23 Jul 1992 18:28:59 GMT


The HP48S and HP48SX have very similar casings. Apart from the port opening on the SX, 
(and some minor aesthetic details), they are identical. This leads my friends and I 
to wonder...If I break my 48S open, will I find  a port to which I could attatch cards.
None of us has dared, lest we lose our $300 (CAN) investment. Some people in this group
seem to have been unafraid to do so: if you had 48S's rather than SX's, what did you 
folks discover?

			Stephen			Queen's Electrical Engineering
From: detlef@dmhh.hanse.de (Detlef Mueller)
Newsgroups: comp.sys.hp48
Subject: Re: another battery drainage question...
Date: 29 Jul 92 09:24:00 GMT
Organization: Who is Organized ?

b645zjo@utarlg.uta.edu writes in article <1992Jul21.212248.7806@utagraph.uta.edu>:
> [...]
> RAM card
> Typical battery current
> 128K  RAM   1.0 uA
>  32K  RAM   0.5 uA
> (Whan installed, cards draw power from HP48SX)
> Typical battery life 23 years.
                       ^^ :-), 'guess this should read as 2-3
> [...]
> 
> Rick Homard
> 

8-Detlef
--
+------------------------------------+--------------------------------------+
|`What a depressingly stupid machine'|             Detlef Mueller           |
| -- Marvin                          |          detlef@dmhh.hanse.de        |
+------------------------------------+--------------------------------------+
Newsgroups: comp.sys.hp48
From: tim@nijinsky.ipac.caltech.edu (Tim Conrow)
Subject: Re: another battery drainage question...
Organization: California Institute of Technology
	<2a6f84f9.1445.3comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Date: Fri, 24 Jul 1992 23:52:09 GMT

Along these same lines, I get annoyed at having to wait that second or
so while the `48 turns on, initializing or connecting lib.s, or
whatever it's doing. When I'm using the `48 as a simple calculator
(heaven forbid!) I want to hit the ON key and immediately be able to
start typing numbers. So...

How 'bout a STANDBY program that would reduce power usage by turning
off the LCD and then go into a low power wait-for-key-press mode. When
a key is pressed (any key) the `48 re-vivifies itself WITHOUT a cold
start. (Extra neato would be to then to perform the function of the
pressed key.)

Would this improve the uptake of the `48 and avoid lost key strokes
on power up? Anyone tried?

-- Tim                tim@ipac.caltech.edu

From: akcs.8378894@hpcvbbs.cv.hp.com (James Lee)
Date: Fri, 31 Jul 1992 13:40:01 GMT
Subject: Re: Re: Re: Security devices for exams (was something else...)
Message-ID: <2a793c2a.961.3comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48


From: akcs.mmorgan@hpcvbbs.cv.hp.com (Mike Morgan)
Date: Thu, 23 Jul 1992 06:40:03 GMT
Subject: Re: HP-48 BBS
Message-ID: <2a6e4be8.1459.1comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48

Is there a telnet address?

From: wille@hpcc01.corp.hp.com (Ross Wille)
Date: Fri, 24 Jul 1992 17:37:52 GMT
Subject: Adding Memory to 48S ?!?!?
Organization: the HP Corporate notes server
Newsgroups: comp.sys.hp48

Hi-

Can you add memory to the 48S by opening the case and putting the memory
inside where it would have gone had it been a 48SX?  I assume that the
connector inside the 48S is missing.  Perhaps the memory card could be
soldered in.  Maybe the guts of the 48S and 48SX are different (doubt it).

Would any of you who have opened up your calculators care to comment?

I looked back thru a year's worth of comp.sys.hp48 news and didn't see
this topic discussed, so I hope that it hasn't been beaten to death already.

Thanks,

-Ross

Hewlett Packard
Cupertino, CA
wille@cup.hp.com
Newsgroups: comp.sys.hp48
From: meissner@triton.unm.edu (John Meissner)
Subject: Serial Numbers.
Date: Fri, 24 Jul 92 23:28:24 GMT
Organization: University of New Mexico, Albuquerque
Distribution: usa

	As long as this thread is alive.  I have a question for someone
with HP.  What is the significance of the first four digits of the serial
number?  We have a lot of HP equipment and there seems to be a correlation
between the year of manumfature and the first two digits ( add 60 ).  If 
this is true then what are the next two digits?

