SCO

I wanted to install SCO Openserver 6.0.0 on this system Intel Server System SR2625UR - Overview

The problem was that the installation routine requested input from the keyboard before loading the USB keyboard driver.

I resolved the issue by:
Building a simple desktop system with an IDE controller, 2gb of memory, a standard PS2 keyboard and mouse, and a PCI Express slot.
I installed the LSI RAID controller(LSI00178) in the PCI Express slot along with four 256gb SSD disks and a standard IDE cd-rom, as primary master.

I booted from the SCO boot disk (second cut) and loaded the megasas driver from the SCO maintenance pack 4 device driver cd.
When the installation was complete, I rebooted the system and installed maintenance pack 4, and most importantly installed OSS714 which is a fix for a USB 2.0 problem with systems having more that 4gb of memory, and the network driver package (nd) on the MP4 driver cd.

Finally I installed the RAID controller, and the SSD's into the SR2525UR chassis.

The onboard ethernet chip is not supported, so I substituted an Intel PRO1000MT.
All of the cd's used are available from SCO's web site.

Did you try typing PSM=atup at the boot: before loading the software? As far as I know SCO 6 will only see USB keyboards during the initial install if you do that until you can load MP4. This is true of all installations of SCO 6.

Yes I did, along with a whole lot of other things that were supposed to work, there was a technical article about the Fujitsu machine that uses the same mb, but it did not work either. I also tried the Remote Management Module (RMM3) and it didn't work either.
Also the mb uses three banks of memory, so either 3gb or 6. If you use 6gb, then you have to install OSS714 before any of the USB devices will work anyway.
This machine is now in production, and is about 6 times faster than the Proliant 350ML that it replaces.