Linux-Hardware Digest #467, Volume #10 Fri, 11 Jun 99 17:14:24 EDT
Contents:
Re: Exabyte 8500XL freezes my system! (Jim Smith)
Re: ATI 3D Rage LT Pro, 2x AGP (Mathias Puetz)
Re: Cipher M990 9-track 1/2-inch Tape drive with Pertec interface and ISA card (Mark
Droog)
Re: HP 720C doesn't print ("Duncan Hurwood")
Matrox Millenium II and XF86 probs (Kevin)
Re: Celeron or PII? (bryan)
Mach64 and Inspiron 7000 help needed (Eric Jensen)
Re: SupraExpress 56i modem driver? ("Rui Soutelino")
Re: Graphic Card : ATI Expert 98 (David J. Roberts)
Platform Recommendation (Luke Bakken)
Re: DVD-ROM worked with RH5.2, but not 6.0. HELP!! (Mathias Puetz)
Iomega Ditto drive (David McMullen)
Re: My dream computer (Mike Frisch)
Re: Question installing SCSI drivers for initio (Sonu)
Re: Multiple SCSI controllers ? ([EMAIL PROTECTED])
Re: How do I use an on-board NIC? ("LHD Administrator")
sig 11 (was Re: Linux program to exercise Dual-CPU system?) (Scott Mark)
Re: DVD-RAM anybody? (Yasuyuki Saito)
Re: Searching: SMP Machines with many CPUS (Mathias Puetz)
Re: SupraExpress 56i modem driver? (Leejay Wu)
----------------------------------------------------------------------------
From: Jim Smith <[EMAIL PROTECTED]>
Subject: Re: Exabyte 8500XL freezes my system!
Date: Fri, 11 Jun 1999 12:34:16 -0500
[EMAIL PROTECTED] wrote:
> Hello,
>
> I have an Exabyte 8500XL attached to my linux box with an old adaptec
> 1502 scsi board.
>
> I have a problem with my backups. Quite often, will backuping, my system
> freezes and I have to power off. I found no message in my logs.
>
> I have the feeling that it occurs when the amount of data to save is
> large, but I cannot quantify this. The problem showed with tar and with
> dump. Any idea ?
>
> In addition, my tape drive already broke several tapes by crumpling
> them. What is the reason for this ? Should I try to clean the drive ?
>
> Thanks for any help,
>
> Christophe
>
> Sent via Deja.com http://www.deja.com/
> Share what you know. Learn what you don't.
I had a similar problem with my exabyte 8500. I had an ncr host with
devices connected on the internal 50 pin AND a disk on the external cable.
It work great for the disks and cdrom, but when I added the exabyte
(internal and not at the end of the internal cable so termination is the
same) I'd often get 1-2 gigs out then lockup. When I added a second
controller with a termination block, for the exabyte only it worked great.
I th ink the exabyte was just very sensitive to the termination. I've put
out 4 large (~3.5 gig) data sets since. They look good. The best I can
suggest is to check your termination.
Jim
------------------------------
From: Mathias Puetz <[EMAIL PROTECTED]>
Subject: Re: ATI 3D Rage LT Pro, 2x AGP
Date: Fri, 11 Jun 1999 11:42:46 +0000
[EMAIL PROTECTED] wrote:
>
> Hi,
>
> I have a MiTac MiNote 6020 with an ATI Rage LT Pro graphics chip (8MB,
> 14.1", 1024x768).
>
> ? http://www.fachschaften.uni-bielefeld.de/physik/leute/marc/X/
> ? http://www.eecs.umich.edu/~steveh/inspiron/
> ? http://www.uno.edu/~adamico/banshee/
>
> My first attempt was to (using only S.u.S.E. supplied code) compile a
> new kernel and set up a frame buffer device (XF86_FBDev). This was, for
> me, a bad idea. It seemed straight forward, but . I missed something.
You must not compile in the ATI Mach framebuffer support of the
Kernel 2.2 but rather use the VESA framebuffer support.
If I did the first on my Compaq Pres. 1675 the kernel locked
up at boot time, but the VESA support did the trick for
me together with the standard XFree86 3.3.3.1 server.
Thus I wonder if you had fallen into the same trap as I did.
