HDTenEightyP/NetNews huggingface dataset:
From: rnichols@cbnewsg.cb.att.com (robert.k.nichols)
Subject: Re: [Q] How do Game Ports Work?
Organization: AT&T
Date: Sat, 2 Jan 1993 22:19:22 GMT

In article <1993Jan1.231920.1@vms.ucc.okstate.edu> v923137@vms.ucc.okstate.edu writes:
>In article <1i2lnqINNso8@faatcrl.Faa.Gov>, warb@tgf.tc.faa.gov (Dan Warburton) writes:
>> Q1. Can you have more than one Game port enabled?
>>     I have one on the Seril/Par Board and one on a PAS16 board.
>
>A1.   Yes. The IBM can support up to two joysticks on ONE 15-pin port.
>      I am not sure about using two joysticks on two ports, as you are
>      suggesting, however, I'm sure it is quite possible.

Oops!  I think we have a slight misunderstanding here.  As you said,
ONE game port supports TWO joysticks -- but that's still ONE game port.
You can't run two game ports on the same machine unless you find a
game port controller that can be switched to a non-standard I/O address
(unlikely), a driver which can access this address (the BIOS routines
are hard-coded to a single address), and game software that can
utilize this driver (even more unlikely).  So, the answer is
essentially: "No."

>> Q2. How do the games know when a button is pushed? Interrupt, polling
>>     something else.
>
>A2.   I have done some programming on 286/386 machines using assembly 
>      language to read joystick ports.  I was not interested in whether
>      the button(s) were pushed, but only about the values of the pot. lines.
>      The standard game port works by the program issuing an interrupt, at
>      which  time the port is scanned, and the values of all potentiometers
>      and buttons are loaded into a buffer.  Then you read that buffer at your
>      (the program's) leisure to find the position of the stick/buttons.
>      This way you do not have to immediately process the joystick data and
>      run the risk of the joystick moving while you are reading one axis, and
>      the other axis changing before you get to it. ...

If you examine the BIOS code that read the game port, you'll find that
each of the 4 potentiometers are read separately.  Essentially, the
sequence is:

	1.  Record the value of a timer.

	2.  Inhibit interrupts.

	3.  Trigger the monopulsers in the game controller.

	4.  Poll the game controller until the pulse you are now
	    measuring has ended.

	5.  Read the timer again.

	6.  Re-enable interrupts.

	7.  Compute the elapsed time from the 2 timer readings.

	8.  Repeat steps 1-7 for the remaining 3 analog inputs.

	9.  Return the 4 measurements to the caller.

So, there is still the possibility that one channel has changed while
another was being measured, but at least this is all within the scope
of one BIOS call.

As for the button presses, the BIOS will tell you the current state of
the buttons any time you ask (i.e., poll).  It's the same BIOS call:
DX=0 returns the current switch positions in AL bits 4-7; DX=1 reads
the resistance inputs and returns the results in AX, BX, CX and DX.

Bob Nichols
AT&T Bell Laboratories
rnichols@ihlpm.ih.att.com
Newsgroups: comp.sys.ibm.pc.hardware
From: mtichy@fraser.sfu.ca (Martin Tichy)
Subject: Stereo-On-One
Organization: Simon Fraser University, Burnaby, B.C., Canada
Date: Tue, 29 Dec 1992 19:35:02 GMT

I'd like to build a stereo-on-one soundcard but I don't live 
in the UK so I can't get the ZN* D/As.  In the HARDWARE.DOC 
included with ModPlay 2.19B it gives National Semiconductors 
substitutes for the mono D/A:
 
>     Lots of people have found that they cannot get the ZN* chips
> outside
>     the UK - so heres a circuit that will do the same as above..
>     Use a DAC0800 or DAC0801 or DAC0803 from National
> Semiconductors...
 
I didn't see any substitute D/As for the ZN428 to be 
used to build the stereo-on-one.  Which brings me to the 
question: "Has anyone built this thing that can provide me 
with a National Semiconductors part number to be used instead 
of the ZN428?  He mentions mentions:
 
>       If a ZN428 is not available, any D/A with input latches will
> work -
>       the D/A should latch the data bus when pin 4 (!EN) is low.
 
