OpenTerm interface/protocol

I need to control a boiler from a PC via the OpenTerm protocol. The protocol uses Manchester encoding and some microsecond level timing is required so a PC is not going to cut it. Certainly not if it has other tasks and is nit running a RTOS. An extra piece of hardware will be required.

I've been searching ... and searching but so far I haven't found anything on the net.

I'm now thinking to implement the interface using a microcontroller (PIC) speaking OpenTerm (master) on one end and on the other end TCP/IP, HTTP or maybe ModBus.

Is there anyone who has already done this and is willing to help me with line driver hardware and protocol intricacies?

Thanks in advance.