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PostPosted: Mon Nov 16, 2015 3:04 pm 
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:? Hello fellow Motherboard Geeks -Collectors .

I have a sort of old Motherboard I am using in a PC I am building . An IBM Mobo -- it is supposedly froma IBM NETVISTA 8305 unit.

It has regular -sort of aTX form Factor. Blue in Color -The Printed Circuit Board .


What Iam looking for is the USB socket Pinouts -for Front Panel USB Hookup.

Anyone ever run across one of these???????

Regards -sirrushX :-|

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PostPosted: Mon Nov 16, 2015 3:13 pm 
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HMMMMMM -froma PC users group site -I got a lead that this iBM MOBO - is manufactured by GigAbyte - possibly a Model GA-8IGMIU rev1.2



sound familiar with anyone?????


regards stu sirrushx :oops:

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PostPosted: Mon Nov 16, 2015 4:35 pm 
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Not a system that meets current Win 10 basics, but still useful for other needs.
As to the USB headers.. could be a single 5-pin group, or a 10-pin dual group Pinout should be standard either way.
With a two-port USB header, you do not need two chassis ground leads. Only one is required, so the reason for a missing pin other than to key the plug and header.
Typical pinout designs: If in doubt, use a multi meter and check to ground for voltage. May be USB 2.0 status.
Shld-gnd....0..o.. no pin
Sig-gnd.....0..0.. sig-gnd
D1+.........0..0.. D2+
D1-..........0..0.. D2-
Vcc..........0..0.. Vcc

Shld-gnd....0..0.. Vcc
Sig-gnd.....0..0..D2-
D1+..........0..0..D2+
D1-..........0..0.. sig-gnd
Vcc..........0..o.. no pin

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PostPosted: Tue Nov 17, 2015 1:14 pm 
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Any idea of what Colors are ona USB Cable as regards to the Signals/ Polarities???????


Just wondering.



regards -siirushx stu

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PostPosted: Tue Nov 17, 2015 4:09 pm 
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For color codes on computer wiring.. black is ground or common, red is +5 volts, yellow is +12 volts, plus other colors.
For USB wiring, typical a black for signal ground, also for shield or chassis ground, red for +5 volts, green and white for data.
But not all USB connectors may follow the proper color scheme. If in doubt, use an ohmmeter to check the cable.
http://www.allpinouts.org/index.php/USB ... Serial_Bus

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PostPosted: Fri Nov 20, 2015 12:19 pm 
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F_PANEL2
1 HD-
2 HD+
3 PD+
4 PD-
5 +5
6 GND
7 GND
8 +5

FP_USB
1 +5
3 DATA4-
5 DATA4+
7 GND
2 +5
4 DATA5-
6 DATA5+
8 GND

general USB colors:
red +5
black GND
white DATA+
green DATA-

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PostPosted: Sat Nov 21, 2015 3:50 am 
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this one should be on the board as well somewhere, it may not have any pins:

F_PANEL1 (2x7 header)
1 HD+ 2 HD-
3 PD-(y) 4 SPK-
5 PD-(g)
7 PD+
9 PW- 10 SPK+
11 PW+ 12 RST+
13 no pin 14 RST-

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PostPosted: Mon Nov 23, 2015 10:23 am 
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ARRGH -stupid IBM Motherboard !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


Ihave a problem with this MO-Bo besides the obscure pinouts .


It seems what ever Floppydisc drive I plug into the Cable(32 pin floppy) it will NOT be recognized and just stays Illuminated (the GreenLED).

I did have hard tyme inserting a Ide Cable into the Mo-Bo -could it be IBM -in their Exclusivity -used a non-standard socket pinout on the Mo-BO???
or could tis be a Jumper issue????

Of all the Pc-s I buily/restored in the past 13 years --this one Has to be the worst . Sorry. :(

regards stusirrushx

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PostPosted: Mon Nov 23, 2015 4:02 pm 
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The data cable for a 1.44 MB 3.5" floppy has several leads twisted to designate the "A" drive status. For the "B" drive designation, no twisted leads.
Should be a common type floppy drive, but not all keep the polarity of the data ribbon the same. Normally, pin #1 should be closest to the power plug. Some brands are opposite! Check the mobo header for a tiny pointer for the #1 pin. A lot of data cables have one pin hole plugged, so they mate only one way.
With the LED illuminated on the floppy drive constantly, the data cable is reversed, either at the mobo header or the drive header.

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PostPosted: Tue Nov 24, 2015 5:57 am 
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sirrushx wrote:
It seems what ever Floppydisc drive I plug into the Cable(32 pin floppy) it will NOT be recognized and just stays Illuminated (the GreenLED)


Normally, it is due to bad polarity in the data cable, in floppy drives the pin #1 used to be the oposite to HDD drive, I mean the fartest from the power cable

I´ll chcek about the propietary pinout to see if ibm had such design, I know Dell used it

take a look at:

http://pinouts.ru/Storage/InternalDisk_pinout.shtml

seems to be that the IBM is the standard

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