HDTenEightyP/NetNews huggingface dataset:
From: j_manning@csc32.enet.dec.com (John Manning)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: SpeedSTAR 24X
Date: 31 Jul 92 20:12:23 GMT
Organization: Digital Equipment Corporation



Well,  I received my SpeedSTAR 24X today.  I will give a mini-review at this
time(only had it about 3 hours).

I have it installed in a '386DX-25MZ machine with 4meg ram and am using a 
NEC Multisync monitor with it.  Because of the monitor, I have to use the 
following modes:

640x480  60HZ  NI
800x600  56HZ  NI
1024x768 43HZ  I

I don't have drivers that will work with the 1024x768x256 color mode with
VPIC but the 800x600x256 mode worked with the WD9030 driver.

I have installed the 800x600x256 and 1024x768x256 windows drivers and it is
very fast when using these drivers.  I got a 5.50 overall WINTach rating with
the 1024x768x256 drivers.  Unfortunately, the 16 color drivers are not the
WINSpeed drivers so the 16 color modes are considerably slower than the 256
color modes.

The board supports a wide range of horizontal/vertical freqs in the different
modes.  Here is a sampling:

256 Color modes:

640x480

Horiz			Vert		NI/I

31.5			70		NI
31.5			60		NI
37.8			72		NI

800x600

35.1			56		NI
37.8			60		NI
48.1			72		NI

1024x768		

35.5			43		I
48.3			60		NI
56.5			70		NI
58.1			72		NI


32,768 COLOR

640x480

31.5			60		NI
37.8			72		NI

800x600

35.1			56		NI
37.8			60		NI

16.7 MILLION COLOR

640x480

31.5			60		NI

It also has 1280x960x16 and 1280x1024x16 modes that use 49 KHZ horiz and 43HZ
vertical interlaced modes.


I am very pleased with the performance so far.  Now if I can just get that
17" monitor...


-------------------------------------------------------------------------------
|    John Manning                       |  Opinions expressed are my own.     |
|    j_manning@csc32.enet.dec.com       |  I do not represent Digital Equip.  |
-------------------------------------------------------------------------------
Newsgroups: comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc
From: pv9955@albnyvms.bitnet
Subject: Re: Upgradable motherboards?
Reply-To: pv9955@albnyvms.bitnet
Organization: University of NY at Albany
Date: Thu, 30 Jul 92 06:22:47 GMT

From what I've heard, upgradeable motherboards are not all they're cracked
up to be.
In theory they sound great!  But in practice, the cost of plugging in a new
clock crystal and CPU is not significantly cheaper (if it is cheaper at all)
than replacing the whole motherboard.  The only real benefit is the ease
of upgradeability-- just plug in a new chip instead of taking apart the 
whole computer.
In terms of how well they work, I would also be interested in any responses.

P. Volpe
From: corny@pub2.bu.edu (Josh Cheong)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: IOMEGA Drives
Date: 24 Jul 92 16:14:24 GMT
Organization: Boston University, Boston, MA, USA
Originator: corny@pub2.bu.edu



Has anybody tried out IOMEGA (Bernoulli) drives out there? How is the access time? Can
it run with Windows? How much did you pay for them? Thanks in advance for any replies.

-josh
Newsgroups: comp.sys.ibm.pc.hardware
From: jnsims01@ulkyvx.louisville.edu
Subject: WHAT? No more hard drives? HELP!
Organization: University of Louisville
Date: Fri, 31 Jul 1992 15:00:29 GMT

We are facing a dilemna which I don't know how to solve. Any help and/or
suggestions you can give will be *greatly* appreciated.

We have a wide range of vendors and models of PC's on campus. Many of them are
older XT class machines which are still in productive use. We are being told by
our main vendor that 1) MFM hard-drives are no longer obtainable, 2) IDE drives
smaller than 40MB are rapidly becoming unobtainable, and 3) they have no
suggestion as to how we can install new and/or replacement hard drives in these
older PC's. We would be perfectly willing to begin installing an IDE 40MB drive
and interface into these older machines, but no one we talk to thinks it can be
done. In these economic times, telling our users to replace the PC when the
hard drive dies is technologically correct but financially unacceptable.
 
