memory mapping question

[David M. Siegel]

I was wondering if physical memory is mapped into a portion of the
system address space? In other words, is the VAX 750's CMI main memory
bus mapped into some system address space so that physical memory
locations can be conviently used by either the kernel or a user?

I guess the answer to this question lies in how the Sysmap is setup? 

Thanks,
-Dave