HDTenEightyP/NetNews huggingface dataset:
From: strange@zk3.dec.com (Steve Strange)
Subject: Re: 25MHz IIsi and my engineering friend
Organization: Digital Equipment Corp.
Date: 15 Nov 92 11:48:32

In article <1992Nov15.121708.24693@news.acns.nwu.edu> eepmatt@casbah.acns.nwu.edu (Matthew Friedman) writes:

   1. (The Biggie First) He said that increasing the clockspeed of a machine
   should _NOT_ increase heat in a microprocessor if that chip is designed to
   handle the increase. He said that an increase in heat would _only_ occur if
   there were capacitances in the chip, or "wires" that were too close to each
   other to handle the increased frequency and "energy" was jumping from one to
   another. He said it was too difficult to explain why an increase in clockspeed
   would not cause an increase in heat ina properly designed chip. (My being a
   film major did not make things easier for him!)

This is incorrect.  A CMOS chip *will* generate more heat if run at a
high clock rate.  CMOS transistors only draw significant power when
they are are switching from one state to another (i.e. from logical
"1" to "0" or back again).  If you increase the rate at which these
transitions take place, more power will be drawn.  That power has to
go somewhere -- it all ends up going to heat.  If the chip is run at a
high enough frequency that it gets hot enough to damage itself, it
needs a heat sink.  All the heat sink does is reduce the temperature
at which an equilibrium is reached between the generation of heat in
the chip and the radiation of heat from the chip and heat sink.

   So, if this is true, the increase in heat would seem to be an
   indication that the microprocessor is _NOT_ suitable for higher speeds.

As long as the heat sink keeps the operating temperature low enough,
the higher speed is not a problem.  Unless, of course, the chip
doesn't logically function properly due to propagation delays in the
chip or, much more likely, in the wires leading to and from the chip.

   2. The only damage this procedure could do, he said, would be through the
   increased heat. So attaching a heat sink would make it safe. All the other
   problems he said would be data errors, and could be fixed by swapping back
   to the original clockspeed.

I agree totally with this.

   3. He told me it is a common practice in ibm's to upgrade to a higher
   clockspeed simply by swapping to a new microprocessor (apparently theirs
   include their own timing crystals.) This would suggest
   that the rest of the machine is safe from physical damage, even if an apple
   is not an ibm.

Sounds reasonable to me.


	Steve

--
+---------------------------------------------------------------------------+
|   Steve Strange            |   Opinions expressed are my own and not      |
|   Digital Equipment Corp.  |   necessarily those of my employer, or       |
|   Nashua, NH 03062-2698    |   of anyone else, for that matter.           |
|   strange@zk3.dec.com      |                                              |
+---------------------------------------------------------------------------+
Newsgroups: comp.sys.mac.hardware
From: parkyn@fraser.sfu.ca (Dale Parkyn)
Subject: Re: How long should I charge my PB batter?
Organization: Simon Fraser University, Burnaby, B.C., Canada
Date: Thu, 19 Nov 1992 00:01:05 GMT

Danny W. McCampbell <danny@utkux1.utk.edu> writes:
>adapter to my PB, should I disconnect the AC adapter
>when the chooser's Battery shows that the batter is charged?
>Can I safely leave the AC adapter hooked to the PB so 
>I can use the batter for later?  Help, I do not want to tear
>any thing up.

Danny! Relax! There have been several good explanations of why 
there is little need to worry about the PowerBook battery. I will
locate one and post it to you via e-mail.

I have my PowerBook connected to AC nearly all the time as I use it
as my main computer. As recommended in the manual, run the battery down
until the PB shuts itself off, about once a month for me.

Ignore the 'experts' who claim to know about 'memory effects' damaging
battery... DO NOT drain the battery, by any method, more than the 
normal PB self-shut-off point. I have seen that done and excessive 
discharge ruined the battery, would NOT begin to recharge.

Just use it, leave it connected if you are not worried about power line
voltage spikes, and run the battery flat as per manual recommendation.

