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How to make an AT keyboard using 89C51.

Can anyone please help me how can I make a keyboard for my computer using 89C51. I must tell you the I want to make a device that can generate some keycodes itself on PS/2 and that will connect to the PC to perform some specific task for a little time only. i.e. there will be no KEY connected to the 89C51, it will work automatically and will type a few letters and then quit typing. I've seaarched the AT keyboard interfacing, and used the Mode 2 (9-bit UART mode) of 89C51 to implement the protocol, but I am unable to transmit any code to the PC.
Please help.

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  • I couldn't use it in that way. Actually I ahve to change the Bios settings of many Computers at a time, they are around 2000. I need an automatic keyboard that can send commands to enter the setup and the to modify the setup and save changes and exit.
    Please help me in this way.

    Regards.

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  • I couldn't use it in that way. Actually I ahve to change the Bios settings of many Computers at a time, they are around 2000. I need an automatic keyboard that can send commands to enter the setup and the to modify the setup and save changes and exit.
    Please help me in this way.

    Regards.

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