Greets,
Mathias
--
===========================================================
Mathias Puetz
Advanced Materials Lab / University of New Mexico
1001 University SE, Albuquerque, NM 87106
===========================================================
phone: (505)272-7130 + email: [EMAIL PROTECTED]
===========================================================
------------------------------
From: Mark Droog <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup
Subject: Re: Cipher M990 9-track 1/2-inch Tape drive with Pertec interface and ISA card
Date: 10 Jun 1999 20:31:21 GMT
Jeffrey A. Jordan wrote:
>
> I have a Cipher M990 9-track 1/2-inch tape drive with a Pertec interface
and
> the ISA card that I would like to get to run under Linux. One of the
guys
> here seems to think he has the DOS device drivers, but has yet to find
them.
> The ISA card really does not have much info on it except:
>
> 1986 I.D.B. Corp
>
> If anyone has any info on how to get this to work with Linux, please
e-mail
> me directly.
> Thank you.
>
> Jeffrey Jordan
> [EMAIL PROTECTED]
>
>
Have you tried converting the tapedrive from pertec to scsi?
check out this site for more info:
http://www.avax.com/avax/avaxprot.html#8844
Regards,
Mark Droog
================== Posted via SearchLinux ==================
http://www.searchlinux.com
------------------------------
From: "Duncan Hurwood" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup,nl.comp.os.linux.installatie
Subject: Re: HP 720C doesn't print
Date: Fri, 11 Jun 1999 19:30:56 +0100
I don't know how close a HP 895Cxi is to a 720 - I thought they were almost
identical, except in price :) - but I can get *some* output from SuSE 6.1 to
my 895, by using /dev/lp0. I set the YaST to hpdjcolour, if that helps. It's
not brilliant, though. If anyone's got SuSE 6.1, and an HP895, with good
quality output, maybe they could elaborate on how this works. And as for
'parport'... well, I'm sure it'll make sense in the end.
Duncan Hurwood.
Marc Mutz <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]...
> root wrote:
> >
> > Dear reader,
> >
> > I've a HP 720C colour deskjet and I have SuSE 6.1 runing on my computer.
> > During instalation of the OS I had to choose a printer. Because HP 720C
> > isn't on the list, I've tried other printers (like cdjet550) on /dev/lp0
> > but neither will print.
> >
> > The solution may be quite simple (I hope so) but being a newbie, things
> > are not that easy to me
> >
> Try /dev/lp1 instead of /dev/lp0. It works for me...
>
> Marc
>
> and don't post to so many ng's
------------------------------
From: [EMAIL PROTECTED] (Kevin)
Subject: Matrox Millenium II and XF86 probs
Date: Thu, 10 Jun 1999 20:25:28 GMT
Reply-To: [EMAIL PROTECTED]
Hi All,
Cant get my slackware 3.5 linux to run my Matrox Mullenium II card at
1280 * 1024, at any colour depth, My monitor (a Iiyama Vision Master
Pro 17") complains about the speed of something or other then shuts
down
I have the same problems whether I use XF86Setup of xf86config.
I looked at the XF86Config file, but dont realy understand what I'm
looking at,
Any help would be much appreciated.
Kevin.
[EMAIL PROTECTED]
^ ^ ^ , , ^ ^ ^
/ \ \ \0 0/ / / \ What, No Sig ?
_/_/_/ ^ \_\_\_
------------------------------
From: bryan <[EMAIL PROTECTED]>
Subject: Re: Celeron or PII?
Date: Thu, 10 Jun 1999 20:38:17 GMT
Vaisbrot <[EMAIL PROTECTED]> wrote:
: bryan <[EMAIL PROTECTED]> wrote:
: > I used to believe this myself. I really did. I used to believe that
: > you should always 'blindly follow the specs'. but in the case of the
: > celeron, you -are- following the specs - sort of. the cpu is the same
: > basic part they use in the p2-450 - it just has a different cache part
: > inside. and that cache part can usually work very well at 450.
: >
: > raising the voltage from 2.0 to 2.2 is 10%. that's the margin that's
: > allowed by the specs, too, I believe. and almost no celeron won't o/c
: > at 2.2 v.
: >
: Hi,
: I saw somewhere than because of Linux's better (i.e. complete) usage of
: the CPU, it was tricky to overclock it, whichever the CPU model may be.
in fact, just the opposite, imho. its known that linux heats cpu's up
less when the system isn't running at full 100% util. linux executes
the HALT instr which saves energy. 'doze, otoh, is ALWAYS in a busy
loop and generates more heat just doing nothing (being idle).
