On Jul 5, 8:28 am, Ben Myers <ben_myers_spam_me_...@charter.net>
wrote:
> Right! Has anyone ever connected up 127 USB devices on a computer, let alone
> through a single USB port? Cable impedence would be a nightmare. This is
> another case of paper specsmanship and hype, without a reality check. And
> people pick on SCSI for being difficult! ... Ben Myers
>
It's one thing i've always wanted to try. But in reality: most
people top out at less than 10. Keyboard, mouse, printer, scanner,
card reader, external HDD, external dvd burner, modem/ethernet/802.11
whatever, pen drive. That's pretty much it for a semi-sane setup.
> On Thu, 05 Jul 2007 00:24:14 -0700, "pau...@efn.org" <pau...@efn.org> wrote:
> >On Jul 4, 4:20 am, Ron Hardin <rhhar...@mindspring.com> wrote:
> >> Can you plug in something to get more USB ports? I don't know how
> >> they're wired, whether there are fan-out devices or what that make
> >> them work with the software as if there are more ports.
>
> >> (Oh, for the days of hardware manuals! You could understand and
> >> even program any hardware device from the DEC, GE, IBM or Honeywell
> >> manuals back in the good old days when manufacturers were actually
> >> writing for programmers, by reading a couple pages. All questions
> >> were anticipated and answered, starting from an acknowledged general
> >> knowledge environment. Now everything has the word ``turbo'' in
> >> it, and nothing else.)
>
> >> The Inspiron 6400 comes with all of two USB ports, which seems to me
> >> is likely to be low, needswise.
>
> >> --
> >> Ron Hardin
> >> rhhar...@mindspring.com
>
> >> On the internet, nobody knows you're a jerk.
>
> >In theory, you can have up to 127 usb devices through cascading hubs.
> >In practice.... it would suck, to say the
On Wed, 04 Jul 2007 11:20:20 GMT, Ron Hardin <rhhardin@mindspring.com>
wrote:
>Can you plug in something to get more USB ports? I don't know how
>they're wired, whether there are fan-out devices or what that make
>them work with the software as if there are more ports.
>
>(Oh, for the days of hardware manuals! You could understand and
>even program any hardware device from the DEC, GE, IBM or Honeywell
>manuals back in the good old days when manufacturers were actually
>writing for programmers, by reading a couple pages. All questions
>were anticipated and answered, starting from an acknowledged general
>knowledge environment. Now everything has the word ``turbo'' in
>it, and nothing else.)
>
>The Inspiron 6400 comes with all of two USB ports, which seems to me
>is likely to be low, needswise.
As already mentioned, the 6400 comes with 4 built-in USB ports.
If you have an iPod, Belkin makes a combo iPod dock and USB hub. It
works great.
(I don't know what the difference is between the two models other than
color and price)
Belkin also makes a good "USB thumb drive" with 4 ports which is
compact and has an optional power supply. The size makes it useful
for some notebook applications.
D-link also makes a good USB hub which is often on sale very
inexpensively with mail-in rebates. It's currently $30 on buy.com but
I have seen it for as little as $15 after the mail-in rebate.
- Enter "USB Hub" in the search box and you will see current and some
past deals so you will know the prices you can get if you monitor that
and other sites.
Be aware that mixing USB 1.1 and USB 2 on the same hub may slow all
ports on that hub to the lesser speed.
Ben Myers wrote:
> Right! Has anyone ever connected up 127 USB devices on a computer, let alone
> through a single USB port? Cable impedence would be a nightmare. This is
> another case of paper specsmanship and hype, without a reality check. And
> people pick on SCSI for being difficult! ... Ben Myers
>
>Ben Myers wrote:
>> Right! Has anyone ever connected up 127 USB devices on a computer, let alone
>> through a single USB port? Cable impedence would be a nightmare. This is
>> another case of paper specsmanship and hype, without a reality check. And
>> people pick on SCSI for being difficult! ... Ben Myers
>>
>
>Not yet but I have about 18 so far....
>
>1. Keyboard (direct)
>2. Mouse (direct)
>3. Laser Printer (Hub 1)
>4. Scanner (Hub 1)
>5. Memory card reader (Hub 1)
>6. Bluetooth interface (Hub 1)
>7. Webcam (Hub 1)
>8. Photo Scanner (Hub 2)
>9. Photo Printer (Hub 2)
>10. Exterior Camera 1 (Hub 2)
>11. Exterior Camera 2 (Hub 2)
>12. Audio Control mixing interface (direct)
>13. Portable Hard Drive 1 (Hub 3)
>14. Portable Hard Drive 2 (Hub 3)
>15. Portable Hard Drive 3 (Hub 3)
>16. Portable Hard Drive 4 (Hub 3)
>17. UPS control (direct)
>18. 1 empty extension cable.
>
>This is in the old 8200 with 4 factory ports and an add-on USB 2 card.
>Still have two empty ports on it
You can add a PCI card (for a laptop, a Cardbus PC Card) that actually
gives you more ports.
OR ....
You can get a hub that lets you connect more devices (in theory up to
127 devices, but in practice usually 4 to 8) to each of your existing
two ports. Note that SOME devices won't work through a hub port (fairly
few, fortunately, but unfortunately the "few" includes a lot of printers
and multi-function printer / scanner / copier / fax devices).
Ron Hardin wrote:
> Can you plug in something to get more USB ports? I don't know how
> they're wired, whether there are fan-out devices or what that make
> them work with the software as if there are more ports.
>
> (Oh, for the days of hardware manuals! You could understand and
> even program any hardware device from the DEC, GE, IBM or Honeywell
> manuals back in the good old days when manufacturers were actually
> writing for programmers, by reading a couple pages. All questions
> were anticipated and answered, starting from an acknowledged general
> knowledge environment. Now everything has the word ``turbo'' in
> it, and nothing else.)
>
> The Inspiron 6400 comes with all of two USB ports, which seems to me
> is likely to be low, needswise.
>
On Thu, 05 Jul 2007 11:28:47 -0400, Ben Myers
<ben_myers_spam_me_not@charter.net> wrote:
>Right! Has anyone ever connected up 127 USB devices on a computer, let alone
>through a single USB port? Cable impedence would be a nightmare. This is
Can you imagine trying to remember what all 127 would do besides the
127 cables lying all around !!
I guess it's not for the faint of heart and not for me either .
RnR wrote:
>
> On Thu, 05 Jul 2007 11:28:47 -0400, Ben Myers
> <ben_myers_spam_me_not@charter.net> wrote:
>
> >Right! Has anyone ever connected up 127 USB devices on a computer, let alone
> >through a single USB port? Cable impedence would be a nightmare. This is
>
> Can you imagine trying to remember what all 127 would do besides the
> 127 cables lying all around !!
>
> I guess it's not for the faint of heart and not for me either .
You ought to be able to get 128 unless somebody has coded away the possibility
of a zero as a valid address. (0 to 127 inclusive = 128 addresses, 7 bits)
> You ought to be able to get 128 unless somebody has coded
> away the possibility of a zero as a valid address.
> (0 to 127 inclusive = 128 addresses, 7 bits)
Hmmm...I wonder if the "0" might be reserved by the host controller?
It will be hard to tell...although I have a lot of USB devices, I
don't have 128 of them...at least not yet! The biggest USB chain I
have is about 10 USB 1.1 devices. They are not all active at once, so
this setup works fine.
Re: USB ports? 
But in reality: most
Linear Mode
