Keyboard Adaptor

[Jamjar74]

I have an old Compaq keyboard which I have used for many years. My new Dell system does not have the correct connection for this. I need a round end to USB connector. Problem is the round end on my keyboard plug has only 4 pins plus the tiny oblong shaped pin. Have tried Maplin and Curry's. Does anyone know where I can get such an adaptor. The only one I have been able to obtain has 6 pin holes plus the oblong one. Hope someone can help. Many thanks.

[fender62]

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https://www.ebay.co.uk/sch/i.html?_odkw=4+pin+to+usb&;_osacat=0&;_from=R40&;_trksid=p2045573.m570.l1311.R2.TR2.TRC0.A0.H0.Xkeyboard+to+usb.TRS0&_nkw=ps2+to+usb+keyboard&_sacat=0

[Jamjar74]

Thank you for the info. I have checked e-Bay before but all their adaptors have 6 pin holes whereas my keyboard plug has only 4-pins plus the little rectangular one. Will the 6 pin version fit the 4-pin version??

[TheChair]

You need a PS2 to USB keyboard adaptor. Like this:
Amazon.co.uk User Recommendation

[Old_Geezer]

Unsure that I recall a 4 pin. PS2 used to have 6 I thought. Although pins 2 and 6 weren't connected. (The older, larger DIN style I think had 5.) Are you sure it's 4 ? If so maybe 2 and 6 have been ommited.