: I've got a 433 Mhz Celeron with a fan on a 66 Mhz bus (6.5 * 66 = 433).
: My motherboard can go up to 8*66 (can't change the bus frequency).
the only way to o/c a multiplier-locked cel is to raise the bus freq.
: Do you mean that if I o/c my CPU to 500 MHz (7.5*66), it will work
: without overheating with Linux too ?
see above.
--
Bryan [at] Grateful.Net
http://www.Grateful.Net
------------------------------
Date: Thu, 10 Jun 1999 16:43:09 -0400
From: Eric Jensen <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.x
Subject: Mach64 and Inspiron 7000 help needed
I'm tring to get A new Inspiron 7000 with a Rage LT PRO to work under
Redhat 6.0.
I've gone to the Laptop page and tried a few things and also prowled
Deja news. I sounds like the Framebuffer option might be best. Someone
indicated using XF86_FBD with success. I really have no idea how to get
this to work, and I would prefer not to have to build a new kernel.
Anyone done this? Thanks!
Eric
------------------------------
From: "Rui Soutelino" <[EMAIL PROTECTED]>
Subject: Re: SupraExpress 56i modem driver?
Date: Fri, 11 Jun 1999 08:30:45 +0100
I've got the same problem, but I still believe it will work because when I
try it in win98 appeared in a window on control panel a message like "to use
this modem in DOS use the following settings .... " witch were different
from the settings on win, my question is:
if it can work in DOS, is it a Winmodem?
And by the way it has two nice Chips from Rockwell, this means anything?
If anyone has any clue about it please post it, please.
Rob Clark wrote in message ...
>In article <7japot$3ie$[EMAIL PROTECTED]>,
>David Rais <[EMAIL PROTECTED]> wrote:
>>I have problem with instalation of SupraExpress 56i internal pci modem. My
>>RedHat 5.1 distribution seems not to support it. Could you help me finding
>>the right driver or give a good advice?
>
>It's probably a Windows-only software modem. Please check the table at:
> http://www.o2.net/~gromitkc/winmodem.html
>in the Diamond Multimedia section to see if it's listed.
>
>Rob Clark, [EMAIL PROTECTED]
>
------------------------------
From: [EMAIL PROTECTED] (David J. Roberts)
Crossposted-To: aus.computers.linux,comp.os.linux.setup
Subject: Re: Graphic Card : ATI Expert 98
Date: 11 Jun 1999 13:43:47 -0400
I have my ATI Exper 98 PCI with 8MB working at a color depth of 16 and
resolution of 1280x1024. My entry in XF86Config follows:
# 1280x1024 @ 70.42 Hz, 81.13 kHz hsync
Modeline "1280x1024" 135 1280 1368 1472 1664 1024 1055 1058 1152
Of course your mileage will vary with the terminal you have. The
utility xvidtune is very handy in working out these settings.
--David Roberts
"James Kosin" <[EMAIL PROTECTED]> writes:
> Dear All,
>
> I got mine to work properly by not allowing the driver to probe how much
> memory I have onboard. That seemed to do the trick.
>
> Thanks,
> James Kosin
>
> James Kosin <[EMAIL PROTECTED]> wrote in message
> news:u8mwLXhs#[EMAIL PROTECTED]...
> > Dear Funman,
> >
> > I have the ATI Expert 98 PCI version with 8MB. So far I can only get it
> to
> > work in 640x480 16color...
> > I had it sortof working when I tried it with my settings for the ATI PC2TV
> > Turbo Pro [my old card].
> >
> > Let me know what you find out.
> > I'm still trying as well.
> >
> > Thanks,
> > James Kosin
> >
> > Funman <[EMAIL PROTECTED]> wrote in message
> > news:7i8290$ip3$[EMAIL PROTECTED]...
> > > I have an ATI Expert 98 AGP Graphic card with 8MB but unfortunately
> could
> > > not get configured right.
> > >
> > > I wonder anyone out there might be using the same card knows how.. I am
> > > using a Philips 107S 17" monitor.
> > >
> > >
> > >
> > >
> >
> >
------------------------------
From: Luke Bakken <[EMAIL PROTECTED]>
Subject: Platform Recommendation
Date: Thu, 10 Jun 1999 19:01:27 GMT
Not to start a flame war, but......