	Thanks,

John Meissner

Newsgroups: comp.sys.hp48
From: slm@netrix.com (Shane L. MacPhillamy)
Subject: Unthreading library
Organization: Netrix Corporation
Distribution: US
Date: Tue, 28 Jul 1992 15:27:12 GMT

When I use voyager to unthread the EQ Library card, I seem to be only
able to find libraries 270, 272, 273, the other libraries listed by
the HP48 in the port menu as 271, 269, 268, 267, 266 don't seem to be
in any obvious place in the card.

Can somebody offer pointers as to how the HP48 finds these other libraries?

Thanks.

-Shane

-- 
Shane MacPhillamy
Netrix Corporation
13595 Dulles Technology Drive
Herndon Va 22071
From: hess@hpdmd48.boi.hp.com (Kevin Hess)
Date: Mon, 27 Jul 1992 23:01:29 GMT
Subject: Re: Serial Numbers.
Organization: Hewlett Packard - Boise, ID
Newsgroups: comp.sys.hp48

> 
> 	As long as this thread is alive.  I have a question for someone
> with HP.  What is the significance of the first four digits of the serial
> number?  We have a lot of HP equipment and there seems to be a correlation
> between the year of manumfature and the first two digits ( add 60 ).  If 
> this is true then what are the next two digits?
> 
> 	Thanks,
> 
> John Meissner

Dear John,

All instruments bearing an HP serial number have the date (approximately)
of manufacture encoded in the serial number.  As an example, consider the
serial number 2823S41139 (from the back of the keyboard I am responding
to this message with).

The first two digits indicate the year of manufacture *from 1960*. So:

	1960
	+ 28 (first 2 digits from serial number)
	----
	1988  --  the keyboard was manufactured in 1988

The next two digits indicate the *week* of the year it was manufactured. So:

	  23 indicates that it was manufactured in June (23rd week is in June)

The next letter indicates the *country* of manufacture. So:

	   S indicates Singapore

	   A is for North Ameriace
	   J for Japan
	   M for Mexico, etc.

The last 5 digits indicate the *sequence number* of manufacture. So:

	41139th keyboard manufactured.  

For high volume products (calculators, as an example) the serial number may be
reset on January 1 of each year.

Hope this helps.

-Kevin

This is not an official statement of The Hewlett-Packard Company. No war-
ranty is expressed or implied. The information included herein is not to be
construed as a committment on HP's part. 

"There can be only one!" - Conner McLeod of the clan McLeod
"I will not be pushed, filed, stamped, indexed, briefed, debriefed, or 
numbered - I am not a number, I am a free man!" - Number 6

Kevin C. Hess	 		The Hewlett-Packard Company
Network Printer Division	11311 Chinden Boulevard
Mail Stop 524			Boise, Idaho  83714-0015  USA
hess@hpbs917.boi.hp.com		(208) 323-3384
From: jeremy@jacobs.CS.ORST.EDU (Jeremy Smith)
Newsgroups: comp.sys.hp48
Subject: Re: HP-48 BBS
Date: 23 Jul 92 23:21:38 GMT
Article-I.D.: leela.1992Jul23.232138.17274
Organization: Computer Science Outreach Services - Oregon State University

In article <2a6e4be8.1459.1comp.sys.hp48.1@hpcvbbs.cv.hp.com> akcs.mmorgan@hpcvbbs.cv.hp.com (Mike Morgan) writes:
>Is there a telnet address?
>


telnet hpcvbbs.cv.hp.com

or

telnet 15.255.72.16


-- 
jeremy@jacobs.cs.orst.edu (Jeremy |-) Smith)
I'm sorry Dave, but I'm afraid I just can't do that... well, yes I can!
SGNTR VRS VRSN 3.1B: Strppd nd cmprssd fr qckr trnsmssn! nfct yrs tdy!
From: akcs.joehorn@hpcvbbs.cv.hp.com (Joseph K. Horn)
Date: Wed, 22 Jul 1992 03:40:02 GMT
Subject: Re: another battery drainage question...
Message-ID: <2a6cd054.1445.1comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48
Keywords: pointers

akcs.nomad@hpcvbbs.cv.hp.com [Adam Cowen] writes that changing a
directory's contents when it is also on the stack changes it on the
stack as well.  Then akcs.levenson@hpcvbbs.cv.hp.com [william j.
levenson] writes:

> I tried it and, sure enough, the stack object is changed.  Is this a
> bug?

No, it's a feature.  The old Owner's Manual wrongly states in the note
on the bottom of page 124: "If you recall a directory to the stack,
and then change that copy on the stack, the actual directory object
changes, as well."  This is, of course, 100% backwards; it's actually
the other way around, as is now correctly stated in the new Owner's
Manual on page 7-8: "If you recall a directory to the stack and then
change the directory contents, the copy on the stack will change as
well."