(ASIDE
  I keep my computers plugged in to AC all the time. One day lightning 
struck the power pole nearest the apartment building. THREE transformers
needed to be replaced on the poles. NO electrical equipment in my apartment
or any other apartments were damaged! However, the elevator would not
restart...
END ASIDE

DALE
	
parkyn@sfu.ca
From: calypso@stein.u.washington.edu (Kent Shih)
Newsgroups: comp.sys.mac.hardware
Subject: Dying Se/30's HD
Date: 16 Nov 92 16:55:02 GMT
Article-I.D.: u.1992Nov16.165502.4981
Organization: University of Washington


     Help!  Recently my SE/30 does not recognize its internal HD.  This HD
     is a quantum drive, a replacement for the old Sony drive.  Sometimes
     the whole computer just freezes and I cannot reboot 'cuz HD is not
     recognized, I get a sad face and the string is:

                 0000000F
                 00000003

     Does anyone know the problem?

     Another question is, I initialized the HD, so right now the HD is
     COMPLETELY empty.  And when I try to boot the computer with my floppy
     disk, it would check the HD first before floppy, and then gives me a
     sad face... Now I cannot even use my computer!  HEEEEEEELLLLLLLLLP!!!!
     How can I make the computer to check the internal floppy drive first
     before checking its Internal HD(now empty)?

     Do you guys think I should get a new HD?
Newsgroups: comp.sys.mac.hardware
From: Eric Oberle <eoberle@leland.stanford.edu>
Subject: Powerbook DUO Memory
X-Xxmessage-Id: <A733EDE8E20200C3@rains-b16e-fastpath-dynamic.stanford.edu>
X-Xxdate: Sat, 21 Nov 92 21:45:12 GMT
Organization: Stanford University
X-Useragent: Nuntius v1.1.1d12
Date: Sat, 21 Nov 92 21:43:59 GMT

Hello:	

I have a few questions about the memory in the new Powerbook Duos:

Does anyone know what kind of memory simms one can put in a Powerbook duo
240?  Are these available now?  
What are the configurations of Simms that one can put in a Duo?  
What set of Simms comes in a machine with 4mb?

Thanks for your help

Eric Oberle
Newsgroups: comp.sys.mac.hardware
Distribution: world
From: Douglas_J._Kiang@fourd.com
Organization: 4th Dimension BBS
Date: Fri, 20 Nov 1992 00:21:47 EST
Subject: Re: How long should I charge my PB batter?

<<When I charge my Powerbook Battery by hooking up the AC
adapter to my PB, should I disconnect the AC adapter
when the chooser's Battery shows that the batter is charged?
Can I safely leave the AC adapter hooked to the PB so 
I can use the batter for later?  Help, I do not want to tear
any thing up.>>

Danny,

You can leave the PowerBook plugged in as long as you want. It will not
overheat, and the battery will not overcharge. 

There are only a few things you should watch out for: if you are going to be
away from your PowerBook for an extended period of time (more than a few
weeks) or if you will be shipping it, you should disconnect the AC adapter and
(on a PB100) flip the storage switch on the back panel to the down position,
which will completely disconnect the battery and keep it from draining. A
special caution is that if the PB100 battery (sealed lead-acid type) drains
completely, you may not be able to recharge it.

Never run the PowerBook off AC power when the battery is not in the compartment.  Do not leave the AC adapter plugged into the PowerBook when it is disconnected from the outlet, as this
will quickly drain your battery (even if the computer is off.)

Hope these tips help. If you have any other related questions, don't hesitate to ask.

--Doug
********************************************************************
System: fourd.com                                Phone: 617-494-0565
Cute quote:  Being a computer means never having to say you're sorry
********************************************************************
From: long@mcntsh.enet.dec.com (Rich Long)
Newsgroups: comp.sys.mac.hardware
Subject: Orange Micro's 2/3/486 boards?
Date: 23 Nov 92 22:22:37 GMT
Organization: Digital Equipment Corporation


 For various reasons, I'm considering an Orange Micro PC board for my IIci. If
 anyone has one of these, I'd love to hear your impressions of it. I'm
 thinking about perhaps running an 80x86 Unix, or  DOS/Windows. Are there any
 compatibility issues with these on an Orange Micro board? Would it make more
 sense for me to invest in an accellerator for the IIci and buy SoftPC? 

