VOGONS


First post, by vmr_

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Hi,

Came across an interesting Pentium 60/66 motherboard from '94, which has the power connector slightly different than what I encountered until now.

Photos attached.

power connector 2.JPG
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power connector 1.JPG
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power connector 1.JPG
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Is there a specific power source connector/adapter to be used? or the P8/P9 sockets work as well? If the latter, which would be the recommended way to connect, considering the narrow pins the socket has?

Also, socket on motherboard mises one pin (not soldered at all).

Thanks

Retro builds & sandbox
IBM XT 5160 | 286 | 386 | 486 | S4 SI5PI AIO & S4 Batman + P60 SX828
S8 & Pentium Pro 200 | SS7 Asus P5A + AOpen AX59 & AMD K6III+ 550MHz
Slot A Asus K7M Athlon 1Ghz GDF | Slot 1 Pentium III 1GHz SL4KL

Reply 2 of 9, by vmr_

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Noticed P8/P9 sockets have a second row of narrow holes, matching nicely with the narrow pins...

However, to connect it that way, the P8/P9 would switch position (but keeping black wires in the middle).

Retro builds & sandbox
IBM XT 5160 | 286 | 386 | 486 | S4 SI5PI AIO & S4 Batman + P60 SX828
S8 & Pentium Pro 200 | SS7 Asus P5A + AOpen AX59 & AMD K6III+ 550MHz
Slot A Asus K7M Athlon 1Ghz GDF | Slot 1 Pentium III 1GHz SL4KL

Reply 3 of 9, by derSammler

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vmr_ wrote:

Noticed P8/P9 sockets have a second row of narrow holes, matching nicely with the narrow pins...

These holes are for releasing the contact springs, not for connecting to anything.

vmr_ wrote:

However, to connect it that way, the P8/P9 woouls switch position (but keeping black ires in the middle).

Don't even try, the pins are not symmetric.

Could you please show a picture of the whole board? If it's branded, the power connector is probably custom.

Reply 4 of 9, by vmr_

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thanks derSammler, so it is the usual way to connect P8/P9.

Not tried yet, asking first 😀

Retro builds & sandbox
IBM XT 5160 | 286 | 386 | 486 | S4 SI5PI AIO & S4 Batman + P60 SX828
S8 & Pentium Pro 200 | SS7 Asus P5A + AOpen AX59 & AMD K6III+ 550MHz
Slot A Asus K7M Athlon 1Ghz GDF | Slot 1 Pentium III 1GHz SL4KL

Reply 5 of 9, by vmr_

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The board is s Socket 4 one Daewoo branded, have no good photo of it. Need to do a good cleanup first, it is full of dust.

OPTi 82C596 (Cobra) chipset. Board is marked CPC-5200 - but have no other details about it. Would be great if I can find a manual or jumper settings for it.

Retro builds & sandbox
IBM XT 5160 | 286 | 386 | 486 | S4 SI5PI AIO & S4 Batman + P60 SX828
S8 & Pentium Pro 200 | SS7 Asus P5A + AOpen AX59 & AMD K6III+ 550MHz
Slot A Asus K7M Athlon 1Ghz GDF | Slot 1 Pentium III 1GHz SL4KL

Reply 7 of 9, by vmr_

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jmarsh wrote:

That LPT1 connector has seen better days.

Agree, cleanup and straightening some pins here and there 😊

Retro builds & sandbox
IBM XT 5160 | 286 | 386 | 486 | S4 SI5PI AIO & S4 Batman + P60 SX828
S8 & Pentium Pro 200 | SS7 Asus P5A + AOpen AX59 & AMD K6III+ 550MHz
Slot A Asus K7M Athlon 1Ghz GDF | Slot 1 Pentium III 1GHz SL4KL

Reply 9 of 9, by vmr_

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MMaximus wrote:

I've encountered the same problem a while ago:

XT mobo in AT case: questions about PSU connectors

Thanks Mmaximus, this helps. Good intro for my next system on the list - an XT one

On using the AT P8/P9 on the XT-like power socket, it is my understanding the little fins (keys) on P8/P9 face the S-like plastic part of the XT socket.

So for my first photo, P8 is actually on the right, and P9 on the left side of XT power socket.

Retro builds & sandbox
IBM XT 5160 | 286 | 386 | 486 | S4 SI5PI AIO & S4 Batman + P60 SX828
S8 & Pentium Pro 200 | SS7 Asus P5A + AOpen AX59 & AMD K6III+ 550MHz
Slot A Asus K7M Athlon 1Ghz GDF | Slot 1 Pentium III 1GHz SL4KL