You can "turn off" this "feature" by doing a NEWOB on the directory on
the stack, which copies it to temporary memory, so that it no longer
points to the actual (named) directory.

> BTW, I have a Rev D; Does Rev E do this?

Yes; all HP 48 revisions do this.

-Joseph K. Horn-   -Peripheral Vision, Ltd.-
From: Michael_Hoppe@k2.maus.de (Michael Hoppe)
Newsgroups: comp.sys.hp48
Subject: OFF TOPIC?
Date: Sat, 25 Jul 92 11:01:00 GMT
Organization: MausNet
X-Gateway: MausGate/News 1.11

On monday, 7-13-92 Michael Hoppe asked:

MH>Is there a Global Positioning System (NAVSTAR/GPS) available for our
MH>beloved 48SX?  I know that there's a GPS-pac for the 95LX; but is there
MH>anybody who's working on such a system for the 48SX?
MH>
MH>Michael

On wednesday, 07-22-92, Michael Hoppe wrote:

MH>Does each HP48 own an individual serial number, which can be recalled via
MH>an ON-D keystroke?

No one answered his questions.  Is this because

     1.)  he was totally off topic;
     2.)  his questions are too hard to answer or simply because
     3.)  nobody read his messages?

Michael
From: akcs.joehorn@hpcvbbs.cv.hp.com (Joseph K. Horn)
Date: Fri, 24 Jul 1992 04:40:02 GMT
Subject: Re: another battery drainage question...
Message-ID: <2a6f84f9.1445.3comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48

akcs.levenson@hpcvbbs.cv.hp.com (william j. levenson) writes:

> Regarding Joe Horn's response stating "never use I/R for printing,
> which is like using the HP as a bulky penlight," I don't use a
> printer so I don't really care but... I thought I read somewhere
> that the I/R port actually uses less power than the serial port.  I
> think this was because the I/R only draws power in short pulses
> (i.e. when the "light" is actually on) instead of the serial port,
> which draws significant power continuously.  Does this relate to
> closing the I/O to conserve batteries?

Yes, the LED is pulsed, but that still sucks power.  If Doug Cannon's
measurements are accurate, IR printing is the worst battery drain.
Pertinent section follows:

----------------------------------------------------------------------
Current |       Operation                       |  Other
 ( mA ) |                                       |
--------| WIRE TRANSMISSIONS -------------------|---------------------
2.22    | idle, port closed                     |
3.22    | idle, port open! (connected)          | connected to a Mac
2.52    | idle, port open  (not connected)      |
8.15    | transferring to a mac                 | maximum
--------| IR TRANSMISSIONS ---------------------|---------------------
2.22    | idle, port closed                     |
3.22    | idle, port open (wire connected)      | figure this out!
2.52    | idle, port open (wire not connected)  | this one too.
7.2     | Transmitting, trying to connect       | not a real trans.
15.7    | Printing (no printer nearby)          | All time high!
----------------------------------------------------------------------

Doug specifies that no printer was nearby.  This wouldn't matter.

-Joseph K. Horn-   -Peripheral Vision, Ltd.-

Newsgroups: comp.sys.hp48
From: cloos@theory.TC.Cornell.EDU (James H. Cloos Jr.)
Subject: I'm back.  Sort of.
Organization: Cornell Information Technologies, Ithaca, NY 14853
Distribution: comp
Date: Sun, 26 Jul 1992 06:17:26 GMT

To everyone that has tried to send me email since April, I've been w/o
contact until just recently, and will be limited to just 1 or 2
connections per week for the next couple of months, but I *will*
receive anything you send.

More immediate stuff can be handled over the phone: +1 716 866-5249
and +1 716 673-1250.

I'll be in touch.

-JimC
--
James H. Cloos, Jr.		include <std/disclaimers.h>
Cloos@CrnlThry.BITNET           include <std/qotd>
Cloos@Theory.TC.Cornell.EDU	Phone:  +1 716 866-5249
cloos@batcomputer.UUCP		PersonalZipCode:  Amherst, NY  14226-1111

--
James H. Cloos, Jr.		include <std/disclaimers.h>
Cloos@CrnlThry.BITNET           include <std/qotd>
Cloos@Theory.TC.Cornell.EDU	Phone:  +1 716 866-5249
cloos@batcomputer.UUCP		PersonalZipCode:  Amherst, NY  14226-1111
From: akcs.joehorn@hpcvbbs.cv.hp.com (Joseph K. Horn)
Date: Fri, 31 Jul 1992 07:40:11 GMT
Subject: Re: SYSRCL ?
Message-ID: <2a78e8a0.1494.1comp.sys.hp48.1@hpcvbbs.cv.hp.com>
Newsgroups: comp.sys.hp48

dan@math.uiuc.edu (Daniel R. Grayson) writes:

> In tools.48 by Frank Ochoa, I find the function SYSRCL, but the
> documentation is missing.
>>     15. 'SYSRCL'    - Recall object to stack
>>     16. 'FIND'      - Find object in memory

Frank's SYSRCL takes only a Binary Integer as its input, and outputs
the object at that address.  Example: #1BB41h SYSRCL --> FACT.

