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Achitec 6fx-b

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First post, by cristiansp

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Does anyone have the electrical diagram for the Achitec 6fx-b motherboard?
It is a motherboard for a Pentium Pro processor.
I need the electrical diagram because the motherboard does not detect the HD. It freezes when identifying it.
Thank you very much.

Reply 1 of 6, by rasz_pl

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Intel 82371FB (PIIX) datasheet has pinout page 112 https://theretroweb.com/chipsets/274#docs
ide pins definitions on page 11 12

https://github.com/raszpl/FIC-486-GAC-2-Cache-Module for AT&T Globalyst
https://github.com/raszpl/386RC-16 memory board
https://github.com/raszpl/440BX Reference Design adapted to Kicad
https://github.com/raszpl/Zenith_ZBIOS MFM-300 Monitor

Reply 2 of 6, by weedeewee

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FYI, freezing when identifying the drive could indicate a bios issue if the drive you are using is a large disk. Could freeze on disks over 32G, 64G or 128G.

Right to repair is fundamental. You own it, you're allowed to fix it.
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https://www.vogonswiki.com/index.php/Serial_port

Reply 3 of 6, by cristiansp

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weedeewee wrote on 2024-10-18, 09:35:

FYI, freezing when identifying the drive could indicate a bios issue if the drive you are using is a large disk. Could freeze on disks over 32G, 64G or 128G.

I tried with an 80GB HD and a 16GB CF Card to IDE adapter. Both freeze. Thank you very much for this information. I will try to find a compatible HD.

Reply 5 of 6, by Paadam

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Boards from Pentium Pro era can freeze with drives over 8,4 GB too.

If it has Award BIOS just use Bios Patcher 4.23, it will patch BIOS to allow drives up to 128 GB

Many 3Dfx and Pentium III-S stuff.
My amibay FS thread: www.amibay.com/showthread.php?88030-Man ... -370-dual)

Reply 6 of 6, by cristiansp

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Paadam wrote on 2024-10-19, 18:30:

Boards from Pentium Pro era can freeze with drives over 8,4 GB too.

If it has Award BIOS just use Bios Patcher 4.23, it will patch BIOS to allow drives up to 128 GB

I didn't know about this program. Thank you very much for the information. =D