Does anyone have a solution to this problem? I know its considered rude to ask
you to e-mail instead of post, but I can't keep up with news and the NETGURUS
are my only hope. Thanks in advance.


 My wife AND my employer ignore my opinions - feel free to do the same!
.......................................................................
: John Norman Sims, Jr.    : Internet: jnsims01@ulkyvx.louisville.edu :
: University of Louisville :     (or)  jnsims01@ulkyvm.louisville.edu : 
: Computing and            :   BITNET: jnsims01@ulkyvm                :
:       Telecommunications : You can't win, you can't break even,     :
: Phone: (502) 588-5565    :       and you can't get out of the game! :
:.....................................................................:
From: rmartin@oasys.dt.navy.mil (Robert Martin)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Mountain Tape problem
Date: 23 Jul 92 18:51:35 GMT
Reply-To: rmartin@oasys.dt.navy.mil (Robert Martin)
Distribution: na
Organization: Carderock Division, NSWC, Bethesda, MD

There is no TSR program that can chew up a backup tape.

Your tape drive is defective.  Replace or repair it.


Good Luck .....   Bob
Newsgroups: comp.sys.ibm.pc.hardware
From: nelson_p@apollo.hp.com (Peter Nelson)
Subject: Re: What the 17" monitor reviews never tell you
Date: Mon, 27 Jul 1992 15:10:17 GMT
Organization: Hewlett-Packard Corporation, Chelmsford, MA

In article <1992Jul25.154828.25434@csus.edu> wilson@cssmtf.ccs.csus.edu (Joe Wilson) writes:
>In article <1992Jul24.040047.3903@highlite.uucp> yarvin@highlite.uucp (Curtis Yarvin) writes:
>>In article <1992Jul22.041743.9806@sinkhole.unf.edu> shite@sinkhole.unf.edu (Stephen Hite) writes:
>>>
>>>   I just wanted to let anyone who is deciding to purchase a 17" monitor
>>>for X386 work to be be cautious when making their decision.  I just
>>>bought one of the highest rated monitors in the $1100 price range
>>>(the Nanao 550i) and the one  I got has a tremendous problem with this
>>>"rainbow effect" at 1024x768.  There's a term for it that starts with the
>>>letter 'm' that I can't remember but the "look" is akin to a magnetic field
>>>pattern.
>>
>>Misconvergence.  This is an annoying and common problem in cheap monitors;
>>the convergence may be correctly-adjusted in the factory, but the slightest
>
>- a lot of stuff deleted - 
>
>     I believe the "m" word being sought is "moire" as in "moire patterns"
>which are wavy patterns across the face of your monitor.  This is a common
>problem with larger monitors, especially with a light background color.

    I'm curious about this.  I've worked as a software engineeer in computer
    graphics with engineering workstations since 1983 and I've seldom used
    anything smaller than 17 inch, and typically the ones I've used have
    been larger.   I have *never* seen a moire pattern problem with a 
    monitor.   Since a moire pattern is an interference pattern, what is
    the interference between?
   
    I have seen various kinds of convergence and focus and other adjustment
    problems but I can't say that they seem to be worse on bigger monitors
    in my experience.  


---peter
From: aal@broue.rot.qc.ca (Alain Hebert)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: CRITICAL: Schematic needed for Priam 738!
Date: 29 Jul 92 02:22:10 GMT
Distribution: world
Organization: Groupe de Recherche Operationnelle en Telecommunication (ROT)
Keywords: PRIAM CRITICAL 738
Summary: Help restore life to a Public Internet Site!
X-Newsreader: Tin 1.1 PL4


	Hi!  Anybody that read this post: Thank you!

	A month ago my brand new Seagate WREN-9 blow-up is power-in circuitry
	and short the 5v, 12v and the ground:  it cascade and softly crake
	something/somewhere/somehow on my old buddy (a Priam SCSI, Full Height
	5 1/4" width, 320M formatted dated back in 1989, identified by 738
	or ID330-SF and its Novell certified) to end inside my switching
	power supply.

	1. Priam die 2 year ago by simply shutting down the compagnie result:
	   Nobody Bought Them so Nobody got the damn schematic!

