Now you can try to buy a male mini din 7 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and female din 5 connector or female mini din 6 connector (depending on the keyboard you want to use): https://www.ebay.it/itm/392372501387?hash=ite … ABk9SR-SUmqr8YQ , get some 4 wire cable and make an adapter.

mkarcher wrote on 2023-05-03, 17:12:

Not on a keyboard. On a PS/2 extension cord. Like this product: https://www.amazon.de/Goobay-Tastatur-Maus-Ve … r/dp/B000YIVN4A […]
Show full quote

biessea wrote on 2023-05-03, 17:07:

So my friend you suggest me to modify the ps2 connector in one of mine keyboards removing the plastic plug, amd that's all?

Not on a keyboard. On a PS/2 extension cord. Like this product: https://www.amazon.de/Goobay-Tastatur-Maus-Ve … r/dp/B000YIVN4A

Modifying a keyboard does a permanent change to the keyboard. An extension cord is disposable and you can leave your keyboard intact.

biessea wrote on 2023-05-03, 17:07:

Probably replace the 7 pin connector that it's on now with a ps2 connector could be the best way isn't it?

If a 6-pin socket does fit, it could be a very good option. We don't know whether a 6-pin socket fits.

Perfect I understood. But I have an old keyboard that doesn't mine nothing to me and I could modify that one instead buying that extension cable isn't it?

Anyway if I have an extension cable it will last forever with that modify and I can eventually use for future uses, even if I am quite sure I will never go through a connector like this one.

I will demount the computer with attention and I will extract the motherboard so I can take some photos.

And then we could decide if it fits or not.

If you have any other help I'm here.

bogdanpaulb wrote on 2023-05-03, 17:30:

Now you can try to buy a male mini din 7 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and female din 5 connector or female mini din 6 connector (depending on the keyboard you want to use): https://www.ebay.it/itm/392372501387?hash=ite … ABk9SR-SUmqr8YQ , get some 4 wire cable and make an adapter.

yeah, but It seems difficult to make that adapter with four wires isn't it? Or it's easy to solder on these connectors?

If you have a old keyboard , then buy only the male mini din 7 connector cut the old connector and put it directly on your keyboard.

mkarcher wrote on 2023-05-03, 17:09:

I think this is the correct pinout instead: […]
Show full quote

bogdanpaulb wrote on 2023-05-03, 16:57:

The if the measurements from first page are correct (please make sure again), this should be the pinout.

I think this is the correct pinout instead:

pinoutX.jpg

The "GROUND" assignment of the +5V pin in the first post happened, because the internal resistance / leakage current on the unpowered 5V rail is low enough to make the meter beep in continuity test mode. The 38 Ohm measurement clearly shows that this pin is not ground. 30-70 ohms is a common measured value on +5V on AT main boards.

I asked him to do a 'live' (with power on) measurement at step 2, so unless there was a mistake, there was no 5v present at the '38 ohm' pin. But i also think that he should do a re-measurement with the voltmeter on that pin and ground with the computer powered on as i stated before, just to be sure we got this right and have no issues later.

biessea wrote on 2023-05-03, 17:31:

bogdanpaulb wrote on 2023-05-03, 17:30:

Now you can try to buy a male mini din 7 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and female din 5 connector or female mini din 6 connector (depending on the keyboard you want to use): https://www.ebay.it/itm/392372501387?hash=ite … ABk9SR-SUmqr8YQ , get some 4 wire cable and make an adapter.

yeah, but It seems difficult to make that adapter with four wires isn't it? Or it's easy to solder on these connectors?

It's way easier and less work involved to replace the keyboard male connector( the one on the wire ), all you need is this: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh , then to replace the female connector on the motherboard.

bogdanpaulb wrote on 2023-05-03, 19:17:

biessea wrote on 2023-05-03, 17:31:

bogdanpaulb wrote on 2023-05-03, 17:30:

Now you can try to buy a male mini din 7 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and female din 5 connector or female mini din 6 connector (depending on the keyboard you want to use): https://www.ebay.it/itm/392372501387?hash=ite … ABk9SR-SUmqr8YQ , get some 4 wire cable and make an adapter.

yeah, but It seems difficult to make that adapter with four wires isn't it? Or it's easy to solder on these connectors?