FIND takes two arguments.  In level two is a Binary Integer consisting
of the hex digits to be searched for (1 to 16 digits), plus one final
digit representing how many digits are to be searched for, minus one.
That's confusing; here's an example.  Suppose we want to search for
the real numbers in ROM.  The real number header is 02933.  So we use
#29334 for FIND's level two argument, because leading zeros cannot be
typed, and the final "4" tells FIND that we're searching for *5*
digits.  The level one argument is a Binary Integer representing the
address where the search is to begin, minus one.  So if we want to
find the first real number AFTER address #20000h, use #20000h.
Example: #29334h #20000h FIND --> #29334 #22352.  SYSRCL --> 1200.
Then you can press LAST STACK, FIND, SYSRCL to see the next one, etc.

-Joseph K. Horn-   -Peripheral Vision, Ltd.-
From: Michael_Hoppe@k2.maus.de (Michael Hoppe)
Newsgroups: comp.sys.hp48
Subject: Serial No.
Date: Wed, 22 Jul 92 06:56:00 GMT
Organization: MausNet
X-Gateway: MausGate/News 1.11

Does each HP48 own an individual serial number, which can be recalled via an
ON-D keystroke?

Michael
Newsgroups: comp.sys.hp48
From: jpw@lorelei.ECE.Drexel.EDU (Joseph Wetstein)
Subject: hp48 OPTICAL BAR CODE READER
Organization: UNCW news/mail gateway service
Date: Wed, 29 Jul 1992 15:57:19 GMT


posting a message - take TWO!

Hi everyone,

A friend of mine is interested in information about BAR CODE READERS for

the hp48. I know there was one for the 41, and I'm sure that there is 

one for the 48. If anyone has any details, I would appreciate it if you 

could send me mail.

thanks,

Joe Wetstein
jpw@lorelei.ece.drexel.edu
Newsgroups: comp.sys.hp48
From: b645zjo@utarlg.uta.edu (Rick Homard)
Subject: Re: another battery drainage question...
NewsSoftware: VAX/VMS VNEWS 1.41    
Organization: The University of Texas at Arlington
NntpPostingHost: utarlg.uta.edu
MessageID: <21JUL199216220192@utarlg.uta.edu>
Date: Tue, 21 Jul 1992 21:22:00 GMT
X-Bytes: 1599

In article <1992Jul20.184424.12250@hubcap.clemson.edu>, jlysagh@hubcap.clemson.edu (james joseph lysaght) writes...
>I have a question for those of you who REALY know your HP in regards to
>power usage.  Does anybody know the trade off between turning the calc
>on and off repeatedly as opposed to leaving it on for a while.
>Specifically, does the calc use much power turning on?  Does the
>calulator use much power when on, but sitting idle?  Which power
>consumption rate is greater?  
>So, who wants to tackle this one?
> 
>Jim


This info is from Hewlett Packard in some literature comparing the HP48SX
and the HP28S:

Battery Current:

 Operating

Worst case                             80 mA (milliamps)
Typical HP48SX                          8 mA
Typical HP48SX and 1 RAM card           9 mA
Typical HP48SX and Serial I/O          10 mA
Typical HP48SX and infrared printing   18 mA


 Idle

Worst case                             20 mA
Typical HP48SX                         3.5 mA
Typical HP48SX and 1 RAM card          4.5 mA
Typical HP48SX and I/O port open       6.0 mA

 Off

Worst Case                             50 uA (microamps)
Typical HP48SX                         11 uA


Typical battery life is 6 months.



RAM card
Typical battery current
128K  RAM   1.0 uA
 32K  RAM   0.5 uA
(Whan installed, cards draw power from HP48SX)
Typical battery life 23 years.




I don't have info regarding the poweron current draw.  I would assume 
this would be greater than the idle current draw initially  (obvious).

You can draw your own conclusions from the data above.  


Rick Homard

Newsgroups: comp.sys.hp48