Something.

Okay I'm kidding.
You can definitely remove CPUs from LIF sockets, just that it's going to be much harder

Simple answer : there's none. And I'm pretty sure the empty socket is for a dallas battery chip or something like that. Or the battery is just supposed to be right under the keyboard connector. Or both ? If it's actually storing CMOS infos, I'm pretty sure that if you stop it and wait for an hour or two, the settings will be gone.

What does the FCC ID tell you?
FWIW the board uses AV9107-03 clock generator which can produce bus speeds ranging from 2MHz to 100MHz.

And I'm pretty sure the empty socket is for a dallas battery chip or something like that

My suspicion as well, however I think it's the wrong amount of pins. I need to check that again though as I can't quite remember. I have a DS12287+ in one of my other boards I can try out.

What does the FCC ID tell you?

Not much sadly. It just leads me back to defunct links for Mustek.

FWIW the board uses AV9107-03 clock generator which can produce bus speeds ranging from 2MHz to 100MHz.

Thanks for this bit of info. For my own personal education, could you tell me how you know that table is applicable to this motherboard?

I noticed something printed on the motherboard between the 8-bit slot and the 16-bit slot (SXCP...). Mustek used to in the past use rebranded motherboards from other manufacturers.
You might be able to identify your motherboard here: http://arvutimuuseum.ee/th99/#1

It's possible that the original owner desoldered the barrel battery (which would have been next to the keyboard connector).
Normally, motherboards like these, had an external battery connector as well

Based on your motherboard, I would say that this one only supports 5V CPU's.

PS: Where are you based?

I noticed something printed on the motherboard between the 8-bit slot and the 16-bit slot (SXCP...)

I should have included that in my original post. It says SXCPCB87002, which is unfortunately another dead end.

The FCC ID is GP-M7486VL, which brings you here: https://fccid.io/GPT (which doesn't say much beyond that it's for a Mustek "mini-tower computer".)

You might be able to identify your motherboard here:

That's an amazing resource, thank you. I'll trawl through that to see if I spot anything.

PS: Where are you based?

Scotland!

jesolo wrote:

It's possible that the original owner desoldered the barrel battery (which would have been next to the keyboard connector).

Possible, although the pads on the motherboard there are super clean. What would be the best way to restore the battery?

pcrob wrote:

What would be the best way to restore the battery?

There should be an external battery connector — I think it's the four pins above the Jetkey chip (what's a "keyboard BIOS", I wonder? And how can it be "the fastest"?). You can get an external battery holder that connects there and accepts regular AA accumulators (since this board probably used a recharging CMOS battery, don't try using regular AA batteries — they will overheat quickly).

Or buy a super capacitor and put it in the battery spot, it'll work great as well 😉