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Marcin
Joined: 02 Jan 2005
Posts: 8519
Location: Poland
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 Posted: Thu Sep 27, 2007 12:05 pm Post subject: Problem with fitting PSU |
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I got 80186 class motherboard. It have integrated VGA card so it could be great to have test moard for x186 CPUs.
There are nearby two PSU connectors. Someone had experience with board like this ? I don't know if I can risk and plug standard AT PSU.
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Last edited by Marcin on Thu Sep 27, 2007 4:02 pm; edited 1 time in total |
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jrmunro
Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada
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| Posted: Thu Sep 27, 2007 3:16 pm Post subject: |
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Marcin,
The pins on the board are square not flat like on AT PS connectors. The AT PS has two connectors each with 6 slots on each. Each of the connectors on your board have 10. These look more like connectos on an old IBM AT or PS2 ( I`m not sure which)
Doing a search of Cabletron or the Part # got ne nowhere. |
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Marcin
Joined: 02 Jan 2005
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| Posted: Thu Sep 27, 2007 3:46 pm Post subject: |
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Thanks John for help.
I checked where is ground.
12V is going to power capacitors ? if yes I got 12V line.
so other pairs of pins are propably 5V ?
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Marcin
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Marcin
Joined: 02 Jan 2005
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| Posted: Thu Sep 27, 2007 4:45 pm Post subject: |
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thanks i440BX ... I could burn it by 12V on 5V line. In fact there where I marked 12V there is 5V.
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i440bx
Joined: 30 May 2004
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faber
Joined: 18 Dec 2006
Posts: 315
Location: Poznan, Poland
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| Posted: Fri Sep 28, 2007 1:03 am Post subject: |
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I just wondering ... this 12V really need ?
I think all chips need 5V or less.
Maybe you should try connect with 5V 
12V for disks or fans... |
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Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
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| Posted: Fri Sep 28, 2007 1:16 am Post subject: |
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| +12V is needed at least for MAX239, RS232 serial port level converter. |
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faber
Joined: 18 Dec 2006
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Location: Poznan, Poland
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| Posted: Fri Sep 28, 2007 2:31 am Post subject: |
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oh I overlook.
what about -12V and -5V ? |
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Marcin
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Marcin
Joined: 02 Jan 2005
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| Posted: Fri Sep 28, 2007 11:53 am Post subject: |
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Finally I turned on system. Only green status leds are on. When I turn on motherboard without CPU additional red is displayed. It seems to be OK but I don't know if that is COM or DB9 (VGA) port. I never saw blue COM port but it could explain why it not display anything on CGA monitor.
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Elar
Joined: 16 Jul 2003
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Location: Tallinn, Estonia
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| Posted: Fri Sep 28, 2007 12:22 pm Post subject: |
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| Marcin, it's not PC motherboard. Made by Cabletron Systems, maker of network gear (there's DP8390 ethernet controller on board). Blue connector is RS232 serial port. Connect it to your PC serial port and you probably see some configuration screen. |
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Marcin
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CPUShack
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Marcin
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