So maybe this will help any electronics wizards out there 
giving me a part number.  I'm no wiz so the above isn't 
specific enough for me.
 
Thanks.
 

Newsgroups: comp.sys.ibm.pc.hardware
From: hcp@csx.cciw.ca (H.C. Pulley)
Subject: Re: Just how fast is SCSI-II, really?
Organization: Canada Centre for Inland Waters
Date: Mon, 21 Dec 1992 17:24:25 GMT

In article <BzMB0x.BGz@usenet.ucs.indiana.edu> ntaib@silver.ucs.indiana.edu (Iskandar Taib) writes:
>In article <yB8cVB1w165w@Fateepee.CAM.ORG> tommy@Fateepee.CAM.ORG (Tommy Petrogiannis) writes:
>
>>There are 3 (actually 4) flavors of SCSI-II peripherals.
>>	1) SCSI-II @ 5MB/sec (this is the 4th flavor but nobody should use it)
>>	2) SCSI-II @ 10MB/sec (the majority of SCSI-II peripherals)
>           ^^^^^^^^^^^^^^^^^^ I've heard this referred to as Fast-SCSI.
>>	3) Wide SCSI-II @ 20MB/sec (uses a 16 bit data path)
>>	4) Wide SCSI-II @ 40MB/sec (uses a 32 bit data path)
>           ^^^^^^^^^^^^^^^^^^^ Would this then be Fast Wide SCSI?

Actually, I have heard it called (at HP new product demos) Fast-AND-Wide SCSI.

Harry
-- 
         hcp@csx.cciw.ca          |This message released|It takes all kinds,
   hcpiv@grumpy.cis.uoguelph.ca   |to the PUBLIC DOMAIN.|and to each his own.
----------------------------------+---------------------|This thought in mind,
Stay away from the DOS side, Luke!|Un*x don't play that.|I walk alone.
Newsgroups: comp.sys.ibm.pc.hardware
From: des@ausom.oz.au (Dale Staines)
Subject: ESDI Controllers
Date: Mon, 21 Dec 1992 11:27:53 GMT
Organization: AUSOM - The Apple Users Society of Melbourne

hello

I an look for some information on a Western Digtal EsDI Controller
card for my IBM the Model number is WD1007A-WA2

I would like to know where the rom address is and can I move it

And where the I/o registers are in the Address space

I need this info to see if i can get this ESDI controller to work
with a SCSI controller

Thanks In Adavance
Please Relpy with E-Mail to the Address below Relpy is not working at the
time.

-- 
Dale Staines
Reply Does Not Work Please E-Mail to The Address Below
E-Mail Internet : des%ausom.oz@sol.cc.deakin.oz.au
Apple II Forever and A One or Two
Newsgroups: comp.sys.ibm.pc.hardware
From: twfh5@isuvax.iastate.edu
Subject: RE: Packard Bell Experiences?
Reply-To: twfh5@isuvax.iastate.edu
Organization: Iowa State University, Ames, Iowa
Date: Fri, 1 Jan 1993 06:10:28 GMT

Packard Bell (affectionally dubbed 'Packard Bomb') has two things going for it:
1. It is dirt cheap.
2. It is one of the few computers that you can just walk into a Wal-Mart or a
   Best Buy and purchase.
 
This means that it is a computer that is more likely to be purchased by
somone without a lot of knowledge about computers.  (I am not saying you are
not knowledgable, just that this factor could explain why Packard Bell
computers are as frequent as they are.)
 
No matter what computer system there is, someone will have something negative
to say about it.  But, from people I have known who have worked with Packard
Bells, the negative seems to stand out.  The one complaint I've heard over and
over again is that if you go to upgrade your computer with extra memory or
anything else, you will find the inside of the machine laid out in a weird way
quite different from a typical clone.  Weird meaning that it's difficult to
work with its insides.
I've heard rumors of a high failure rate, but you will have to check with
others to see if this is so.
Power supply failure is what I've unofficially heard as a common form
failure.  I've looked at stats in Computer Shopper and noticed that any given
class of Packard Bell tends to run at a much lower wattage than other machines
in the same class.  If one is not going to do much expansion, that may be fine.
But if you're thinking of lots of add-ons, it might have more proneness to
overheating.
I know a repairperson who groans when he hears the words Packard Bell... that
may not mean much, but it seems representative of what I have heard about them.
 
