Booting PS/2 Model 25SX from XT-CF card

[Rubix]

Hi all, I have installed this XT-CF card in my PS/2 Model 25SX but it won't bring up the option ROM of the card.

I tested and used the card in an AST 486 and it works perfectly in that computer. I installed MS-DOS 6.22 on a 32 MB CF card.

The PS/2 however shows error 161 and 163 (invalid CMOS settings), and when I press F1, it tries to boot from floppy disk and then goes straight to BASIC. No option ROM of the add-on card is shown.

The problem is that the FDD is bad and I am trying to avoid having to repair it. I did replace the CMOS battery but never set the BIOS settings because I can't boot from a diagnostics disk.

Is there anything I'm not aware of with these computers? Should I use different jumper settings on the motherboard or card?

• This is the card I'm using: https://shop.bluelavasystems.com/pr...t-isa-compactflash-xt-ide-with-slot-8-support
• This describes the motherboard of my computer (K00 is my specific model code): https://www.ardent-tool.com/8525/Planar_SX.html

 

[T-R-A]

The PS/2 however shows error 161 and 163 (invalid CMOS settings), and when I press F1, it tries to boot from floppy disk and then goes straight to BASIC. No option ROM of the add-on card is shown.

Sure the CMOS battery isn't dead? 161/163 errors are almost a sure sign of such...

 

[Rubix]

I replaced the battery twice with a brand new one. I'm afraid these errors will keep happening though, as long as I cannot boot into the diagnostics disk. I was hoping that the ROM on the XT-CF card would interrupt the boot process so that I don't need the FDD.