[Thinkpad] Anybody know? Is R30 USB 1 or 1.1?

Computer Services canyonlands at gmail.com
Sat Nov 3 16:23:21 CDT 2007


Use the type number to figger out the build date.  If it is built after
April 18, 2001, it is 2.0 according to old notes I have from IBM. If it is
built before that, it is usually, but not always 1.1

On Nov 3, 2007 8:03 AM, Scott Matthews <scott at turnstyle.com> wrote:

> Thanks!
>
> I had been thrown off by the Wikipedia entry that stated USB 1.0 was 1.5
> Mbit/s vs. USB 1.1 at 12 Mbit -- and that's why I was trying to figure out
> whether the X20/R30 supported 1.0 or 1.1 -- lesson learned!  ;)
>
>
>
>
> > Yes.  From the linked article:
> >
> > *Did the specification for the host controller change from version 1.0
> > to 1.1? *
> >
> > NO.  The host controller portion of the USB specification is unchanged
> > in the 1.1 revision.  As part of a complete USB specification,
> > specification 1.1 included the UNCHANGED 1.0 USB host controller
> > specification.  There is NO difference in the host controller
> > specification in version 1.1.
> >
> > Which backs up my statement that the host in 1.0 & 1.1 are both capable
> > of 12Mbit/s speeds, and it is the device that is the determining factor.
> > I recall back in the day that some webcams were 1.0 and others 1.1, and
> > only the 1.1 cams were able to do 320x240 at 30fps.
> >
> > -------- Original Message --------
> > Subject: Re:[Thinkpad] Anybody know? Is R30 USB 1 or 1.1?
> > From: "Scott Matthews" <scott at turnstyle.com>
> > To: "Jonathan Kelly" <jcrkelly at gmail.com>
> > Date: 11/3/2007 9:48 AM
> > > I just found this:
> > > http://www.usbman.com/Guides/USB_version1.0_version1.1.htm
> > >
> > > Would you similarly interpret this to mean that there is no difference
> > > between USB 1 and 1.1 on the ThinkPad side?
> > >
> > > -Scott
> > >
> > >
> > >
> > >
> > >> I'm pretty certain from personal past experience that any 1.0interface
> > >> is capable of 12Mbit/s.  The question lies with the device being
> > >> connected, as to whether it is a low of full speed device.
> > >>
> > >> -------- Original Message --------
> > >> Subject: Re:[Thinkpad] Anybody know? Is R30 USB 1 or 1.1?
> > >> From: "Scott Matthews" <scott at turnstyle.com>
> > >> To: "Jonathan Kelly" <jcrkelly at gmail.com>
> > >> Date: 11/3/2007 9:34 AM
> > >>
> > >>> hmm, also from Wikipedia (http://en.wikipedia.org/wiki/Mbit/s):
> > >>>
> > >>> Interface and device speeds:
> > >>>     USB, Low speed (1.0) -- 1.5 Mbit/s -- 0.18 MB/s
> > >>>     USB, Full speed (1.1) -- 12 Mbit/s -- 1.5 MB/s
> > >>>     USB, Hi speed (2.0) -- 480 Mbit/s -- 60 MB/s
> > >>>
> > >>> And the current version of Wikipedia's USB page
> > >>> (http://en.wikipedia.org/wiki/Usb):
> > >>>
> > >>> USB supports three data rates:
> > >>>     A Low Speed (1.1, 2.0) rate of 1.5 Mbit/s (192 KB/s)
> > >>>     A Full Speed (1.1, 2.0) rate of 12 Mbit/s (1.5 MB/s)
> > >>>     A Hi-Speed (2.0) rate of 480 Mbit/s (60 MB/s).
> > >>> (no mention of USB1)
> > >>>
> > >>> Does a USB 1 port become a USB 1.1 though a driver update, or does a
> USB
> > >>>
> > > 1
> > >
> > >>> port have different electronics?
> > >>>
> > >>> I'm just trying to figure out whether the USB on an X20 and R30 will
> do
> > >>>
> > > 12
> > >
> > >>> Mbit/s, or just 1.5 Mbit/s -- and I can't seem to find anything that
> > >>> documents it!
> > >>>
> > >>> Confused!  -Scott
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>> Weren't you just asking this about an X20 the other day?
> > >>>>
> > >>>> Also -- do you mean 1.1 vs. 2.0??  There aren't any speed diffs
> between
> > >>>> 1.0 & 1.1.  Just some fixes.
> > >>>>  From http://en.wikipedia.org/wiki/Usb#Version_history :
> > >>>> USB 1.0: 1996, 1.5 & 12 Mbit/s
> > >>>> USB 1.1: 1998, 1.5 & 12 Mbit/s
> > >>>> USB 2.0: 2000, 1.5, 12 & 480 Mbit/s
> > >>>>
> > >>>> -------- Original Message --------
> > >>>> Subject: [Thinkpad] Anybody know? Is R30 USB 1 or 1.1?
> > >>>> From: "Scott Matthews" <scott at turnstyle.com>
> > >>>> To: thinkpad at stderr.org
> > >>>> Date: 11/3/2007 8:25 AM
> > >>>>
> > >>>>
> > >>>>> I can only seem to find things saying that R30 has USB, but not
> > >>>>>
> > > whether
> > >
> > >>> it's
> > >>>
> > >>>
> > >>>>> USB 1 or 1.1
> > >>>>>
> > >>>>> Anybody happen to know?
> > >>>>>
> > >>>>> thanks,  -Scott
> > >>>>>
> > >>>>> _______________________________________________
> > >>>>> Thinkpad mailing list
> > >>>>> Thinkpad at stderr.org
> > >>>>> http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>
> > >>
> > >
> > >
> >
> >
>
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