Srinivas.

I am working presently in a similar project, for educational purposes, that includes the connection of several PC peripherals to an 80C537 uC: An AT keyboard, a serial mose-system mouse, an IDE (ATA) HD driver and maybe an old CGA or EGA monitor. The project also includes some instrumentation applications such as a capacimeter and a bipolar transistor tester.

My AT keyboard sub-project is exactly in the same stage than yours, the uC already receives frames from the keyboard but does not send frames to.

Maybe we might share some information and/or experience.

Regards,

Alfredo del Río.