It's way easier and less work involved to replace the keyboard male connector( the one on the wire ), all you need is this: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh , then to replace the female connector on the motherboard.

Yes, sure, but I am not sure to be able to put little wires in the correct position.

How can know which wire to put where? Seeing on the ps2 connector diagram and then compare with the mini din 7 pin one?

Can you make an image for me to how to do that?

Tomorrow I will test with computer on and voltage mode the connector.

Your spare keyboard is ps2? If so i will make a diagram for you. Just measure that pin when the computer is on so we can be sure. Imagine that if you find hard to solder 4 wires on that mini din plug, removing something like this: https://www.ebay.com.au/itm/394052954656 from the motherboard is way harder and i don't think the female mini din 7 connector is pin compatible with the female mini din 6 connector, so more work. Also when you cut the cable with the old connector from the keyboard, be sure to leave about 2cm/1inch of wire on the connector so i can be able to understand the color scheme for the pin out (it's not always standard and can be different sometimes).

bogdanpaulb wrote on 2023-05-03, 23:48:

Your spare keyboard is ps2? If so i will make a diagram for you. Just measure that pin when the computer is on so we can be sure. Imagine that if you find hard to solder 4 wires on that mini din plug, removing something like this: https://www.ebay.com.au/itm/394052954656 from the motherboard is way harder and i don't think the female mini din 7 connector is pin compatible with the female mini din 6 connector, so more work. Also when you cut the cable with the old connector from the keyboard, be sure to leave about 2cm/1inch of wire on the connector so i can be able to understand the color scheme for the pin out (it's not always standard and can be different sometimes).

Perfect I understood.

Now I power on and measure another time the voltage like you and Michael asked me for;

And I will let you know.

bogdanpaulb wrote on 2023-05-03, 17:30:

Now you can try to buy a male mini din 7 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and female din 5 connector or female mini din 6 connector (depending on the keyboard you want to use): https://www.ebay.it/itm/392372501387?hash=ite … ABk9SR-SUmqr8YQ , get some 4 wire cable and make an adapter.

This part isn't clear for me.

This suggestion was if only I don't want to cut the keyboard cable isn't it?

And can you explain this more? I really cannot get into it.

Ok, I just measured the voltages with the computer ON and this is the results;

before I signed TWO Grounds, when I think it's only one, the pin on the middle right.

I put the image of what I measured. Hope the situation is now more clear.

biessea wrote on 2023-05-04, 09:45:

This part isn't clear for me. […]
Show full quote

bogdanpaulb wrote on 2023-05-03, 17:30:

Now you can try to buy a male mini din 7 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and female din 5 connector or female mini din 6 connector (depending on the keyboard you want to use): https://www.ebay.it/itm/393393451469?hash=ite … ABk9SR-q-3en8YQ , get some 4 wire cable and make an adapter.

This part isn't clear for me.

This suggestion was if only I don't want to cut the keyboard cable isn't it?

And can you explain this more? I really cannot get into it.

That re-measurement confirms this:

mkarcher wrote on 2023-05-03, 17:09:

I think this is the correct pinout instead: […]
Show full quote

bogdanpaulb wrote on 2023-05-03, 16:57:

The if the measurements from first page are correct (please make sure again), this should be the pinout.

I think this is the correct pinout instead:

pinoutX.jpg

The "GROUND" assignment of the +5V pin in the first post happened, because the internal resistance / leakage current on the unpowered 5V rail is low enough to make the meter beep in continuity test mode. The 38 Ohm measurement clearly shows that this pin is not ground. 30-70 ohms is a common measured value on +5V on AT main boards.

Yes, that was a 'parts' list to build an adapter similar to this(not identical): https://www.microconnectors.com/ps-2-to-at-ke … -to-din-5-male/ and keep your keyboard without any modifications. The advantage of an adapter like that is that it will allow you in the future to replace the keyboard easily if you need it. Just replacing the mini din male connector on the keyboard cable will work also, but if something happens to that keyboard, when you replace it you will have to replace the connector again.

For just replacing the connector on the keyboard cable you will need only this: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh , if you what to build a ps2 adapter you will need 1 male mini din 7 connector, 1 female mini din 6 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and a piece o cable with 4 wires internally (you can salvage that from a usb data cable or something similar).