And though I don't know how Packard Bell carries out its warranties, I felt
a bit leery when I read the specs of their warranty.  It seems that the
warranty does not like you putting any non-Packard Bell-installed components
into your computer.  Given that you may want to pick up components from a 
variety of third party manufacturers, this is something to consider.
Newsgroups: comp.sys.ibm.pc.hardware
From: sonny@charybdis.harris-atd.com (Bob Davis)
Subject: Re: Can SCSI Transfer Rate be Increased??????
Date: Sun, 27 Dec 1992 13:57:06 GMT
Reply-To: sonny@trantor.harris-atd.com (Bob Davis)
Organization: Advanced Technology Dept., Harris ESS, Melbourne, FL

In article <1992Dec24.005457.2257@netcom.com> gasman1@netcom.com (David A. Silva) writes:
>Jim Lick (jim@ferkel.ucsb.edu) wrote:
>

>
>: That is probably true.  ISA SCSI boards don't vary much as far as
>: throughput is concerned.  You could get faster response times by
>: using a caching controller, but your transfer rate probably would
>: stay about the same.  It's also likely that your drive already has
>: its own cache.
>Jim
>I don't know about this. I am running an Adaptec 1542B on an ISA system
>with a hard drive comparable to the Rodime being compared, and the
>slowest transfer rate I got was 1800 KB/s, and with tweaking of the
>bus-on/off times and the DMA transfer speed, I've gotten it up to
>2800-3000 KB/s. I have a friend with the EISA Ultrastor, and he is
>getting around 8000 KB/s with the internal cache turned off on the HA.
>
>David

	That's astonishing... 8000 Kbytes/sec?

	Surely, the transfer rate from a hard drive is limited by
the rate at which bytes can be spun under the heads and presented 
for reading. Let's assume there are 64 sectors per track (there are
probably fewer than that and it will reduce the xfer rate below what
I am about to calculate). Each sector contains 512 bytes. Also,
let us assume that the drive spins at 3600 rpm (which is 60 revs/second).
The rate at which bytes are spun beneath the heads, which is the
maximum prolonged transfer rate, is therefore:

	Max xfer rate = 64sectors/rev x 512bytes/sector x 60revs/sec
                      = 1920 Kbytes/second

Therefore, to achieve 8000 Kbytes/sec transfer rate, the drive
rpm would have to be at least 4 x 3600 = 14,400 rpm and no drive
I know of spins that fast. Or there would need to be 4 x 64 =
256 physical sectors/track and no drive I know of has that many sectors.

	So I am mystified as to how the extraordinarily high xfer
rates you quote can be achieved.


_____________________________________________________________________________
Bob Davis, UofALA alum \\ INTERNET: sonny@trantor.harris-atd.com  |  _   _  |
Harris Corporation, ESS \\    UUCP: ...!uunet!x102a!trantor!sonny |_| |_| | |
Advanced Technology Dept.\\ AETHER: K4VNO          |==============|_/\/\/\|_|
PO Box 37, MS 16/1912     \\ VOICE: (407) 727-5886 | I SPEAK ONLY | |_| |_| |
Melbourne, FL 32902 USA    \\  FAX: (407) 729-3363 | FOR MYSELF.  |_________|

Newsgroups: comp.sys.ibm.pc.hardware,comp.os.msdos.misc,comp.os.msdos.programmer
From: buchignani@hg.uleth.ca
Subject: Re: Future Domain phone number?
Reply-To: buchignani@hg.uleth.ca
Organization: University of Lethbridge
Distribution: usa
Date: Sat, 26 Dec 1992 19:21:01 GMT

Future Domain's tel. is (714) 253-0400; their fax is 253-0913

    Norm Buchignani/University of Lethbridge/BUCHIGNANI@HG.ULETH.CA
"If we have been accustomed to deplore the spectacle...of a workman occupied
during his whole life in nothing else but the making of knife-handles or pins'
heads, we may find something quite as lamentable in the intellectual class, in
the exclusive employment of a human brain in resolving some equations, or in
classifying insects. [This] occasions a miserable indifference about the
general course of human affairs, as long as there are equations to solve and
pins to manufacture."                                      Auguste Comte
Newsgroups: comp.sys.ibm.pc.hardware
From: ncollins@cray.com (Nathan Collins)
Subject: AT I/O card settings for com 3
Summary: setting up I/O board for com 3
Keywords: I/O, com 3
Organization: Cray Research, Inc.
Distribution: usa
Date: 21 Dec 92 07:26:29 CST

