* Uwe Hermann uwe@hermann-uwe.de [070606 23:57]:
Are you sure your hardware setup is working otherwise? Can you leave the null-modem cable attached as it is right now, but boot a normal Linux system on both ends of the cable? Then run minicom, 115200 BAUD on both sides, and test whether the trasmission itself works?
The south bridge code needs not only the SuperIO ports enabled but also the COM1/COM2 ports. I think Corey's unified ICH code does this.