Let me know on what approach you decide.

bogdanpaulb wrote on 2023-05-04, 11:50:

That re-measurement confirms this: […]
Show full quote

biessea wrote on 2023-05-04, 09:45:

This part isn't clear for me. […]
Show full quote

bogdanpaulb wrote on 2023-05-03, 17:30:

Now you can try to buy a male mini din 7 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and female din 5 connector or female mini din 6 connector (depending on the keyboard you want to use): https://www.ebay.it/itm/392372501387?hash=ite … ABk9SR-SUmqr8YQ , get some 4 wire cable and make an adapter.

This part isn't clear for me.

This suggestion was if only I don't want to cut the keyboard cable isn't it?

And can you explain this more? I really cannot get into it.

That re-measurement confirms this:

mkarcher wrote on 2023-05-03, 17:09:

I think this is the correct pinout instead: […]
Show full quote

bogdanpaulb wrote on 2023-05-03, 16:57:

The if the measurements from first page are correct (please make sure again), this should be the pinout.

I think this is the correct pinout instead:

pinoutX.jpg

The "GROUND" assignment of the +5V pin in the first post happened, because the internal resistance / leakage current on the unpowered 5V rail is low enough to make the meter beep in continuity test mode. The 38 Ohm measurement clearly shows that this pin is not ground. 30-70 ohms is a common measured value on +5V on AT main boards.

Yes, that was a 'parts' list to build an adapter similar to this(not identical): https://www.microconnectors.com/ps-2-to-at-ke … -to-din-5-male/ and keep your keyboard without any modifications. The advantage of an adapter like that is that it will allow you in the future to replace the keyboard easily if you need it. Just replacing the mini din male connector on the keyboard cable will work also, but if something happens to that keyboard, when you replace it you will have to replace the connector again.

For just replacing the connector on the keyboard cable you will need only this: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh , if you what to build a ps2 adapter you will need 1 male mini din 7 connector, 1 female mini din 6 connector: https://www.ebay.it/itm/263066804942?hash=ite … %3ABFBMuoaMqvxh and a piece o cable with 4 wires internally (you can salvage that from a usb data cable or something similar).

Let me know on what approach you decide.

Yes, another time my friend Michael knows exactly what he is speaking. Great man.

I have to admit bogdan that I will sure prefer to make an adaptor for me and for the user Who will bought the system from me.

So I need the male 7pin mini din and a female 6pin ps2 connector.

Then to connect both of them and make that adapter I will need a cable with 4 wires isn't it?
I didn't know that ps2 connector need only 4 wires to work.

So I buy those two kind of connector and when they'll arrive I will work on them. I think I buy two of each pair.

This will be my approach, so I don't need to disassembly all the system cause is tiny and narrow to put hands on.

And these proprietari flat cable make me worry about. Always associated flat cable to laptop computer, that I hate.

Yes, you can try and get them from here if they are available: https://www.ebay.it/itm/393393451469?hash=ite … ABk9SR-q-3en8YQ

Here is my dear Olivetti keyboard, bought from a giveaway of an italian office of energy delivering (ENEL).

The exact model is ANK 27-102N.

As you can see the PS/2 connector has only 4 poles. I understood now why you told me that only 4 wires is needed for that operation.

Ps: I just bought two connector from a pair, two couple. Nice.

Good, let me know when the connectors arrive.

bogdanpaulb wrote on 2023-05-04, 15:41:

Good, let me know when the connectors arrive.

Sure I will.

bogdanpaulb wrote on 2023-05-04, 15:41:

Good, let me know when the connectors arrive.

Unfortunately these connectors even if it seems an english store, it arrives from China 🙁

So it will take a month to came to me.

paradigital wrote on 2023-04-28, 16:23:

My guess is that it was used for something financial or EPOS like. And the keyboard was possibly custom for that environment.

My father worked for Olivetti during the 80s and 90s and we had no end of weird and wonderful devices in the garage that had come home from work. Keyboards with magstripe readers and passbook readers were a common sight, though I was far too young at the time to go checking if the machines all had standard PS/2 connectors or not.

As his role was customer facing, he’d be demoing for large banks and building societies all the time.

My dad also worked in Olivetti, specifically in the headquarters. He was in the company guard corps, which until the 1990s was considered to be on the same level as the military

In the early 90s they had even welcomed Steve Jobs to visit