xylolfrei wrote on 2023-12-31, 09:28:

Hello everyone! […]
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Hello everyone!

I have recently come in to possession of a Pine Technology PT-430 motherboard. It required new capacitors and some trace repair from battery damage but she came back to life.
You can find the retroweb page here:
https://theretroweb.com/motherboards/s/pine-t … chnology-pt-430

It is a very capable motherboard released towards the end of the socket 3 era and supports DX4 processors.

However...

In order to support DX4 chips that run at ~3.3 volts, Pine Tech would sell an optional daughter board containing a voltage regulator that plugged into headers on the board and stepped down the standard 5 volts to 3.3 volts. As you can probably guess, this daughter board is unobtainium at this point.

Therefore, I come to you in the slim hope that someone out there is in possession of this daughter-board and could upload high-res photos of both sides. That way, I could reproduce the board and unlock the true potential of the PT-430. From the photos I can find online, it seems like a relatively simple board but being able to see the traces and values of components would be incredibly helpful.

Welcome to Vogons 😀

There was a member with this board & VRM combo (though not been active here for over a year) - you can't send PMs yet but you could reply to his post re. the board and see if you get a response - Re: Bought these (retro) hardware today

PC Hoarder Patrol wrote on 2023-12-31, 18:08:

xylolfrei wrote on 2023-12-31, 09:28:

Hello everyone! […]
Show full quote

Hello everyone!

I have recently come in to possession of a Pine Technology PT-430 motherboard. It required new capacitors and some trace repair from battery damage but she came back to life.
You can find the retroweb page here:
https://theretroweb.com/motherboards/s/pine-t … chnology-pt-430

It is a very capable motherboard released towards the end of the socket 3 era and supports DX4 processors.

However...

In order to support DX4 chips that run at ~3.3 volts, Pine Tech would sell an optional daughter board containing a voltage regulator that plugged into headers on the board and stepped down the standard 5 volts to 3.3 volts. As you can probably guess, this daughter board is unobtainium at this point.

Therefore, I come to you in the slim hope that someone out there is in possession of this daughter-board and could upload high-res photos of both sides. That way, I could reproduce the board and unlock the true potential of the PT-430. From the photos I can find online, it seems like a relatively simple board but being able to see the traces and values of components would be incredibly helpful.

Welcome to Vogons 😀

There was a member with this board & VRM combo (though not been active here for over a year) - you can't send PMs yet but you could reply to his post re. the board and see if you get a response - Re: Bought these (retro) hardware today

Thanks! I'll give it a go.

I might actually have one over, just opened a machine that had rather bad corrosion so the keyboard is dead on it. My skills are not enogh to fix it but the machine actually had a little bag inside with an unused daughterboard and I dont think I will use this. A bit far away however, Im in Sweden. 😀

Axman wrote on 2024-02-04, 19:23:

I might actually have one over, just opened a machine that had rather bad corrosion so the keyboard is dead on it. My skills are not enogh to fix it but the machine actually had a little bag inside with an unused daughterboard and I dont think I will use this. A bit far away however, Im in Sweden. 😀

Can you take some very good pictures (front, back, top and bottom) of this adapter and post them please ?

Horun wrote on 2024-02-05, 00:42:

Axman wrote on 2024-02-04, 19:23:

I might actually have one over, just opened a machine that had rather bad corrosion so the keyboard is dead on it. My skills are not enogh to fix it but the machine actually had a little bag inside with an unused daughterboard and I dont think I will use this. A bit far away however, Im in Sweden. 😀

Can you take some very good pictures (front, back, top and bottom) of this adapter and post them please ?

Horun wrote on 2024-02-05, 00:42:

Axman wrote on 2024-02-04, 19:23:

I might actually have one over, just opened a machine that had rather bad corrosion so the keyboard is dead on it. My skills are not enogh to fix it but the machine actually had a little bag inside with an unused daughterboard and I dont think I will use this. A bit far away however, Im in Sweden. 😀

Can you take some very good pictures (front, back, top and bottom) of this adapter and post them please ?

And the last 3, I hope they are clear enough!

Axman wrote on 2024-02-11, 17:44:

Horun wrote on 2024-02-05, 00:42:

Axman wrote on 2024-02-04, 19:23:

I might actually have one over, just opened a machine that had rather bad corrosion so the keyboard is dead on it. My skills are not enogh to fix it but the machine actually had a little bag inside with an unused daughterboard and I dont think I will use this. A bit far away however, Im in Sweden. 😀

Can you take some very good pictures (front, back, top and bottom) of this adapter and post them please ?

And the last 3, I hope they are clear enough!

Wow! Thank you so much!

I was not aware of the DX2-80 issue. Many of the photos else where show the R1 pin header and I had wondered what it was for. Now we know!

Could I trouble you for one more photo of the under side of the daughter board from directly above? I would very much appreciate it and it would make it a little bit easier to follow the traces as the current underside photo is at an angle.

From what I can see so far, JP2 appears to be 5V pass through, JP5 is ground and JP4 is 3.3v input. The board is double layered so that makes it a bit tricky. The EZ1085CT is interesting. 3 amps seems like overkill for cpus of this era? Perhaps they are playing it safe by not running the voltage regulator it the limit.

In any case, thank you everyone for your replies.

No problem, I hope that these pictures can help you out. Glad to give some info about the jumpers there with the little add-on manual. It gives a little bit of history too and that is fun and not only the technical details that are interesting in its own.

Attaching a better image here, hopefully the angle is better now.