FIC 486-PVT Jumper Settings for 5 Volt CPUs \ VOGONS

FIC 486-PVT Jumper Settings for 5 Volt CPUs

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First post, by alexsydneynsw

Posted on 2017-01-27, 23:18

alexsydneynsw Offline

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Hello,

I bought myself a 486-pvt motherboard and a i486sx cpu. I need help with setting up jumpers for this 5 Volt CPU on this motherboard. The manual I found on FIC ftp says I need to set up CN6 jumpers, but there is no jumper header on my board, just bare contacts labeled as CN6.

Does anyone know if I can just solder jumper header to the contact pad and set jumpers as in the manual? I haven't tried to turn it on yet.

Reply 1 of 4, by elod

Posted on 2017-01-28, 07:42

elod Offline

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Thanks for the nice photo of the VRM section.
Now back to your problem.
Just go with the settings specified for JCV. You have the regulator onboard (lucky you, I don't 😀 ) therefore it did not make sense to solder on the CN6 connectors. Also, the SX is a 5V CPU so you can't blow it up with wrong settings. You can confirm the settings with a multimeter when the system is on.

Reply 2 of 4, by alexsydneynsw

Posted on 2017-01-28, 10:57

alexsydneynsw Offline

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elod wrote:
Thanks for the nice photo of the VRM section.
Now back to your problem.
Just go with the settings specified for JCV. You have the regulator onboard (lucky you, I don't 😀 ) therefore it did not make sense to solder on the CN6 connectors. Also, the SX is a 5V CPU so you can't blow it up with wrong settings. You can confirm the settings with a multimeter when the system is on.

Thank you, this is very helpful! I didn't know this has an onboard regulator, good to know. Now it looks like this is a solid 486 board for 1991-1995 fun!

Reply 3 of 4, by elod

Posted on 2017-01-28, 11:26

elod Offline

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alexsydneynsw wrote:

Thank you, this is very helpful! I didn't know this has an onboard regulator, good to know. Now it looks like this is a solid 486 board for 1991-1995 fun!

Yes. It might or might not run a 5x86, probably depends on the BIOS version.
VLB stuff is also pretty hard to find, but they do pop up ocasionally. I payed a bit of a premium a couple of months ago for a PCI 486 board 😀

Reply 4 of 4, by evasive

Posted on 2021-05-26, 18:06

evasive Offline

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sorry for the necro, we have an UH19 page for this board:
http://www.win3x.org/uh19/motherboard/show/2394

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