port-amd64/45225: amd64 ISO (cross built on Mac OS X) resets AMD Phenom II machine during boot

[marc%msys.ch@localhost]

>Number:         45225
>Category:       port-amd64
>Synopsis:       amd64 ISO (cross built on Mac OS X) resets AMD Phenom II 
>machine during boot
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 08 14:55:00 +0000 2011
>Originator:     Marc Balmer
>Release:        5.99.55
>Organization:
TNF
>Environment:
>Description:
An ISO image, built on Mac OS X Snow Leopard from a source checkout from August 
8, 2011, 12:00 UTC, and burnt to a CD-ROM will only load the primary bootstrap 
loader, the reset the machine.
>How-To-Repeat:
Built a CD-ROM for amd64 and boot it on a Phenom II machine.
>Fix: