pan069 wrote on 2020-04-12, 01:18:

I have an Asus 486 PVI SP3 motherboard and it has a PS/2 mouse header. However, it didn't came with a PS/2 mouse bracket. So, lo […]
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I have an Asus 486 PVI SP3 motherboard and it has a PS/2 mouse header. However, it didn't came with a PS/2 mouse bracket. So, looking through my parts bin I came across two PS/2 mouse brackets. One of them has a 5 pin connector and won't fit the header on this board (I could make an adapter but I don't have the time for it at the moment). However, the other bracket has this weirdo connector. The board expects the 2x4 pin layout but this connector has a keyed 2x9 connector (see photo). It looks like they just grabbed what was available in the factory or something...

With the machine turned off, the connector does seem to fit (one way, flipped around the unused part of the PS/2 corrector is blocked by the keyboard connector).

Now my questions is; since the PS/2 connector has a 5v connection. Can I safely test this if it was connected the wrong way round? I don't have access to a multi-meter atm.

IMO, it's not safe testing, I broke a mouse doing exactly that. My board had a strange pinout (or the bracket I used did) and the mouse is not working now. After that, I tested with a multimeter and found the pinout of the bracket was very different from the one on the board, yet both were 5x2.

Asus boards with PS/2 connector are like this but you need like this kind that comes on a small PCB with slot bracket and it comes with a ribbon connector. Came with the motherboards.

Cheers,

Remove the pins from that connector and connect them one by one into the appropriate spot on the Asus motherboard header. The pinout should be in the Asus manual, if not, let me know and I'll dig out this information.

For the DIN side of the connector, the pinouts are here: https://en.wikipedia.org/wiki/PS/2_port . Use a multi-meter to see which colour cable goes to which pin on the DIN.

The cables are correctly colored, so just check with a multimeter where the 5V are on the mainboard. This must match with the red wire.

I suspect the bracket is for the ASUS USB/MIR connector as found on their AT motherboards from 1997 onwards.

ShovelKnight wrote on 2020-04-12, 08:33:

I suspect the bracket is for the ASUS USB/MIR connector as found on their AT motherboards from 1997 onwards.

You're right. Digging through my archives it seems the bracket belongs to my Asus P5A-B 😀

I think I'm going to make an adapter for my other PS/2 bracket (the one with the 5 pins).

Thanks guys!