Anyone? 🙏🏻

It's Socket 5 and doesn't have the voltage section for the MMX, so that's not going to work. Looks like the fastest you MIGHT be able to put in there would be a Pentium 200 (P54CS).

I'm thinking JP8 (CPU speed selection) is actually just a proxy for FSB. You've got 50, 60 and 66Mhz for your FSB, so if we try and decompose what the table tells us, I've added the FSB speeds to the jumper settings here:
75Mhz - 50Mhz FSB, 1.5x multiplier - JP8 1 & 4 closed
90Mhz - 60Mhz FSB, 1.5x multiplier - JP8: 2 & 5 closed
100Mhz - 66Mhz FSB, 1.5x multiplier - JP8 3 & 6 closed

Because when we get to the next group:
120Mhz - 60Mhz FSB, 2.0x multiplier - JP8: 2 & 5 closed
133Mhz - 66Mhz FSB, 2.0x multiplier - JP8: 3 & 6 closed
150Mhz - 60Mhz FSB, 2.5x multipler - JP8: 2 & 5 closed

Soooo, for a Pentium 200 (P54CS, no MMX), you would set JP8 to 3 & 6 closed to get your 66Mhz FSB, then JP14 with 1 & 2 closed and JP18 with 2 & 3 closed, which gives you the 3x multiplier. You'd set JP13 to 1 & 2 closed for 3.3V.

That SHOULD work, but no guarantees.

thats amazing ! thank you so much for taking time to look into this ! I will give it a crack once I get a P200 cpu, found one on ebay. Thanks again !

Omarkoman wrote on 2025-02-27, 03:51:

thats amazing ! thank you so much for taking time to look into this ! I will give it a crack once I get a P200 cpu, found one on ebay. Thanks again !

You are quite welcome!

Seems its tricky to find a p200 non mmx cpu.

Would both of these work?

https://www.ebay.com.au/itm/364358290261?mkci … emis&media=COPY

https://www.ebay.com.au/itm/124926109192?mkci … emis&media=COPY

Omarkoman wrote on 2025-02-27, 19:28:

Seems its tricky to find a p200 non mmx cpu. […]
Show full quote

Seems its tricky to find a p200 non mmx cpu.

Would both of these work?

https://www.ebay.com.au/itm/364358290261?mkci … emis&media=COPY

https://www.ebay.com.au/itm/124926109192?mkci … emis&media=COPY

Yes, according to this that's the right part #:
https://www.cpu-world.com/CPUs/Pentium/Intel- … FV80502200.html

FV80502200 is P54CS.

thank you

can I ask one more favour ?

I got this motherboard :

https://theretroweb.com/motherboards/s/dataexpert-exp4045

and also bought AMD DX4-100Mhz cpu

any suggestions on how to set the jumperss correctly to work with this motherboard please?

Omarkoman wrote on 2025-02-28, 04:35:

can I ask one more favour ? […]
Show full quote

can I ask one more favour ?

I got this motherboard :

https://theretroweb.com/motherboards/s/dataexpert-exp4045

and also bought AMD DX4-100Mhz cpu

any suggestions on how to set the jumperss correctly to work with this motherboard please?

Looks pretty straightforward from the jumper page:
JP6: 1 & 2
JP16: 1 & 2
JP17: closed
JP19: 1 & 2
JP20: open
JP21: open
JP22: closed
JP23: open
JP24: open
JP25: 1 &2, 3 & 4
JP26: closed
JP27: open
JP28: 1 & 2
JP29: closed
JP30: closed
JP31: open
JP32: open
JP34: open
JP36: open

JP7: closed
JP8: closed
JP9: closed
JP16: open (3x multiplier, 33Mhz x 3)

JP18: open
JP33: open

JP16 is a large row of jumpers, so I think you just want 1 & 2 jumpered on it, the rest open.

thank you !

one more question for this motherboard, looking at the photos on the retroweb, is there a part missing here on my motherboard ? Is there a voltage regulator supposed to be there ?

voltage regulator like this one ?

https://www.ebay.com.au/itm/270933560212

Omarkoman wrote on 2025-02-28, 04:56:

thank you ! […]
Show full quote

thank you !

one more question for this motherboard, looking at the photos on the retroweb, is there a part missing here on my motherboard ? Is there a voltage regulator supposed to be there ?

voltage regulator like this one ?

https://www.ebay.com.au/itm/270933560212

Looks like a regulator goes there, but it doesn't look like it was removed (unless it was done really cleanly) so your version may not need it.
https://www.analog.com/en/products/lt1085.html

oh interesting, so it might work without it ? thats what I also thought, it looks quite clean but if you zoom in on the 2nd photo, there are three little legs sticking out so not sure if it was cut off there?

are there motherboards without it ? just seems like something obvious missing and also shows in photos on rw.

Omarkoman wrote on 2025-02-28, 05:09:

oh interesting, so it might work without it ? thats what I also thought, it looks quite clean but if you zoom in on the 2nd photo, there are three little legs sticking out so not sure if it was cut off there?

are there motherboards without it ? just seems like something obvious missing and also shows in photos on rw.

Yeah, saw those, zoomed in further, it may have been snapped off. If that's the case, you'll have to replace it, which, being 3 solder points, shouldn't be hard and you have the part #.

Edit: I also see some corrosion damage from where the battery was, so you may have some other issues too.

thanks, isnt it the part I link in the ebay link ?

https://www.ebay.com.au/itm/270933560212

yeah I saw the corosion but its not bad from what I can see and dont think any traces were significantly damaged.