FIC 486-PVT missing cap, BIOS \ VOGONS

FIC 486-PVT missing cap, BIOS

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First post, by rxive

Posted on 2024-05-20, 10:54

rxive Offline

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Joined: 2020-09-02, 08:05

Hi guys,

Can somebody look at their FIC 486-PVT board and give me the value for the capacitor C18 circled in red that my board seems to be missing. I'd also like to know, what kind of EEPROM i should use for the bios thats also missing. Last time i used a 27SF512 on a 286 board and it works great. So would a SST27SF010 (128k x8, flash) work here?

Reply 1 of 2, by majestyk

Posted on 2024-05-20, 13:59

majestyk Offline

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Joined: 2020-12-04, 09:13

FIC generally use 220µF or 470µF in this position, but according to the datasheet of the LM2576T more is better. Best compromise is 1000µF16V or if your CPU is a less powerhungry type, 470µF 25V.

EEPROM is 128K x 8 as printed on the mainboard. Any 128 KB Winbond or SST is perfect (like the common W29EE011-15).

Reply 2 of 2, by rxive

Posted on 2024-05-24, 17:51

rxive Offline

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Rank: Newbie
Posts: 3
Joined: 2020-09-02, 08:05

majestyk wrote on 2024-05-20, 13:59:

FIC generally use 220µF or 470µF in this position, but according to the datasheet of the LM2576T more is better. Best compromise is 1000µF16V or if your CPU is a less powerhungry type, 470µF 25V.

EEPROM is 128K x 8 as printed on the mainboard. Any 128 KB Winbond or SST is perfect (like the common W29EE011-15).

Thanks man, i'll try a 1000µF16V as i have it in stock.

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