David Houston wrote:
Which board are you working with?
Sun Workstation 20 Ultra M2, Board has a header (9 pin) which I have attached my IDC serial header to.
Ok. That is an onboard serial port. By port I don't mean DB9 connector, but rather _any connector_. So you are good, if this is your target board. If this is your workstation board then the USB cable is of no use.
My development board EVGA nforce 6 based board with no onboard serial.
Then you lose. The target board must have a real serial port onboard.
You can also check if the chipset implements the EHCI Debug Port, in which case you could use a USB Debug Class Device to communicate with coreboot. This is a particular USB device, and it must be that one. A generic USB-serial converter does not work.
http://www.coreboot.org/EHCI_Debug_Port
A cross-over serial cable, is that the same of different to a null modem cable.
Yep!
//Peter