	2. I've call from Montreal to California (even trying Novell, because
	   its Novell ceritified and they suppose to repair any certified
	   drive: BULLSHIT!  Is a compagnie called Micro-Dyne (spelling!) that
	   do that and the first answer was: "Huh? Priam? What's that?").
	   No cie out there is Pro enought to sell me those schematic and
	   I'm willing to pay more that they gonna charge me to trash my drive!

	3. I need any piece of schematic that can help me (even different
	   model on the same serie)...

	x. I've send a mail to Ciacia (BYTE) and some peoples of that kind!
	   Hope, hope, hope...

	I really need those schematic, because I can't afford to have anybody
	play with my drive for 1K and trash-it, destroy what's on it!  I
	will loose a month of intense port/modif to most of the Usenet-ware
	and others Internet Packages that I was suppose to release a the
	end of the summer... for ISC 3.0!

	Good Side for my site:	Go a Elite-2 as replacement for my WREN-9
	(Gain +300M), I've install a set of fuse on the 5v and 12v that can
	barely tolerate the Drive so any funny stuff from the Seagate drive
	or other devices are restricted, we generate a firework when we try to 
	put some life back in the damaged power supply:  1 Capacitor has launch
	to finish is course deep in the ceiling, nice smoke do!

	So!  Wanna help US (All peoples using ROT)?  Pleaaase!

-----
Alain Hebert              | Synerlogic (a Anderson Consulting Division)
                          | 1405 Trans-Canada, Suite 300     Voice: 514-685-7575
Consultant for Synerlogic | Dorval, Qc, Can H9P 2V9          Fax:   514-685-7692
      and (part-time)     |
Sysadmin for R.O.T        | Recherche Operationelle en Telecommunication
                          | 5867 De La Roche                 Voice: 514-948-2492
aal@rot.qc.ca             | Mtl, Qc, Can, H2S 2C8            IP:   192.77.49.131
-----
Newsgroups: comp.sys.ibm.pc.hardware
From: austin@frnk409.franklin.COM (Austin G. Hastings)
Subject: Re: Cyrix Math Coprocessors
Followup-To: comp.sys.ibm.pc.hardware
Reply-To: austin@franklin.com
Organization: Franklin Electronic Publishers, Inc., Mt. Holly, NJ USA
	<1992Jul17.013828.18877@ra.msstate.edu> <Bs0von.14o@world.std.com>
	<1992Jul28.220252.1866@usho93.hou281.chevron.com>
	<154rlqINNgl8@hilbert.math.ksu.edu>
Date: Thu, 30 Jul 1992 17:59:38 GMT

In article <154rlqINNgl8@hilbert.math.ksu.edu> tar@math.ksu.edu (Tim Ramsey) writes:

   hhtne@usho52.hou281.chevron.com (H.T.Nettles) writes:

   >    83D87-33  $ 85
   >    83D87-25  $ 85

   Assuming these prices are still valid, is there any reason to purchase
   the 83D87-25 over the -33?

Yes.  It's slower.


(;-> ;-> ;-> for the risibly impaired!)

-- 
 **************************************************************************
** DEBUGGING is no substitute for                         Austin Hastings **
*        TESTING is no substitute for                 Austin@Franklin.Com  *
*              DESIGN is no substitute for             USA+[609] 261-4800  *
From: chbl@sbustd.rz.uni-sb.de (Christian Blum)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: My PC needs to be 'warmed up', what's happening?
Date: 30 Jul 92 11:06:46 GMT
Organization: Studenten-Mail, Rechenzentrum Universitaet des Saarlandes

gtj@goanna.cs.rmit.oz.au (Glenn T Jayaputera) writes:
> Everytime I turn it on after being off for more than 6 hours, it hangs.
> I have to wait for 15-20 minutes (warming up), then I can reset and it can
> boot up from there perfectly.
> 
> Is this the sign of 'dying' power suply? SHould I fix it or better buy
> the new one.

Most likely, it's a defect of the board itself. Mine used to show similar
symptoms... it all stopped when I put a rubber gum under the board where
the processor is located... yes, it's true! I believe it's a damaged track.

