multipal serial ports

Hi there
I need to build a series comms repeater. I require 2 and in future maybe a third port, my problem is that I need to use even parity and serin does not support it. I could be fine with a chip that has 2 uarts in but what if I need a third

Any suggestions

SERIN2 can use even parity.

But since it can't transmit at the same time it's receiving,
it'll be a whole lot easier with USART's

İf you want to communicate many chip.You will use RS485 protocol.But when device send data dont able to recive data at same time.

http://www.denizelektronik.com/rs485.htm

RS232-RS485 converter