Flashrom fails to write - Sun Ultra 40 M2

[Nick]

DMI string system-manufacturer: "Sun Microsystems"
DMI string system-product-name: "Sun Ultra 40 M2 Workstation"
DMI string system-version: "11"
DMI string baseboard-manufacturer: "Sun Microsystems"
DMI string baseboard-product-name: "Sun Ultra 40 M2 Workstation"
DMI string baseboard-version: "50"

nForce Pro 3600 / MCP55, SMSC SuperIO

Verbose output when flashing coreboot -
http://paste.flashrom.org/view.php?id=880
Verbose output when flashing original Sun BIOS image -
http://paste.flashrom.org/view.php?id=881

lspci -nnvvvxxx output - http://paste.flashrom.org/view.php?id=883
superiotool -deV output - http://paste.flashrom.org/view.php?id=884

Original Sun Ultra 40 M2 BIOS image -
http://paste.flashrom.org/view.php?id=882