I'm trying to set up an I/O board for COM 3 in our IBM AT compatible,
not having much success. We already have com1 and com2 working, one is
for a modem the other is connected to a unix workstation. The card I'm 
adding has two sets of switches, one controls which port the card is 
and the other the interrupt request, IRQ3 and IRQ4. I think I got the 
port switch right, but I'm unsure on the IRQ, what do I need to have 
this set to? IRQ3 or IRQ4? Any ideas or advice would be appreciated.
The documentation is vague at best, and I don't know what IRQ is used on
com1 and com2.

thanks,
Nate
-- 
Nate Collins                           "I speak for myself, not my corporation,
Field Engineer -  Cray Research, Inc.      and not for you, just for me."
e-mail:    ncollins@techops.cray.com    Located in the greater Pittsburgh area

Newsgroups: comp.sys.ibm.pc.hardware
From: th9708@meibm8.cen.uiuc.edu (Todd Lee Henderson)
Subject: Dee One Systems, Anyone dealt with them??
Organization: University of Illinois at Urbana
Date: Sat, 26 Dec 1992 19:56:39 GMT

Yep, this is another one of those 'have you had any good or bad experiences
with' Dee One Systems post!  :):)

They seem to have some pretty good prices on motherboards alone, the 
DX2-66 that the guy told me about uses AMI bios and SIS chipset.  I've
never heard of the SIS chipset???

Any comments are appreciated!

Todd
From: sidwell@ohstpy.mps.ohio-state.edu
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Advice solicited on 2nd IDE hard drive in 80-170 MB range
Date: 28 Dec 92 10:04:33 EST
Organization: The Ohio State University, Department of Physics

I'm soliciting opinions on the best choice for a 2nd IDE drive in the 120-
170 MB range. This is for a 486/25DX home computer heavily used for games. My
current drive is a 120 MB Conners 30104 (H?). I'm interested in
compatibility with the above as master drive, reliability, transfer
rate/access time, and noise level in roughly that order. My AMI BIOS is 
dated mid '91.
      For the record I get ~498kb/sec transfer as measured by PC Mag Bench 7.0,
and ~18-19ms access time on the Conners using the $20 IDE interface from 
HDI. 

Drives of interest are:
Western Digital WD280A, WD2120, or 2170
Conner CP30104, or CP30174
Maxtor MX7120

The Western Digital drives are tempting since HDI throws in Stacker (
version 2.0?) with the deal. I've heard some grumbling about noise 
regarding these drives. I've also read complaints about Maxtor and Conners 
drives being unhappy as master/slave.  

Thanks very much for your advice and nethelp, Ron Sidwell

P.S. Quietest drive I've ever had was my old Mitsubishi 60Mb RLL.
From: joak@ocf.berkeley.edu (Jonathan A. Kung)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Types of memory chips
Date: 2 Jan 1993 03:05:22 GMT
Organization: U.C. Berkeley Open Computing Facility
NNTP-Posting-Host: locusts.berkeley.edu
Summary: What's the difference?

I do not understand why memory chips are differentiated by price
and name like DRAM, SIPP, SIMM, etc, and what exactly things like
"256x4" and those other numbers mean.  Could someone please inform
me on what makes these different, and how to read "256x4"?

Thanks!
Jon Kung
Newsgroups: comp.sys.ibm.pc.hardware
From: rnichols@cbnewsg.cb.att.com (robert.k.nichols)
Subject: 386SX-16 succeeds in high-speed download
Organization: AT&T
Date: Thu, 24 Dec 1992 03:36:08 GMT

Showing total disregard for conventional net.wisdom, on this date a
lowly 386SX-16 clone has successfully completed a 500KB data transfer
at 9600 bps using a Digicom Scout Plus internal modem and the Windows
Terminal program.  The transfer completed with ZERO retries using the
XMODEM-CRC protocol with 1K blocksize.  Measured average throughput
was 744 cps, or 77% of the theoretical limit of the async channel.
(The channel imposes a 2-bit overhead on each byte, so the useful
bandwidth is 7680 bps or 960 cps.)

