I've been trying to get the serial port working on my DG41MJ motherboard. It's enabled in the bios, and connected to the back panel by a straight through serial adaptor cable (10pin header to 9pin rs232). After not much luck I eventually got round to comparing the output current at the pins with an older working machine and noticed a difference.
On my DG41MJ I get a current between pin2 (RxD) and pin5 (ground) however on my older machine I get a current between pin3 (TxD) and pin5 (ground).
Does anybody know why this is? I'm assuming this is why I can't get any of my serial peripherals to work if the input and output channels are inverted.