IBM Novell 10 SP1 EAL4 - Manual (Page 122)

5.5.2.4.7.2 Prefixing
Prefixing provides the ability to assign a range of real addresses to a different block in absolute memory for
each CPU, thus permitting more than one CPU sharing main memory to operate concurrently with a
minimum of interference. Prefixing is performed with the help of a prefix register. No access control is
performed while translating a real address to an absolute address.
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Figure 5-52: 64-bit or 31-bit Dynamic Address Translation