How to connect front-panel USBs to motherboard?

7 Apr 2005 3:37 PM

David Cook

I just built another computer (Asus A7V880 mobo) and
the case has two USB-ports on the front panel.

The wiring harnesses (2, one for each of 2 ports) each
have 7 separate wires, labeled very differently than the
corresponding pins on the motherboard.

Thus, I am at a total loss as to how to 'map' each of the 7
labeled wires onto the corresponding 8 pins.

(Sorry...don't have the case open right now, so for now at least,
I won't mention the specific various names on each of the 8 mobo-pins
and the other names on each of the 7 wires.)

But, based on my description of this issue, can someone point me
to some method of determining what this mapping might be?

(The mobo manual describes the mobo-pin names clearly but just
naively assumes the their chosen names will be identical to the names
on the wires coming from the case-front-panel.)

Ideas?

Dave [Ok...I'll follow up shortly and open the case and post all the
names in a reply to this note.]

7 Apr 2005 4:28 PM

John@Smith.com

Show quote Hide quote

On Thu, 7 Apr 2005 11:37:22 -0400, "David Cook" <some***@nowhere.net>
wrote:

>I just built another computer (Asus A7V880 mobo) and
>the case has two USB-ports on the front panel.
>
>The wiring harnesses (2, one for each of 2 ports) each
>have 7 separate wires, labeled very differently than the
>corresponding pins on the motherboard.
>
>Thus, I am at a total loss as to how to 'map' each of the 7
>labeled wires onto the corresponding 8 pins.
>
>(Sorry...don't have the case open right now, so for now at least,
>I won't mention the specific various names on each of the 8 mobo-pins
>and the other names on each of the 7 wires.)
>
>But, based on my description of this issue, can someone point me
>to some method of determining what this mapping might be?
>
>(The mobo manual describes the mobo-pin names clearly but just
>naively assumes the their chosen names will be identical to the names
>on the wires coming from the case-front-panel.)
>
>Ideas?

Geez Ive had this problem too. I always skip it , dont bother its just
a hassle. Why in the heck dont they standardize it and just have one
plug SHEESH ! Its ridiculous.

I did see a site and successfully did one a while ago .

Here try this one.
http://www.directron.com/installusb.html

8 Apr 2005 2:25 AM

David Cook

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"J***@Smith.com" <xxxxs***@newscene.com> wrote in message
news:dsna51ljahr1vb0nrkrdu6topt26u9rhav@4ax.com...
> On Thu, 7 Apr 2005 11:37:22 -0400, "David Cook" <some***@nowhere.net>
> wrote:
>
>>I just built another computer (Asus A7V880 mobo) and
>>the case has two USB-ports on the front panel.
>>
>>The wiring harnesses (2, one for each of 2 ports) each
>>have 7 separate wires, labeled very differently than the
>>corresponding pins on the motherboard.
>>
>>Thus, I am at a total loss as to how to 'map' each of the 7
>>labeled wires onto the corresponding 8 pins.
>>
>>(Sorry...don't have the case open right now, so for now at least,
>>I won't mention the specific various names on each of the 8 mobo-pins
>>and the other names on each of the 7 wires.)
>>
>>But, based on my description of this issue, can someone point me
>>to some method of determining what this mapping might be?
>>
>>(The mobo manual describes the mobo-pin names clearly but just
>>naively assumes the their chosen names will be identical to the names
>>on the wires coming from the case-front-panel.)
>>
>>Ideas?
>
> Geez Ive had this problem too. I always skip it , dont bother its just
> a hassle. Why in the heck dont they standardize it and just have one
> plug SHEESH ! Its ridiculous.
>
> I did see a site and successfully did one a while ago .
>
> Here try this one.
> http://www.directron.com/installusb.html
>

That site looks like EXACTLY what I was hoping for.

(I haven't followed it yet, but the pictures alone convince me
that it should fill the bill nicely.)

Thanks again, John, for the info.

Cheers...

Dave

7 Apr 2005 6:50 PM

kony

On Thu, 7 Apr 2005 11:37:22 -0400, "David Cook"
<some***@nowhere.net> wrote:

Show quoteHide quote

>I just built another computer (Asus A7V880 mobo) and
>the case has two USB-ports on the front panel.
>
>The wiring harnesses (2, one for each of 2 ports) each
>have 7 separate wires, labeled very differently than the
>corresponding pins on the motherboard.
>
>Thus, I am at a total loss as to how to 'map' each of the 7
>labeled wires onto the corresponding 8 pins.
>
>(Sorry...don't have the case open right now, so for now at least,
>I won't mention the specific various names on each of the 8 mobo-pins
>and the other names on each of the 7 wires.)
>
>But, based on my description of this issue, can someone point me
>to some method of determining what this mapping might be?
>
>(The mobo manual describes the mobo-pin names clearly but just
>naively assumes the their chosen names will be identical to the names
>on the wires coming from the case-front-panel.)
>
>Ideas?
>
>Dave [Ok...I'll follow up shortly and open the case and post all the
>names in a reply to this note.]
>

The (standard-for-Asus?) pin header for your board should
be,

Pin    Function    USB Port # (relative)
---------------------------------------------
1    5V        1
2     5V        2
3    Data -        1
4    Data -        2
5    Data +    1
6    Data +    2
7    Gnd        1
8    Gnd        2

So you have the 4 pins per each port # in a sraight row of
5V, Data -, Data +, & GND.

On "most" cases (IF they're correctly color-coded) the
colors would be:

5V - red
Data - white
Data + green
Gnd black

if your case connector is like this already you could check
for continuity with a multimeter but you're probably done.
If it doesn't match that then you will have to rearrange the
wires as appropriate.