Still need assistance porting to ASUS P8Z77-M

[Keith Hui]

A week ago I wrote here about my problems trying to port coreboot to
my board. Unfortunately I am still no closer to booting.

In the meantime I flashed my new chip with my OEM firmware backup. It
boots; then I flashed my patched IFD (for chip ID and flash unlock)
and it still boots. So it's not chip compatibility or corrupted
descriptor.

The only sign of life I got is the bootblock banner left in the SPI
console. My PCI POST card is showing nothing, but knowing that it sits
on a PCIe-PCI bridge (ASM1063 that P8Z77M-PRO does not have) and not
knowing if it needs software init to work, I am now trying to pull
POST codes off the LPC bus over the TPM header, using an Arduino Due.
Do I have to add some early init to have port 80 accesses sent to LPC
bus for this to work?

Thanks for your help
Keith