pic as ps/2 keyboard

[mischl]

hello

i want change out a ps/2 keyboard with a pic and searched for informations. has anyone links or informations to the clock speed and the data transmission?

many thanks

[NavMicroSystems]

see:
here
and
here

[mischl]

thank you ralph for the reply

what i'm not sure :
- i need no external hardware, or?
- i can realise the software with shiftout?

[NavMicroSystems]

mischl,

this is probably the link you are after

[mischl]

ralph, thanks for the help.

i've looked for many sites and found asm as well bs examples. i read a lot about protocols and test my own code. because i have several problems and i'm a bit confused my question : has anybody else a piece of code which send at-keyboard commands to pc host?

if it is only a piece to test, it would me helps a lot

thanks for a support

[JEC]

I had a PS/2 KB emulator running a few weeks ago. I don't have the code right in front of me, but I wrote it all in PBP.

You can use the SHIFTOUT command with no problems - just tell shiftout to only send 9 bits instead of 16.

Don't forget to calculate the parity bit (odd) and tack it on at the end.

Clock and data both idle high, so make sure you use pullup resistors.

I'll dig around and see if I can find the code later this afternoon.

John