Please pardon my astonishment.

Bob Nichols
AT&T Bell Laboratories
rnichols@ihlpm.ih.att.com
Newsgroups: comp.sys.ibm.pc.hardware
From: dlg6627@uxa.cso.uiuc.edu (Darmawan  Ludirdja)
Subject: Re: Rodime Drive R03259a
Organization: University of Illinois at Urbana
Date: Sun, 3 Jan 1993 22:02:52 GMT

dla@se05.wg2.waii.com (Doug Acker) writes:

>I  just  inherited a Rodime Drive -- R02259A ... supposely its a 210MB
                                        ^ ??

>IDE drive ...

>What are the settings to use for the BIOS? (Cyl, sector etc...)
>--
>Douglas L.Acker                Western Geophysical Exploration Products
>____    ____     ____          a division of Western Atlas International Inc.
>\   \  /   /\   /   /\         A Litton / Dresser Company
> \   \/   /  \ /   /  \        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>  \  /   / \  /   /\   \       Internet  :  acker@wg2.waii.com
>   \/___/   \/___/  \___\      Voice     :  (713) 964-6128

Rodime R03259A:
Cyl: 990
Heads: 15
Sec/trk: 28
Formatted capacity  213M

Darmawan
dlg6627@uxa.cso.uiuc.edu
Newsgroups: comp.sys.ibm.pc.hardware
From: rjones@magnus.acs.ohio-state.edu (Ronald Jones)
Subject: Making a switch for tape backup unit!
Organization: The Ohio State University
Date: Fri, 1 Jan 1993 21:30:06 GMT

OK, I've discovered that my tape backup unit won't let me connect it in 
parrallel with two floppy disk drives.  I am now considering using an 
external mechanical switch to manually select between one of the 
floppy drives and the tape unit.  

I suppose I could leave the tape power connection on all the time and 
use a  double throw, multi-pole switch on the control lines to select
between the floppy and the tape unit.  My question is what is the 
minimum number of lines (and which ones) would I need to switch.  Not
all 34 I hope!  Has anyone tried this?  

-- 
 < Ron Jones                   |    E-mail:       rj+@osu.edu   > 
 < The Ohio State University   |    Office:      (614) 292-1665 >
 < 338 West Tenth Avenue       |    FAX:(9-5PM)  (614) 292-7151 > 
 < Columbus, Ohio 43210        |        "eschew obfuscation"    >
From: teoman@hardy.u.washington.edu (Teoman Smith)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Looking to buy two 486's
Date: 30 Dec 92 20:39:42 GMT
Article-I.D.: shelley.1ht1eeINN54d
Reply-To: teoman@u.washington.edu
Distribution: world
Organization: University of Washington, Seattle
NNTP-Posting-Host: hardy.u.washington.edu

I am buying two 486's for a professor at my department and
I have been reading through bunch of magazines to find out
what is a good system, but of course my main concern is
to find a company that is helpful in technical support, since
in the future my prof. is going to deal with it...

Several questions I have:
1) Is Leading Edge D4DX2/50 a good system?
   So far the price: $2400 
   80486DX2 32-bit/50MHz, 8M ram
   64K cache, 213M IDE hard drive, SVGA w/ .28 dot pitch, 1M video mem.
  
2) We want basically around 8M ram, about 150M hard drive, .28dot pitch
   SVGA monitor...

3) Reading the posts on Gateway, I see some like it, some don't... Do
   you think this a good buy? and how about their tech support?

If you can help me out with buying this computer, can you email me
at teoman@u.washington.edu? This was the first time I read this bulletin
board and there's too much info to go through the last 700 posts with
searches on gateway, dec, ibm ps/1 and sofort...

