found the pin map in my old pbp2.60c notes'

Code:
8       pin  chips   0-7 gpio   8-15  gpio
14/20   pin  chips   0-7 porta  8-15 portc
18      pin  chips   0-7 portb  8-15 porta
28      pin  chips   0-7 portb  8-15 portc
40      pin  chips   0-7 portb  8-15 portc