 Last but not least, do you have an e-mail address for Orange Micro?

 Thanks, as always,
 Rich

+-----------------------------------------------------------------------------+
Richard C. Long		                  | long@mcntsh.enet.dec.com
          "Ludicrous speed!! GO!!!!"      | ...!decwrl!mcntsh.enet.dec.com!long
                      -- Dark Helmet      | long%mcntsh.dec@decwrl.enet.dec.com
Newsgroups: comp.sys.mac.hardware
From: lester@naomi.b23b.ingr.com (Les Bartel)
Subject: Trackball info for MacPlus wanted
Reply-To: lester@naomi.b23b.ingr.com
Organization: Intergraph Corporation
Date: Fri, 20 Nov 1992 14:57:52 GMT

My wife is is getting frustrated with the mouse on our MacPlus, so I
am investigating the possibility of replacing it with a trackball.
What are the pros and cons of the various trackballs on the market?
I will need the non-adb version.

 - les

-- 
Les Bartel			lester@naomi.b23b.ingr.com
Intergraph Corporation		Huntsville, AL
Electronics Division		(205) 730-8537

To the cat, the experimenter is problematic.
Newsgroups: comp.sys.mac.hardware
From: 93kwt@williams.edu (K Wayne Thomas)
Subject: Mac SE to HP IIP -- Help!
Organization: Williams College, Williamstown, MA
Distribution: na
Date: Fri, 20 Nov 1992 20:28:45 GMT


I'm currently using a software program (plus a cable!) called JetLink
Express to connect an SE to the serial port of an HP IIP -- the
problem is that this is Soooo incredibly slow that I might as well
convert my documents to msdos and print them from windows...

Does anyone know of a better solution, using hardware or software,
that will speed this up a little {advice on SE accelerator boards
included, of course (: }? It would be sorely appreciated, as many
people in the office where this is set up just don't like the idea of
going near the IBMs (I'm sure some of you understand).

Thanks,

K.Wayne.Thomas@williams.edu
LEAD@igc.org


Newsgroups: comp.sys.mac.hardware
From: patlin_s@cubldr.colorado.edu
Subject: Re: HOW DO I rename a hard disk????????
Organization: University of Colorado, Boulder
Distribution: na
Date: Fri, 20 Nov 1992 21:11:46 GMT

In article <1992Nov20.150036.29587@news2.cis.umn.edu>, Patrick Parker <pharmacy@epx.cis.umn.edu> writes:
> In article <kq4guB1w165w@bluemoon.use.com> djredick@bluemoon.use.com (Darrin J.
> Redick) writes:
>>cwheeler@alsvid.une.edu.au (AlphaPrime) writes:
>>
>>> I have a Mac Classic II running system 7.1. I can't rename the hard disk.
>>> So far I have made sure the File sharing was off and made sure that no
> networ
>>> funtions are on.
>>> What do I do.
>>
>>Well, offhand, what _I_ would do is take the pointer, click on the name
>>of the hard drive, and type the new name.  I believe that is how it is
>>done.
> 
> I think he's aware that this used to be the way it worked, but is asking how to
> do it now that System 7 has changed things.  I don't know how many other people
> experience this problem, but I can't change my HD names without a utility
> either... and no I don't have sharing on, nor any applications running, etc. 
> Basically, I use DiskTools to rename the hard drive.  Also, I know if you mount
> with System 6 you can change the name.  I'm curious as to why it's become a
> problem to rename hard drives.  Maybe this is a _feature_ of System 7 so as to
> make it harder for non-welcome users from changing configurations.. who knows.

Hmm.  Just out of curiousity, I reached over and tried to do it the "old"
way on my IIci (which I'm currently connecting to the net with.)

Worked absolutely normally for me under tuned up system 7.

Scott.
From: WIS@LIVERPOOL.AC.UK
Newsgroups: comp.sys.mac.hardware
Subject: PC Emulation Cards
Date: 18 Nov 92 12:43:51 GMT
Organization: University of Liverpool

Does anyone out there in netland know why PC Emulation cards are so
expensive for the mac? The only one I know of is by Orange Micro and
last time I looked it was over $1000.

