For anyone that is interested I can sell them a 600mhz box with 133mhz bus
for equal or less money than what they are buying the National for. I spent
alot of time and money working with the Geode solution and ended up having
my own manufacturer in Taiwan.
Regards,
David George
CEO and Founder
ResidentialGW.com Inc.
http://www.residentialgw.com
Enabling the Delivery of
" BroadBand Entertainment Services "
----- Original Message -----
From: "Matt Linehan" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, June 20, 2001 8:13 AM
Subject: Re: linux w/ National Geode board
> I've heard that the national geode processors (previously Cyrix MediaGX
> processors) have a bug in the TSC making them unusable for a real time
> enhanced linux.
>
> Can anyone confirm or deny the usability of the National Geode
> processors with linux in general? What about Real Time Enhanced linuxen?
> Have the TSC issues been resolved? Being a linux newbie, I shied away
> from this processor. I'm having enough troubles converting from a win32
> word to a unixen world as it is. :-)
>
> Quoting: http://www.realtimelinux.org/archives/rtl/20002/0078.html
> >
> > Re: [rtl] Cyrix MediaGXm
> >
> >
> >
> > Subject: Re: [rtl] Cyrix MediaGXm
> > From: Kulwinder Atwal ([EMAIL PROTECTED])
> > Date: Thu Feb 10 2000 - 04:37:02 EST
> >
> > sorted by: [ date ] [ thread ] [ subject ] [ author ]
> > Next message: mestrole: "[rtl] date and hour"
> > Previous message: R. Basham: "[rtl] Sorry"
> > In reply to: Yutarou Ebihara: "[rtl] Cyrix MediaGXm"
> > Reply: Kulwinder Atwal: "Re: [rtl] Cyrix MediaGXm"
> >
> >
> >
> > The problem is that the Cyrix MediaGX has a fault in the TSC hardware.
> > The TSC on the MediaGX does not work correctly all of the time. This is
> > the reason the TSC is disabled in the Linux code. When X86_FEATURE_TSC
> > is disabled Linux will compile for i486. I suspect what you are
> > observing is the faulty TSC. If you really need the TSC then you have a
> > problem. The MediaGX pins are not compatible with Intel or AMD CPUs.
> > This means if you want to change to a AMD or Intel CPU to get a working
> > TSC, you will also have to change to a SBC board that works with AMD and
> > Intel CPUs.
> >
> > - Kal.
> >
> > Yutarou Ebihara wrote:
> > >
> > > Hello,
> > >
> > > i am from japan, and i hope that you can read my english.
> > > i am going to use rtlinux2.0-linux2.2.13. on embbeded pc
> > > ADVANTECH PCM-5820
> > > http://www.advantech.com/products/sbc/pcm-5820.htm
> > > it has a CyrixMediaGXm processor.
> > >
> > > a few days ago, i ran a small test program on this PC.
> > > the test is very simple, just null rt-task was runnig.
> > > rt_task_wait is 5ms. and this morning, linux was dead.
> > > (no keyboard response,no ping-answer,no ctrl-alt-del operation)
> > >
> > > i think this problem caused by these three reasons.
> > >
> > > 1) hardware trouble (over-heat? disk error?)
> > > 2) MediaGX's TSC trouble
> > > 3) gcc (2.95.2)
> > >
> > > i don't analize reason1.because normal-linux is very stable.
> > >
> > > MediaGXm has a TSC register.but linux-kernel disable this feature.
> > >
> > > /usr/src/linux-2.2.13/arch/i386/kerne/setup.c
> > > 676: else { /* MediaGX */
> > > 677: Cx86_cb[2] = (dir0_lsn & 1) ? '3' : '4';
> > > 678: p = Cx86_cb+2;
> > > 679: c->x86_model = (dir1 & 0x20) ? 1 : 2;
> > > 680: c->x86_capability&=~X86_FEATURE_TSC;
> > > 681: }
> > > the point is line 680,i don't know why he disables TSC.
> > >
> > > in the true,this processor has a TSC so i comment-out line 680
> > > and re-compile the kernel with gcc-2.95.2.
> > > then it become unstable.(i think MTBF is 24hour)
> > >
> > > i want your advice. what is my bad point ?
> > > thank you.
> > > yutarou ebihara [EMAIL PROTECTED]
> > > http://www.si-linux.org (SiliconLinux project)
> > >
> > > --- [rtl] ---
> > > To unsubscribe:
> > > echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
> > > echo "unsubscribe rtl <Your_email>" | mail
[EMAIL PROTECTED]
> > > ----
> > > For more information on Real-Time Linux see:
> > > http://www.rtlinux.org/~rtlinux/
> > --- [rtl] ---
> > To unsubscribe:
> > echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
> > echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
> > For more information on Real-Time Linux see:
> > http://www.rtlinux.org/~rtlinux/
--
To unsubscribe from this list, send a message to [EMAIL PROTECTED]
with the command "unsubscribe linux-embedded" in the message body.
For more information, see <http://waste.org/mail/linux-embedded>.