I currently own a PC with an AMD K6 on board. I use Linux on it for
everything but games (tho I've heard GL support is better with Linux
now - I've been out of the loop for a while) and Windows for the games.
Before this machine I had a PowerPC 6100 with MkLinux on it. This fall
I want to get a enw machine, but am stuck on deciding between getting a
PowerPC based machine or one with an AMD K7 in it. I'm interested in
experiences of those with PowerPC machines and Linux. Also for gamers
out there who have experience with both platforms, which would you
recommend? (I think I pretty much know the answer to that one). I
normally only play games along the lines of Quake and Half-Life, i.e.
first-person types. Also, ease-of-use is not an issue since I am
thoroughly familiar with each kind of system. I'm just looking for
positives and negatives to each platform.
Thanks for any advice,
Luke
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
------------------------------
From: Mathias Puetz <[EMAIL PROTECTED]>
Subject: Re: DVD-ROM worked with RH5.2, but not 6.0. HELP!!
Date: Fri, 11 Jun 1999 12:32:02 +0000
Richard Hughes wrote:
>
> I recently installed RedHat 6.0 on my system (acutally, Linux-Mandrake). I have
> a 3rd gen Sony DVD-ROM that used to work as an ATAPI CD-ROM in RH 5.2, but it
> no longer works in RH6.0. I get the error "/dev/cdrom is not a valid block
> device". I have all the filesystems I should need compiled into my kernel
> (2.2.9). I used the DVD-ROM to perform the install, and it stopped working as
> soon as the kernel booted for the first time. I'd really like to be able to
> access my CD's again. If someone could help me out, I'd really appreciate it.
> Thank you.
Not sure what it is, could be several reasons.
Try the following
- type dmesg | more as root to see the messages of your boot up.
- verify that your DVD was recognized as a CDROM
- if it was recognized remember the device number given to it
(if you have one hd only it's usually /dev/hdc )
- insert a cd and try to mount the cd manually
mount -t iso9660 /dev/hdc /mnt/cdrom
(replace /dev/hdc with whatever you found in dmesg)
If that does the job everything is allright (as it should be)
an redhat did something wrong setting up the correct links.
Send a bug-report to RedHat on this.
Edit your /etc/fstab and replace the entry /dev/cdrom with /dev/hdc
You can then mount your cds normally with mount /mnt/cdrom
Other than that, try building your own custom kernel. The redhat
standard kernel locked up on my laptop and I had to rebuild my
own to get it to work. Things are not failsafe and people make
mistakes.
Hope that's it,
Mathias
--
===========================================================
Mathias Puetz
Advanced Materials Lab / University of New Mexico
1001 University SE, Albuquerque, NM 87106
===========================================================
phone: (505)272-7130 + email: [EMAIL PROTECTED]
===========================================================
------------------------------
From: David McMullen <[EMAIL PROTECTED]>
Subject: Iomega Ditto drive
Date: Thu, 10 Jun 1999 16:12:21 -0500
Is anyone using an Iomega Ditto drive for tape backup? If so, do tell
how!
davidmac
------------------------------
From: [EMAIL PROTECTED] (Mike Frisch)
Subject: Re: My dream computer
Date: 10 Jun 1999 20:01:53 GMT
On Thu, 10 Jun 1999 11:23:03 -0700, Gerald Willmann
<[EMAIL PROTECTED]> wrote:
>> > > 128MB SDRAM (PC-100)
> get parity ECC RAM
For a desktop machine? It's overkill and an unnecessary extra expense,
not to mention the slight performance you'd take for having it. RAM is
far more reliable today that it was years ago and the need for ECC RAM is
not as essential as it once was. If I were building a server, I can see
using it, but not for a desktop.
> never understood what's the
>advantage of fast CDroms - like my music played at 1x speed :)
>you should consider going SCSI, though, for such a machine
Do you not realize that CD-ROMs hold data as well and accessing them at 1x
(150kb/s) is sometimes painful?
SCSI would effectively double the cost of the machine for what benefit?
Once again, this is a desktop, not a server. (Yes, I fully understand the
difference between IDE and SCSI and have both IDE and SCSI machines at
home).
Mike.
