[Techtalk] USB hardware question
mikecarson at usa.net
Thu Jan 10 14:30:13 EST 2002
One additional question that's been bugging me is how do I tell what
device devices plugged into the USB ports are using? I have an MP3
player that sometimes is /dev/sda and sometimes /dev/sdb, a serial port
that is /dev/ttyUSB0 that took the better part of a day to find, etc.
It seems logical that this info should be found in /proc or /var/log/
but heck if I can find it. Any ideas?
Amanda Babcock wrote:
>I'm trying to set up my computer for USB and I'm confused about the
>It doesn't have any USB ports that I'm aware of, but the manual for the
>motherboard mentions USB in the part about support for a PS/2 mouse.
>Back in 98 or so I bought a no-name USB PCI card, a Kouwell KW-580, and
>installed it but was never able to make it work (not even under Windows).
>The USB card is currently not installed, but the machine must be detecting
>the host controller on the motherboard because it shows the following
>during boot-up (this is a FreeBSD system):
>Dec 11 22:34:05 mercury /kernel: uhci0: <VIA 83C572 USB controller>
port 0x6100-0x611f irq 11 at device 7.2 on pci0
>Dec 11 22:34:05 mercury /kernel: usb0: <VIA 83C572 USB controller> on
>Dec 11 22:34:05 mercury /kernel: usb0: USB revision 1.0
>(Incidentally, the motherboard manual does not show a "VIA 83C572"
>in the diagram...)
>So, my question is: do I *need* a USB card, or can I plug stuff into the
>controller? What's a USB controller anyway? Am having trouble finding a
>basic "What is USB" page out there. Plenty of info on required drivers
>and kernel configs for both Linux and FreeBSD, but nothing on "what the
>heck is USB anyway".
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