This seems an exorbitant price since I can get an eqivalent 386sx
motherboard for around $100 and I can can get an industrial PC on
an S100 card for around $300. PC emulator cards for Atari STs
(68000 based, no expansion ports, so these clip over the processor)
start at $100 for a 8088 and finish at about $400 for a 386sx.

At these sort of prices (less than the cost of SoftPC) there would
surely be a market (I'd buy one!) Otherwise if I want PC compatibility
I might as well buy a cheap notebook PC and keep it next to my mac.

Any comments (or even better, have I got my facts wrong: is there an
affordable card out there - NuBus or PDS)

Bill Sellers (wis@uxb.liv.ac.uk)
Newsgroups: comp.sys.mac.hardware
From: isr@rodan.acs.syr.edu (Michael S. Schechter - ISR group account)
Subject: Re: Re: Lifetime of 25MHz IIsi (was: 25MHz IIsi and my engineering friend)
Organization: Syracuse University, Syracuse, NY
Date: Fri, 20 Nov 92 11:45:02 EST

In article <71610003@hpl-opus.hpl.hp.com> blalock@hpl-opus.hpl.hp.com (Travis Blalock) writes:
>In comp.sys.mac.hardware, blalock@hpl-otis.hpl.hp.com (Travis Blalock) writes:
>> In comp.sys.mac.hardware, isr@rodan.acs.syr.edu (Michael S. Schechter - ISR group account) writes:
>> > they'll be more voltrage drop, and the CPU will draw still more amperage,
>> Ack!  Less voltage --> lower current
>Clarification:  Some folks don't understand why I am referring to this
>situation as less voltage.  The power supply voltage is fixed.  More voltage
>drop on the PC board trace between the supply and the CPU chip means there is
>less voltage across the CPU chip.  If the CPU has less voltage across
>it, it will draw less current.

Oh well, as the original "heat" poster, I see my point needs
more clarification.. Travis, you clearly understand device charecteristics
but there's still the BIG picture  that you and several others haven't
"gotten" yet.

I was referring to the traces sucking up more power.. 
as their temperature goes up, their resistance goes up, and their fraction
of voltage goes up meaning more voltage drop across them, meaning
more power consumed, meaning more heat, and more resistance, then
it starts over again...

eventually they'll be little pockets of copper vapor exploding outwads
from the inner layers, sending shards of boards all over the inside of
computer. And when THAT happens, well, I don't think it'll be very
good for the power supply if say, a peice of motherboard lands across
two relatively hot pins/traces..

And as far as the chip goes, well, if the section of board that explodes
happens to lie in the vicinity of the 030, what kind of mechanical stress
will that put on the ceramic? Yes, that chip may very well be shock-rated
to 200G's, but is it bend-rated? how fault-tolerant is it, anyway?
is there a ratng for how many internalcracks it may develop before
failure?

So, the BIG picture is...
Some people are worried about EVERYTHING. tell 'em that heat sinks
keep things from getting HOT, and they worry abouyt long-term effects,
tell 'em about that they worry about something else. it's always something.
  
So, ya might as well tell 'em that their si'll explode in their face,
since none of 'em will ever do anything BUT worry. Since now they've

go ahead y'all, flame me now, while ya gots the chance.

flames to: Mike_Schecter@isr.syr.edu     
really hot flames to: isr@mailbox.syr.edu  (So we can pass it around)
complaints to: postmaster@isr.syr.edu      (oh-oh!)






Newsgroups: comp.sys.mac.hardware
From: rariss@wx.gtegsc.com (Rushdi A. Ariss)
Subject: Connecting Mac to Epson Printer
Summary: How can it be done?
Keywords: Printers
Organization: GTE Govt Sys, IIPO, Weather Sys Engr
Date: Thu, 19 Nov 1992 00:11:19 GMT


	I have an Epson printer, and a Mac SE.  I'd like to use them 
together.   Does anyone have info on how this is done, if even possible.  

	Do I have to buy some hardware, or is there software on the net that 
I can use.  Any assistance would be appreciated.

	Many thanks!


