FAQ: Fooling pc to think a keyboard is plugged in.

**shinjetko** · 05-21-2006, 12:09 AM

Hi guys,

thank you for helping, I just want to make sure, what I do is right.

So, all I need is a connector (Ps2 style connector (newer)), then I need to use 10k resistor, to soldier between the wire of pin 3 and pin 4 for the keyboard connector right ? After that just plug in the other side of the keyboard on motherboard right ? thank you.

**Bugbyte** · 05-21-2006, 11:43 AM

Umm, right. But if you have to ask the same question three times to make sure that you have figured out how to bridge two wires with a resistor, I'd recommend that you not only don't do it, but seriously reconsider whether you're equipped to install a PC in your car.

There are lots more difficult and fuzzy things about installing a car PC than this three step, very clear tutorial.

**LYHTSPD** · 09-25-2006, 02:15 PM

Would this also work with a ps2 mouse?

**FC3S** · 09-25-2006, 03:36 PM

why would you need to fake the computer into thinking a mouse is plugged in?

what purpose would that serve...?

**DarquePervert** · 09-25-2006, 03:44 PM

Originally Posted by LYHTSPD

Would this also work with a ps2 mouse?

No.

**shotgunefx** · 09-25-2006, 03:58 PM

A PS/2 mouse works similar to a ps/2 keyboard, but sends a CTRL-M so that it knows it's a mouse IIRC.

Take a read at this thread

**LYHTSPD** · 09-25-2006, 04:00 PM

Originally Posted by FC3S

why would you need to fake the computer into thinking a mouse is plugged in?

what purpose would that serve...?

Oh, it is for a completly different application. Nothing at all to do with carPC.

**Termina** · 10-16-2006, 06:07 PM

I've tried twisting the stripped wires from the keyboard around both ends of the resistor (1/4W, 10,000 ohm) but it doesn't work.

Does it actually NEED to be soddered? I've tried just putting it in the PS/2 slot of the motherboard, and it still doesn't work..

can anyone give me a link to the kind of resistors used here, so I can make sure I'm using the right kind?

Mine are Brown, Black, Orange and Gold (color stripes)

**LYHTSPD** · 10-16-2006, 10:48 PM

I honestly don't see how the OP's hardwire method will work with a PS/2 keyboard. From what I have read, a PS/2 keyboard with talk with the motherboad controller back and forth to and uses an initilization sequence to confirm the existince of each other. I am not sure that just using a resistor to drop the voltage across the +5v line will do anything (maybe for an AT style keyboard). My advice is to basically get an old PS/2 keyboard, tear the driver chip out of it and solder it the PS/2 cord. I had to do this with a mouse for my problem in my earlier post and it works like a charm.

**Bugbyte** · 10-17-2006, 07:42 AM

Originally Posted by Termina

I've tried twisting the stripped wires from the keyboard around both ends of the resistor (1/4W, 10,000 ohm) but it doesn't work.

Does it actually NEED to be soddered? I've tried just putting it in the PS/2 slot of the motherboard, and it still doesn't work..

can anyone give me a link to the kind of resistors used here, so I can make sure I'm using the right kind?

Mine are Brown, Black, Orange and Gold (color stripes)

Here is a 10k ohm resisitor:

Brown, black, orange, gold

Are you sure you have the right wires to the right pins? Did you use a multimeter to confirm you have the proper wires or did you guess?