--
======================================================================
Mike Frisch Email: [EMAIL PROTECTED]
Northstar Technologies WWW: http://saturn.tlug.org/~mfrisch
Newmarket, Ontario, CANADA
======================================================================
------------------------------
From: Sonu <[EMAIL PROTECTED]>
Subject: Re: Question installing SCSI drivers for initio
Date: Thu, 10 Jun 1999 15:21:29 -0600
The only thing SCSI in my machine is my CDRom drive....
Rod Roark wrote:
> Sonu Sahi <[EMAIL PROTECTED]> wrote:
> > At least you guys were able to get Linux up and running in the first
> >place! I have the Initio INI-9100AS card, it came with my Sony cd burner.
> >I havent had a problem with it until trying to install Linux off a cd-rom.
> >I burned the .iso of Mandrake Linux v5.3 (which is basically redhad 5.2 i
> >believe). The Initio stuff is not in the list of possible SCSI cards in
> >mandrake's install. So basically, my problem is that i cant get mandrake to
> >recognize my scsi card, which in turn would enable to me to actually perform
> >the installation of linux off the cdrom.
> >
> > I know there have been similar discussions in other threads, but the
> >difference is that the people in the other threads already had linux
> >installed... i've never used linux in my life and want to learn more about
> >it, but i need to be able to install it first :) Any advice is
> >appreciated, thanks.
>
> I'm not sure if it fits Mandrake, but Initio does have installation
> help for Red Hat 6.0. Go to www.initio.com, look up the Linux stuff,
> download the file for your card, unzip it and do whatever the docs say.
>
> Another option: temporarily put in an IDE drive, install to it, compile
> and install a kernel with Initio support, and then copy the whole mess
> to a new root partition on your SCSI drive.
>
> The details are left as an exercise; presumably you have a good Linux
> book. :-)
>
> -- Rod
> ----------------------------------------------------------------------
> Sunset Systems Preconfigured Linux Computers
> http://www.sunsetsystems.com/ and Custom Software
> ----------------------------------------------------------------------
------------------------------
From: [EMAIL PROTECTED]
Subject: Re: Multiple SCSI controllers ?
Date: Fri, 11 Jun 1999 18:15:18 GMT
In article <7jqko2$beo$[EMAIL PROTECTED]>,
[EMAIL PROTECTED] wrote:
> Hi,
>
> Hardware config,
> IBM 770X Thinkpad
> SelectaDock III docking station incl AHA-2940(I think) SCSI Controller
> 2GB Jazz Drive attahced to above
>
> The above config works fine. I have the SCSI drivers compiled into the
> kernel and it works great.
>
> However, I now want to use an additional SCSI controller a 1480A
> CardBus controller, in one of the PC slots of the laptop. I've
> installed and configured the latest version of the pcmcia modules. But
> when I insert the 1480A all sorts of shit happens. But the key things
> are the cardmgr finds two scsi busses. scsi1 and scsi2, this is in
> addition to the existing scsi0. It appears that that it has found the
> 2940 again and is assigning it to scsi2 as well as scsi0.
What is it that leads you to believe that it's assigning SCSI2 to the
2940?
Greg
>
> Does this sound normal ?
>
> Dobbin
>
> Sent via Deja.com http://www.deja.com/
> Share what you know. Learn what you don't.
>
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
------------------------------
From: "LHD Administrator" <[EMAIL PROTECTED]>
Subject: Re: How do I use an on-board NIC?
Date: Fri, 11 Jun 1999 15:50:41 -0400
What brand is it? (Try to get the chip markings as well as other info).
What brand computer is it?
You could also try autoprobing for it (see Ethernet HOWTO), but it maybe
quicker to just look it up.
GTE News wrote in message ...
>I just got an el-cheap-o PC. It seems to have everything build onto the
>motherboard, including the NIC. It works fine with Win98, but how can I
get
>Linux to see the NIC? It's not any brand listed in the list of Linux NICs
>supported by the kernel. Do I need to use "ifconfig" and give the i/o
>address, irq, hardware address, and stuff like that?
>
>Thanks
>[EMAIL PROTECTED]
>
>
>
------------------------------
From: [EMAIL PROTECTED] (Scott Mark)
Subject: sig 11 (was Re: Linux program to exercise Dual-CPU system?)
Date: Wed, 9 Jun 1999 16:35:18 GMT
As a followup to all my postings about SMP and Linux and sig-11 problems
and not being able to duplicate them:
I think that the overall problem was/is the sound driver in kernel version
2.0.32, which is what I'm currently running in SMP mode.
