Thanks to Bob Nestor's dogged pursuit, Performa 550 users can once again
use X with -current (1.2_BETA) kernels.  This change actually affects any
machine that has internal video located somewhere other than physical
address 0, e.g. some LC and PowerBook models.

The specific problem manifested itself as a blank screen when attempting
to run X, but the kernels worked fine with a straight console and with
recent versions of dt.  If you haven't seen anything on your display at
all when booting, these changes are unlikely to help.

The changes were just committed to the 1.2 release tree, so they should
show up for SUP and ftp by tomorrow.

--scott