Chris
Newsgroups: comp.sys.ibm.pc.hardware,comp.periphs.scsi
From: ski@phantom.cs.hut.fi (Sami Kivilaakso)
Subject: Re: Problems installing a second SCSI drive with ST-02
Keywords: SCSI, Seagate ST-02
Reply-To: ski@niksula.hut.fi (Sami Kivilaakso)
Organization: Helsinki University of Technology, Finland
Date: Wed, 29 Jul 1992 05:34:29 GMT

In article <1992Jul27.132757.23138@src.umd.edu> chad@eng.umd.edu (R Michael McMahon) writes:
>In article <1992Jul25.002528.22672@leland.Stanford.EDU>, jbradfor@leland.Stanford.EDU (Jeffrey Bradford) writes:
>> 
>> Last year when I was installing my second hard disk, I had the
>> *exact* same setup and the *exact* same problem.  Sorry to say, the
>> only solution I found was to buy a new SCSI card.  You were right:
>> from what I was told, the ST-02 will only work with Seagate drives.
>> Do yourself a favor: burn the ST-02 and buy a *real* SCSI card :-}
>> 
>> Jeffrey Bradford
>
>No Jeff, the ST-02 works with non-Seagate drives. I once had (pre-1542 days) 
>a Seagate ST-02 working with an ST296N and a Quantum 105S. I suspect an 
>address/parity/terminator problem with Sami's setup. Double check that the
>drives and host all have different SCSI addresses, all share the same parity
>setting, and that (only) the LAST drive on the SCSI bus (cable) is terminated.
>
>R Michael McMahon	chad@src.umd.edu

	No Michael, my setup was ok in these respects.

	I got many replies by mail. Thanks to all who responded.
	Most of the replies indicated, that people had had the
	same kinds of problems with their ST-02 controllers. It had
	worked with some non-Seagate drives, but these occasions
	were few. What's more surprising - it doesn't seem
	to work with all Seagate drives either.

	Anyway, I've decided to buy the Adaptec-1542B controller.
	So, I guess, my problems will soon be history...

				-- Sami
--
*****************************************************************************
 Sami Kivilaakso  !  ski@niksula.hut.fi      !   Helsinki Univ. of Technology 
                  !  kivilaak@tele.nokia.fi  !   FINLAND  
*****************************************************************************
From: trader@infopls.chi.il.us (Steve Kovack)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Tape backup or cd_rom
Date: 27 Jul 92 02:38:28 GMT
X-Maildoor: WaflineMail 1.00r

Alexander Chislenko's fingers blurted out at All
on the subject of "Tape backup or cd_rom ?"

 AC> Actually, I want to buy both.
 AC> And I have only one drive bay to use.
 AC> Will I have to remove one of floppy drives, or have to get
 AC> one of these external, of there are some better options?


Alexander, you might want to try one of the new dual media floppy
drives. It has both 5.25 & 3.5 high density drives in a 5.25 1/2
height package. I will be using one in my system when I install a 
CD ROM drive. I know that one is made by Chinon and there is one other
manufacturer making them also. 

Hope that helps,
Steve Kovack (trader@infoplus.chi.il)

 
... Bad command or filename.  Go stand in the corner.
--- Blue Wave/QWK v2.10
                              
Newsgroups: comp.sys.ibm.pc.hardware,comp.binaries.ibm.pc.wanted
From: katuulos@polaris.utu.fi (Kalle T. Tuulos)
Subject: DTK 486/33 password
Organization: University of Turku, Finland
Date: Mon, 20 Jul 92 20:52:24 GMT

I've been using a DTK 486/33 since last December on my workplace. When I got
that machine, I immediatelly put a password so that no one else but
me could mess with BIOS settings. Now, I'm leaving that work place
due to military service and I've completely forgotten what that
password was. I've tried about 200 different words which would be the
logical ones, but no use.
  There is no battery or accumulator on motherboard, so I can't simply
remove it for couple of minutes and so wipe CMOS clean.
  Has anyone encountered similar problems? Any suggestions how to go
forward? Is there any program which could help me?