Thanks
Teoman Smith
University of Washington Mech. Eng. Dept. 
email: teoman@u.washington.edu
From: ebrown@bud_light.kodak.com (Eric Brown)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Best 16-17" 1280x1024 NI monitor?
Date: 22 Dec 92 18:43:38 GMT
Reply-To: ebrown@tap.kodak.com
Organization: Eastman Kodak Company

What is the best 16" or 17" 1280x1024 NI monitor?
I'm currently considering the Mag 17" and Viewsonic 17",
but heard that Nanno is pretty good. Any suggestions?

Thanks, Eric.
ebrown@tap.kodak.com
--
From: v923137@vms.ucc.okstate.edu
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Diamond Speedstar 24X vs. Stealth VRAM
Date: 23 Dec 92 22:27:18 GMT
Distribution: usa
Organization: Oklahoma State University Computer Center

In article <1992Dec23.163529.16478@zeos.com>, jre@zeos.com (Jim Erickson) writes:
> In article <1992Dec20.212014.1@vms.ucc.okstate.edu> v923137@vms.ucc.okstate.edu writes:
>>In article <1992Dec18.023210.9407@csar.encore.com>, mthompso@csar.encore.com (Mark Thompson) writes:
>>> mrbill@leland.Stanford.EDU (William Bowen) writes:
>>> 
>>>>Which is the faster card, the Stealth VRAM or the Speedstar 24X? Does
>>>>anyone have benchmarks for these cards, preferably run on the same machine?
>>> 
>>>>Thanks for any info.
>>> 
>>>>Bill
>>> 
>>>>mrbill@leland.stanford.edu
>>> 
>>> I just installed a SpeedStar 24X in my 486DX/50 MHz 256kb cache 8MB ram
>>> system. WinBench reports 12,691,779 WinMarks in 800x600x256 mode. Sorry, I
>>> don't have any numbers on the Stealth. Maybe someone else with a similiar
>>> system can post them.
>>
>>The Diamond Stealth VRAM 1MB accelerator card runs about 8.4 Million WinMarks.
>>I had a Stealth, and just bought a 24X.  The 24X is faster.  Period. 
>                                                               ^^^^^^
> Not "Period". The 24X is definitely faster in standard DOS text and VGA 
> applications but the Windows
> performance of the two cards is very similar. One advantage the Stealth has is

?
Ok, so if the 24X is ABSOLUTELY faster in *most* DOS applications, and lets say
the they are the same in Windows, which is the faster card?  The 24X I believe.

> that it has line draw fuctions in hardware, the 24X does not. This means, given
> the correct drivers, that even some DOS based apps (i.e. CAD) may have better
> performance with the Stealth. 

Perhaps, but the Stealth (in my opinion) is such a dog in DOS apps that I run
that the 24X was a WELCOME addition to my computer.

> I personally would pick the 24X, but the issue is not cut and dry. 

No, it's not cut-and-dry.  However, for users that do equal amounts of 
DOS/Windows apps, or perhaps more DOS than Windows, then the 24X is the logical
choice (which you have stated), and I think that it cut and dry.

-Jason Worley
From: copernicus@digund.uucp (Copernicus) 
Newsgroups: comp.sys.ibm.pc.hardware
Subject: EISA/VESA local bus syste
Date: 28 Dec 92 20:20:00 GMT
Distribution: world
Organization: Digital Underground - PRIVATE
Reply-To: copernicus@digund.uucp (Copernicus) 

To: tn0s+@andrew.cmu.edu

TLN>Hi all,

TLN>I going to buy a 486DX/33 or 486DX2/66 in the near future.  I've seen
   >systems with VESA local bus slots or EISA bus or both.  Needless to say,
   >I know very little about local bus or EISA.  It's my understanding that
   >local bus is good for video cards and EISA is good for with hard drives
   >/ ethernet cards / modems / cd-rom / etc.  What exactly are local bus
   >and EISA?

TLN>I plan to run Windows3.1 and Linux, a free unix clone.  What kind of
   >performance gain will I get with EISA, and more importantly, is EISA
   >worth the extra money?

TLN>Also, are there any problems with having both EISA and local-bus on the
   >same system?


Hello.. I am basically in the indentical arena.  I would appreciate it
if you could please forward any replies you get to this query.

Thank you.

I am on the virge (sp?) to buy a 486DX/33 VLB/Eisa.  Upgrading from
my 4 year old 286.

Chris Nalley
copernicus@digund.uucp
---
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