Hello Pic Lovers!

I am not an old friend of the PIC.
I have just started to work with PICs 3-4 monts ago.
And recently I bought a 16C84 and a programmer for it(classica
PIcstart16b).
I tried to write a simple programme for scanning 4 x 3 keypad
and to display it in binary format.
But i couldn't succeed in doing it.
Mine main aim is to scan a 4 x 3 or 4 x 4 keypad and
to drive 8 Leds through the same port(Port_B) so as to
use the Port_A for serial communication and to control
a relay.

-> Now can you give me some ideas or source code for scanning
the keypad and driving the leds  through the same port(PORT_B)
or drive them from port_A for the PIC16C84.

  I also tried to run the  applications of the EMbedded
Control Handbook of the Microchip but although i made
some modifications for running it on the PIC16c84 i couln't
be successful to run the programmes. (APNOTE 529; Appendix A
(Multiplexing 7 SEgment decoder part); Appendix B:(multiplexing
 the keypad and the 7-segment part of the 4 channel voltmeter
 application note.)

 - Is there anyone who had run it on the PIC16C84 before or
 can give me  some ideas ?

Thanks for advance...

See you Pic lovers!

REGARDS Tarkan Dogu

Email: dogu@boun.edu.tr