Thanks in advance,

Kalle
--
Kalle T. Tuulos		katuulos@utu.fi
- a physics student from University of Turku, finland
From: flash@aragorn.CSEE.Lehigh.Edu (Steve Corbesero-85001)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Formosa MicroSystems Motherboard and 387 Problem
Keywords: help
Date: 21 Jul 92 19:40:38 GMT
Organization: Lehigh University

We just received four 386-33 systems using the FM-S386C-33 Motherboard
from Formosa MicroSystems.  Overall, the system seems to be pretty
nice and standard, including an AMI bios dated 7/7/91.  When I plug in
a Cyrix 387/33 co-processor.... The system hangs after the memory test
and does not get to the usual screen shoing the system configuartion.
I have looked through the manual and found no jumpers which must be
set.  Also, the bios does not have a prompt to enable/disable the
co-processor.  I have had the same results with two different
computers and two different co-processors.

Does anyone have any pertinent information. If I can not get the
systems to work, I will have to send them back.  A co-processor is a
requirement for the applications we plan on running.

Thanks, as always, in advance.


--
Stephen Corbesero
CSEE Dept, Lehigh University
Newsgroups: comp.sys.ibm.pc.hardware
From: georged@sequent.com (George Dolbier)
Subject: ATI Ultra with a Viewsonic 8
Summary: anyone running this combo??
Keywords: ATI Ultra Viewsonic 8
Organization: Sequent Computer Systems Inc.
Distribution: na
Date: Thu, 23 Jul 92 17:25:02 GMT

Is anyone out there using an ATI ultra with a Viewsonic model 8
Viewsonic 8 = 20 inch 1280x1024 .31 dot pitch. (correct me if I am incorrect)

Suggestions, Opinions, Experiences all wanted and welcome.


-----------------------------------------------------------------------------
George Dolbier                                  Sequent Computer Systems Inc.
UUCP: uunet!sequent!georged                     15450 S.W. Koll Parkway
Internet: georged@sequent.com                   Phone: (503) 578-5776
						Fax:   (503) 578-3073



Newsgroups: comp.sys.ibm.pc.hardware,comp.sys.ibm.hardware
From: fluet@ee.ualberta.ca (Kevin Blaine Fluet)
Subject: Re: TVM vs. Goldstar (??)
Organization: University Of Alberta, Edmonton Canada
Date: Thu, 30 Jul 1992 02:13:47 GMT

I don't know much about Goldstar monitors (other than seeing them in stores)
but I do use a TVM every day at work.  I would have no problem buying one.
One problem we have had with them is a lack of adequate shielding.  If the 
monitor is too close to some other electrical device that is generating
a magnetic field, such as a computer (!) the colours bleed.  At work they 
are only connected to tower pc's which stay on the floor, so it isn't a big
deal for us, but I don't know how they would be sitting atop a desktop PC.

Anyway, hope this helps.

Cheers, 

----------------------
Kevin Fluet
fluet@ee.ualberta.ca
----------------------

-- 
Authority:  A person who can tell you more than you really care to know.
From: frank@cs.yorku.ca (Frank Pikelner)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: CT&T Super Math 387
Date: 24 Jul 92 18:40:33 GMT
Article-I.D.: yetti.1361
Distribution: world
Organization: York University, Dept. of Computer Science

There is now much talk about the Cyrix 387 math chips and prices. I was just
looking at the CT&T math chips that claim much of the same as Cyrix. Are these
chips any good? The numbers spec look impressive.

BTW - anyone have any specs/benchmarks for the various math chips?

Cyrix, CT&T, Intel, IIT, ULSI, [AMD?]
-- 

--------------------------------------------------------------------------
 ---  ---    Frank Pikelner                                          /~\
 \    \  \   Technical Assistant, Department of Computer Science    <v.v>
  \-   \--   York University (Toronto, Canada)                      ,\^/;
   \    \    Internet: frank@cs.yorku.ca                            _{!}_
--------------------------------------------------------------------------
From: ting@mozart.amd.com (William Ting)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Looking for IBMPCjr IR keyboard receiver pinout
Date: 24 Jul 92 13:14:42 GMT
Organization: AMD

