IĞm working with the PIC16C715.  It has 13 I/O lines but I got to
manipulate one LCD, read some extern values and control some devices.

        I just want to be sure about the best way that I can add some I/O lines
(Ports) with other devices like 82C55, because IĞm not sure now if IĞm
going to need it.

        What good device can I use with this PIC to add one or two Ports of 8
lines ?.

        and with the LCD stuff:

        What way is better: control it with 4 bit mode or 8 bit mode ?

        Thanks to the peoples that can help me out with this.