I can positively crush my system with compiles, matrix math, busy loops,
and even the dreaded Netscape, and I don't have problems. I've reinstalled
all my DRAM and turned the cache on and I've done over 100 kernel compiles
without a single fatal error.
I got the hunch when the "play" program (plays .wav files) locked up
the whole system, when I was using that instead of amp to have some
tunes while the system chugged.
So now that I'm not using any sounds whatsoever, the whole system is
rock solid again, even though my CPUs don't exactly match and I don't
have the updated 2.2 kernel.
Many thanks for all the pointers, ideas, and tips during this time.
I've learned a lot about the system, and a lot about trying to get to
a motherboard that is obscured by hard drives and cables.
My next PC is going to be in a full tower case.
Thanks again!
Scott Mark
[EMAIL PROTECTED]
------------------------------
From: Yasuyuki Saito <[EMAIL PROTECTED]>
Subject: Re: DVD-RAM anybody?
Date: 11 Jun 1999 19:34:01 GMT
Hello.
In article <7j76jk$[EMAIL PROTECTED]> at comp.os.linux.hardware
"Jun Yang" wrote:
‖Is DVD-RAM supported on Linux? I can't find it in the HOWTOs.
I use LF-D100J which is a products of Panasonic. I can
use ext2 format and UDF format as a HDD. If you wish use
DVD-RAM, please refer my web page:
http://www.jaist.ac.jp/~sight95/linux/dvd-ram/dvd-ram-english.html
And, I wrote about GF-1050 (Hitachi) in this page.
--
School of Information Science
JAIST, Japan Advanced Institute of Science and Technology
Address: 1-1 Asahidai Tatsunokuchi Nomi Ishikawa, 923-1292, JAPAN
E-mail: [EMAIL PROTECTED] Yasuyuki Saito
------------------------------
From: Mathias Puetz <[EMAIL PROTECTED]>
Subject: Re: Searching: SMP Machines with many CPUS
Date: Fri, 11 Jun 1999 13:22:57 +0000
Johannes Nix wrote:
>
> I am working on digital signal processing algorithms for speech
> processing. Until now, we have done this mostly on DSP systems, but
> hardware is costly, gets every year more complicated and is outdated
> rapidly. Also, libraries are often buggy and porting DSP code is as
> much work as developing it new - this costs often ten or twenty times
> more work than developing under UNIX. (Compared to DSP development,
> writing a multithreaded C Program is a easy game!)
>
> So I am considering to do the development on Pentium or Alpha
> SMP systems.
>
> I have tested a convolution algorithm on a Dual Pentium II 450 MHz and
> it seems to give about 160 Million Multiply-and-Adds per second,
> included piping and buffering the data, with simple multithreaded C
> code.
>
> It would be critical for us to have as many CPUs avaiable as possible;
> our aim is to have about 1GFLOPS computing power. I think a cluster
> would not be the best solution because a quite high bandwidth is
> needed also.
Well, not neccesarily. There is other interconnect hardware
than plain Fast Ethernet or even Gigabit Ethernet.
The problem is usually
not the bandwidth, but rather the latency time. Ethernet performs
poorly with about 1 ms latency.
We are currently building a cluster with 4 dual PC nodes with
SCI interconnect cards which come with a very fast (about 3
micro secs. latency) MPI library. The cards are a bit pricey
(about $1000 including drivers), but are doing a very nice job
for our very communication intensive molecular dynamics codes.
You can obtain these cards with Linux driver and MPI library
from www.dolphinics.com.
The University of Padernborn has build a supercomputer with
192 CPUs with these cards. Have a look at
http://www.uni-paderborn.de/pc2/services/systems/sci/
>
> - Does anybody knows about SMP Systems with more than four
> processors ? (Linux does support up to 16 Processors.)
Currently, Intel is producing some (extremely expensive > $3000)
motherboards which support 4 CPU SMP (PII and PII xeon). It
might be hard finding a dealer who just sells the boards.
Complete systems are available from Siemens (I think).
But I can assure you, that for digital signal processing
the Alpha Platform is more suitable because the Alpha chip
has much more powerful memory interface. Since most of what
you will be doing is perform simple floating point operations
on huge sets of data, memory access will be the limiting factor
(unless your data sets fit into a 512kb cache).
On huge data sets you can expect at least a factor of 2
on an Alpha compared to a PII/III at same clock speed.
