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

It turns out that it might not actually apply:
http://www.usbman.com/Guides/USB_version1.0_version1.1.htm

I've been asking becaue on Wikipedia, I read that 1.0 was 1/10 the speed of
1.1 -- but it now seems that they're both the same speed. And it also seems
that from the host side, 1.0 and 1.1 are effectively the same.

I can also tell you that I've now had a chance to try a USB thumb drive in
the X20, and it does seem to transfer at about 1MB/s (what I though of as
the 1.1 speed).

So, truth is, I'm not quite sure what I have, but it does seem to be capable
of the faster (1.0 or 1.1) speed.

-Scott

> As I recall, R30 was the cheaper equivalent of the T30. As such it would
> probably have 1.1
> ----- Original Message -----
> From: "Computer Services" <canyonlands@gmail.com>
> Cc: <thinkpad@stderr.org>
> Sent: Saturday, November 03, 2007 4:23 PM
> Subject: Re: [Thinkpad] Anybody know? Is R30 USB 1 or 1.1?
>
>
> > 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@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@turnstyle.com>
> > > > To: "Jonathan Kelly" <jcrkelly@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@turnstyle.com>
> > > > >> To: "Jonathan Kelly" <jcrkelly@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@turnstyle.com>
> > > > >>>> To: thinkpad@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@stderr.org
> > > > >>>>> http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
> > > > >>>>>
> > > > >>>>>
> > > > >>>>>
> > > > >>>
> > > > >>
> > > > >
> > > > >
> > > >
> > > >
> > >
> > > _______________________________________________
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> > >
> >
> >
> >
> > --
> > ________
> >
> > I believe everything happens for a reason.
> > Usually, the reason is that sombody screwed up.
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Received on Sat Nov 3 18:16:40 2007