devu-uhci kills network

I installed the usb ddk and ran devu-uhci. The good news is that running
‘usb’ identified all the devices on the bus OK. The bad news is that my
network connection died.

I have a legacy NE2000 ISA card on irq 5/port 340h which is detected
automatically by the install procedure.

Any ideas?

Jim Douglas

Jim Douglas <jim@dramatec.co.uk> wrote:

I installed the usb ddk and ran devu-uhci. The good news is that running
‘usb’ identified all the devices on the bus OK. The bad news is that my
network connection died.

I have a legacy NE2000 ISA card on irq 5/port 340h which is detected
automatically by the install procedure.

Any ideas?

Can you post the output from “pci -v” after you start devu-uhci?

“Kevin Chiles” <kchiles@qnx.com> wrote in message
news:96r3ss$iae$1@nntp.qnx.com

Jim Douglas <> jim@dramatec.co.uk> > wrote:
I installed the usb ddk and ran devu-uhci. The good news is that running
‘usb’ identified all the devices on the bus OK. The bad news is that my
network connection died.

I have a legacy NE2000 ISA card on irq 5/port 340h which is detected
automatically by the install procedure.

Any ideas?

Can you post the output from “pci -v” after you start devu-uhci?

File ‘pci-v.txt’ is appended…



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end

I have a legacy NE2000 ISA card on irq 5/port 340h which is detected
automatically by the install procedure.

Any ideas?

Can you post the output from “pci -v” after you start devu-uhci?

File ‘pci-v.txt’ is appended…

I think your answering your own question there. Your pci -v shows that
the USB controller is on IRQ 5 also. You cannot share interrupts
between
ISA and PCI. You should be able to tell your BIOS that IRQ 5 is
reserved
for legacy devices.

Rennie

“Rennie Allen” <RAllen@csical.com> wrote in message
news:D4907B331846D31198090050046F80C902915F@exchangecal.hq.csical.com

I have a legacy NE2000 ISA card on irq 5/port 340h which is detected
automatically by the install procedure.

Any ideas?

Can you post the output from “pci -v” after you start devu-uhci?

File ‘pci-v.txt’ is appended…

I think your answering your own question there. Your pci -v shows that
the USB controller is on IRQ 5 also. You cannot share interrupts
between
ISA and PCI. You should be able to tell your BIOS that IRQ 5 is
reserved
for legacy devices.

The PC uses the Award BIOS. I changed irq 5 so that it was ‘used by ISA’.
This made no difference : pci -v still showed the USB controller being
assigned irq5. Then I noticed a setting for ‘use USB interrupt’ on the same
page. It was off, so I turned it on. This time the USB controller was
assigned irq 3 and the network card was OK.

The logic of this defeats me. If you turn off the USB interrupt it will use
irq 5. On the other hand, if you turn it on…

Jim Douglas

The PC uses the Award BIOS. I changed irq 5 so that it was ‘used by
ISA’.
This made no difference : pci -v still showed the USB controller being
assigned irq5. Then I noticed a setting for ‘use USB interrupt’ on the
same
page. It was off, so I turned it on. This time the USB controller was
assigned irq 3 and the network card was OK.

The logic of this defeats me. If you turn off the USB interrupt it will
use
irq 5. On the other hand, if you turn it on…

Perhaps what they mean to say is “Turn off the fixed USB interrupt,
and
have the USB IRQ assigned by the PCI enumerator” ?

Doesn’t make much sense to me either. Glad your problem is solved.

Rennie