[MinnowBoard] Coreboot Payload not loaded

[Bill Traynor]

Trying to get Coreboot + SeaBIOS working on my MMAX(A2) but I'm stuck
at the error:

Payload being loaded below 1MiB without region being marked as RAM usable.
Bounce Buffer at 00000000, 437408 bytes
Could not find a bounce buffer...
Payload not loaded.

This message: https://www.coreboot.org/pipermail/coreboot/2014-September/078634.html
indicates that "This happens if you make a ROM image without the IFD
(Intel Flash Desciptor)...Ref: review.coreboot.org/#/c/5792/  We need
to preserve the existing Intel Flash Descriptor & TXE binary."

The wiki has a workaround for this here:
http://wiki.minnowboard.org/Coreboot#Building_without_TXE.2FSPI_descriptor
so I did:

echo 00500000:007fffff coreboot > regions.txt

But when I flash the board with:

sudo flashrom -p ft2232_spi:type=2232h,port=A,divisor=4 -l regions.txt
-w build/coreboot.rom and boot.

It hangs at this "Payload not loaded" message.

Is the work around still valid?  Any thoughts on where I'm going wrong?

Thanks
Bill