Thus you might easily get the 1 GFLOPS on a double CPU
Alpha 21264 system (maybe even on a single CPU).
One has to be careful though, the Personal Workstations from Digital
are not much better than Intel PCs since they have a very low
cost memory design.
>
> - Does anybody has an example on how to call Fortran-style BLAS
> libraries from C? (There are some Pentium optimized BLAS Libraries).
This is actually fairly simple.
FORTRAN always makes calls by reference, i.e. you have to
use pointers in C to call Fortran functions.
Example:
SUBROUTINE scalarproduct ( x,y,n,stride,result)
REAL x(n),y(n),result
INTEGER n,stride
result = 0.0
DO i=1,n/stride
prod = prod + x(i*stride)*y(i*stride)
END DO
END SUB
In C you define a prototype like this
extern scalarproduct (double x[],double y[],int *n,int *stride,double
*result);
and use it like this
double x[100],y[100],result;
int n = 100, stride = 2;
scalarproduct(x,y,&n,&stride,&result);
NOTE: somtimes your fortran compiler converts Symbolnames
to lower/upper case and pre- orappends an _ to it
you have to use these symbolnames in your prootype
definition, so the linker can find the mathcing entry
in the library.
>
> - Do there exist anywhere free or commercial libraries with Pentium
> III optimized BLAS and/or Vector math code for Linux/UNIX ?
Not to my knowledge, I don't know any (not even commercial) compilers
which support PIII optimization, and I bet it will take at least
another year before the first will be available.
>
> - Which speed may be achieved with Alpha SMP Systems now? I would
> like to know a concrete example. I got the information that gcc still
> does not give very fast code on Alphas, and fast math libraries are
> lacking, are there alternatives?
I don't have experience with Linux/GCC/Alpha but DEC/GCC/Alpha which
doesn't make much difference.
A code which doesn't use specific math libs (optimized by DEC/Compaq)
gcc-code usually gets about 80-90 % of the performance of the
(very good) DEC C-Compiler in floating point intensive applications.
In Integer intensive apps, I don't see much of a difference.
Hope this gave some hints,
Mathias
--
===========================================================
Mathias Puetz
Advanced Materials Lab / University of New Mexico
1001 University SE, Albuquerque, NM 87106
===========================================================
phone: (505)272-7130 + email: [EMAIL PROTECTED]
===========================================================
------------------------------
From: Leejay Wu <[EMAIL PROTECTED]>
Subject: Re: SupraExpress 56i modem driver?
Date: Fri, 11 Jun 1999 15:58:14 -0400
Excerpts from netnews.comp.os.linux.hardware: 11-Jun-99 Re: SupraExpress
56i modem .. by "Rui Soutelino"@hotmail.
> I've got the same problem, but I still believe it will work because when I
> try it in win98 appeared in a window on control panel a message like "to use
> this modem in DOS use the following settings .... " witch were different
> from the settings on win, my question is:
> if it can work in DOS, is it a Winmodem?
Well, er, is that with drivers or without? If it works in pure DOS w/o any
drivers, then it shouldn't be, since DOS presumably doesn't have such built
into it.
If it requires a special driver (unlike actual hw modems), then there's a
problem.
> And by the way it has two nice Chips from Rockwell, this means anything?
> If anyone has any clue about it please post it, please.
...Rockwell Semiconductor Systems, now Conexant? That would depend on
which chipset -- there's quite a few, it seems.
For instance:
a HSF PCI modem chip + smartDAA, labelled 11242 and 20434
ditto, but HCF: P95, 20434
Both seem to be software modems; HCF = Host Controlled Family,
HSF (Conexant software modem? Lower chip count, apparently).
There's also references to SocketModems, with the claim that they
"perform all modem functions on-board". These appear to be meant for OEMs
to pick a package of features and build 'round 'em. For the 56k arena,
there's the SFV56ACF and SFV56ACL TTL pinout diags online. If that's what
you have, it may work...
There's an HCF/SoftK56 MonoPak, that (judging only from the text, as I did
not find pin-out diags etc), features two chips on a single 144-pin
device.
Glance at the chips. Ya might get lucky and find a number which is
actually in their (searchable) set of pages.
--
| [EMAIL PROTECTED] | the silly student |
|--------------------------| he writes really bad haiku |
| #include <stddiscl.h> | readers all go mad |
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