Transfer data between pic16f877a and 8085

Can anyone help me with how to transfer a continuous stream of 10 byte data from pic16f877a to 8085 continously ? There has to be bidirectional data transfer one at a time, hence in mode 0. Also parallel port is to be used so have to use a 8255 in between. I have been having trouble with programming this. Please help if anyone has any ideas.