	Rushdi A. Ariss
	rariss@wx.gtegsc.com

	Save Bandwidth:  send email  :)
From: ma168faf@imath8.ucsd.edu (Matthew Guarnotta)
Newsgroups: comp.sys.mac.hardware
Subject: ***TELEVSION AS WINDOW*****HELP
Date: 19 Nov 92 04:23:11 GMT
Organization: Univsersity of California, San Diego
From: tsa@cellar.org (The Silent Assassin)
Newsgroups: comp.sys.mac.hardware
Subject: LC to VGA
Date: 17 Nov 92 21:57:43 GMT
Organization: The Cellar BBS and public access system

WHen hooking an LC up to a VGA monitor, what kind of VGA monitor do you
need?  The LC is the only Mac that can hook up to a non-multiscan VGA
monitor, right?  I can make the cable easy, and you are supposed to get
640x480 with 16 or 256 colors, depending on VRAM.  So will any 640x480 VGA
monitor do?  I've seen 'em for like 220$.


Disclaimer: none. /earth is 98% full, please delete anyone you can.
tsa@cellar.org | weeks quote:"  Whenever 'A' attempts by law to impose his
moral standards on 'B', 'A' is most likely a scoundrel"-H.L. Mencken
"Mispelled?  Impossible!  I have an error-correcting modem."
From: ranjank@eniac.seas.upenn.edu (Ranjan Khan)
Newsgroups: comp.sys.mac.hardware
Subject: MAC IIsi REDUCED!!!
Date: 17 Nov 92 23:32:12 GMT
Organization: University of Pennsylvania

Mac IIsi (68030) 20MHz
=  5 Mb Ram
=  1.44 Mb Drive
=  80 Mb HD
=  Built in Video Card
=  Expansion Slot
=  System Sowtware 7.0

Apple Macintosh 12" Monochrome Display

Apple Macintosh Keyboard II  Desktop Bus

Software
=  Anti-Virus
=  Disinfectant 2.9
=  Filters
=  Games
=  Help Files
=  Hypercard
=  Mac Basics
=  MacPaint
=  MacWrite II
=  Microsoft Excel
=  Microsoft Word
=  Teach Text
=  Typestyler
=  Utilities
=  Webster's College Thesaurus
=  WriteNow 2.2

I bought this top of the line Mac brand new last December.  This excellent 
system is only 11 months old.  I need to sell it quick in order to buy a new 
Gateway 2000 and switch over to IBM.  Nothing's wrong with Macintosh, but as 
an Electrical Engineer, I realize an IBM is much more preferrable.

$1900 O.B.O.!!!  (215) 573-7832   ranjank@eniac.seas.upenn.edu
If you still don't liek the price, drop me an offer!
-Ranjan
Newsgroups: comp.sys.mac.hardware
From: trimble@ph-meter.beckman.uiuc.edu (Chris Trimble)
Subject: Re: Farewell to the Mac? (not flame)
Organization: University of Illinois at Urbana
Date: Wed, 18 Nov 1992 18:56:19 GMT

model03@kuhub.cc.ukans.edu (John Deke) writes:

>	Do you think the Mac will be phased out?

  Apple will probably try to keep the CISCs alive for the first couple of
  years after PowerPC, but I highly doubt it will last. People will quickly
  realize the benefits of the PowerPC and jump in instead of buying CISCs.
  If Apple wants to win over its customers, they should offer an upgrade
  path from the CISCs, which, unlike the IIcx/i -> Quadra upgrade would be
  REASONABLY PRICED. 

  Furthermore, Apple does to the Mac owners what they've done to
  Apple // owners about 5 times as often. Every 6 months Apple outdates
  the models of 6 months ago. Just look at the line right now! Why should
  anyone buy a Quadra 700 with the 800 coming out in January? Why should
  anyone buy a IIvx with the Centris (whatever) coming out in January?
  This kind of anticipation game is what has kept me from buying a Mac for
  so long.

>	Is this good or not?

  No. It isn't. I think Apple should try to build a line that can stand
  the test of time as well as your //e (and mine :) did. The //e was 
  completely useable up until about 2 or 3 years ago, which is still 8 or
  maybe 9 years after it came on the market! 

  Apple : build computers that are AHEAD of their time, like the ol' days.