Hi all,
Does anyone has the Keyboard IR receiver pin-out for IBMPCjr?
I would like to modify the receiver for my AT286 PC. Thanks for information.
Please email the response to me
Ting@asahi.amd.com	
Newsgroups: comp.sys.ibm.pc.hardware
From: medin@catbyte.b30.ingr.com (Dave Medin)
Subject: Large monitor advice needed
Reply-To: medin@catbyte.b30.ingr.com
Organization: Intergraph Corporation, Huntsville AL
Date: Thu, 30 Jul 1992 16:53:51 GMT

I've been tasked with obtaining a 20" or 21" monitor
for my dad's architectural firm's computer (running AutoCAD). How
about some input from large-format monitor users about their
favorite models (or least favorite)? Potentially, the monitor
will run up to 1280 X 1024 non-interlaced at 70 Hz refresh.

Please E-mail your recommendations. Thanks!

-- 
 --------------------------------------------------------------------
       Dave Medin			Phone:	(205) 730-3169 (w)
    Intergraph Corp.				(205) 837-1174 (h)
       M/S GD3004
  Huntsville, AL 35894 		Internet: medin@catbyte.b30.ingr.com
				UUCP:  ...uunet!ingr!b30!catbyte!medin

   ******* Everywhere You Look (at least around my office) *******

 * The opinions expressed here are mine (or those of my machine)
Newsgroups: comp.sys.ibm.pc.hardware
From: semaurik@descartes.uwaterloo.ca (Sean Maurik)
Subject: Help me hook up a second Hard Drive
Summary: need to get hold of maxtor
Keywords: maxtor slave hard drive
Organization: University of Waterloo
Distribution: na
Date: Tue, 28 Jul 1992 19:29:50 GMT

  Hi there, I have a 40 meg Maxtor drive (I don't have the model handy) and
want to hook it up as a slave hard drive.  I currently have an 80Meg quantum
Go drive in the machine.  Both drives are IDE and so is the controller but
no matter what I try I can't get both drives to work.  I can get either one
to work alone but not both together.
	Does anyone know how I can get hold of maxtor to ask them about it
or does anyone have any ideas of their own that might help.  I've tried
everything I can think of but with finals approaching thinking is no longer
something I'm very good at.

		Thanks in advance,
				Sean Maurik
				semaurik@descartes.uwaterloo.ca

Xref: sparky comp.sys.ibm.pc.hardware:20158 comp.dcom.modems:11039
From: tnixon@hayes.com
Newsgroups: comp.sys.ibm.pc.hardware,comp.dcom.modems
Subject: Re: Short Review of Gateway 2000 Telepath
Date: 23 Jul 92 11:16:19 GMT
Organization: Hayes Microcomputer Products, Norcross, GA

In article <1992Jul22.185248.14834@usenet.ins.cwru.edu>,
axa12@po.CWRU.Edu (Ashok Aiyar) writes: 

> I have dialled
> several other types of modems (ranging from those on Hayes
> BBS line - 800-US-HAYES; are these Ultra 144 modems?) 

Yes, all of the modems on our BBSes are Ultra 144.

-- 
Toby Nixon, Principal Engineer      | Voice   +1-404-840-9200  Telex 401243420
Hayes Microcomputer Products, Inc.  | Fax     +1-404-447-0178  CIS   70271,404
P.O. Box 105203                     | BBS     +1-404-446-6336  AT&T    !tnixon
Atlanta, Georgia  30348             | UUCP uunet!hayes!tnixon  Fido   1:114/15
USA                                 | Internet                tnixon@hayes.com
From: davidsen@ariel.crd.GE.COM (william E Davidsen)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Calma digipad info needed
Date: 24 Jul 92 18:30:53 GMT
Reply-To: davidsen@crd.ge.com (bill davidsen)
Organization: GE Corporate R&D Center, Schenectady NY

I just got three Calma digitizing pads for a good price, without any
documentation whatsoever. They *appear* to have a 9 pin serial
connection, and I'm hoping to use them in place of a mouse by writing a
little driver.

Does anyone have any information on these?
-- 
bill davidsen, GE Corp. R&D Center; Box 8; Schenectady NY 12345
	It never ceases to amaze me that otherwise rational people, able to
	understand calculus, compound interest, and the income tax form, can
	continue to believe that poker is a game of chance.
Newsgroups: comp.sys.ibm.pc.hardware