 - Chris
   (Standard disclaimers)

--
Chris Trimble 	  | "Spalding, this calls for the Billy Bahroul"  - Ted Knight
chris1@uiuc.edu   | "Ar-oo-gull-ah, it's a vege-et-a-ble"         - Steve Martin
From: w.l.vaughn@LaRC.NASA.GOV (Wallace L. Vaughn)
Newsgroups: comp.sys.mac.hardware
Subject: Re: HOW DO I rename a hard disk????????
Date: 20 Nov 1992 17:42:45 GMT
Organization: NASA Langley Research Center, Hampton, VA  USA
Distribution: world
Reply-To: w.l.vaughn@LaRC.NASA.GOV (Wallace L. Vaughn)
NNTP-Posting-Host: b1205amac8.larc.nasa.gov

 

In article <kq4guB1w165w@bluemoon.use.com> djredick@bluemoon.use.com (Darrin 
J.
Redick) writes:
>>cwheeler@alsvid.une.edu.au (AlphaPrime) writes:
>>
>>> I have a Mac Classic II running system 7.1. I can't rename the hard disk.
>>> So far I have made sure the File sharing was off and made sure that no
>networ
>>> funtions are on.
>>> What do I do.
>>
>>Well, offhand, what _I_ would do is take the pointer, click on the name
>>of the hard drive, and type the new name.  I believe that is how it is
>>done.

>Patrick Parker
>University of Minnesota
>pharmacy@epx.cis.umn.edu answers

>I think he's aware that this used to be the way it worked, but is asking how 
>to
>do it now that System 7 has changed things.  I don't know how many other 
>people
>experience this problem, but I can't change my HD names without a utility
>either... and no I don't have sharing on, nor any applications running, etc. 
>Basically, I use DiskTools to rename the hard drive.  Also, I know if you 
>mount
>with System 6 you can change the name.  I'm curious as to why it's become a
>problem to rename hard drives.  Maybe this is a _feature_ of System 7 so as 
>to
>make it harder for non-welcome users from changing configurations.. who 
>knows.

It is a feature of system 7, the file sharing keeps track of things based on 
the machine name and hard disk name, if the hard disk name is changed it 
makes it hard for remote systems to find files. For instance in my own case I 
have alaised a folder, that is on my office mac, to my lab mac, when I whish 
to access the folder I just double click the alias and type the password in 
the dialog box (no need to use the chooser, switch zones, find my other 
machine a select the proper drive etc.). If I change the name of my office 
computer hard drive the filesharing program can't find the folder. So once a 
hard disk has been used for filesharing the system freezes the name. It is 
possible to change the name by using utility disks or booting from system 6, 
but I agree it is a bother. The balloon help tells you the name can't be 
changed but doesn't say why, Apple would save a lot of fustration by 
explaining why.

Just my $0.02
Wally Vaughn
Just my opinion not NASA's


Xref: sparky comp.sys.mac.hardware:21638 comp.sys.mac.system:14105
From: jh@heel.CS.Berkeley.EDU (Jack Hsu)
Newsgroups: comp.sys.mac.hardware,comp.sys.mac.system
Subject: How to print postscript file
Date: 16 Nov 1992 09:39:35 GMT
Organization: University of California, Berkeley
Distribution: world
NNTP-Posting-Host: heel.cs.berkeley.edu

I downloaded a few postscript files from school and wanted to print
them with my Mac and laserwriter. On workstations, one can just say
'lpr postscript.ps' to print a postscript file. How do I print it out
on a Mac?

I tried reading it in with Word 5.0 using EPS conversion format, but
the line-feeds were missing and it turned out a mess.

Does anyone have any experience with this? Please reply by email.
Thanks.

-Jack
From: Joe_D._Ciarcia@fourd.com
Newsgroups: comp.sys.mac.hardware
Subject: Re: Problem:Millions of Colors
Date: 15 Nov 92 22:12:37 GMT
Organization: 4th Dimension BBS

Call an exorcist .....or ghostbusters!!  It's an interesting problem! Joe C.
********************************************************************
System: fourd.com                                Phone: 617-494-0565
Cute quote:  Being a computer means never having to say you're sorry
********************************************************************