HP 64783A, Руководство пользователя

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Status information
The status "U" and "W" can be assigned to an address at any point in its mapping.
You must OR these two status values at each level of the mapping. For example: if
the "W" bit shows "y" at the level of table A, then all of the pages under this entry
in table A are write-protected.
Note that the address shown in the example display was mapped through the
supervisor root pointer. If you wanted to see the mapping through the tables under
the user root pointer, you could choose Display
→
MMU Translations... and click
on MMU Tables in the dialog box; then type in an address, such as 40f8h, in the
field beside Address and select User beside the Function Code option. Or in the
command line, you would use a command like display mmu_translations tables
fcode user 40f8h. You can add the desired function code table index to your
command to see how any address is mapped through the tables under the selected
root pointer (e.g. user or super).
The specific status bits shown beside each table entry are defined as follows:
•
TBL/PAGE indicates the base address of the next table.
•
G means the entry is global.
•
Ux shows the values of the user programmable attributes (signals UPA0 and
UPA1).
•
S means supervisor mode protection.
•
CM identifies the cache mode: cw (cachable, writethrough), cc (cachable,
copyback), is (inhibited, serialized), or in (inhibited, nonserialized).
•
M means the page has been modified.
•
U means the page (or pages) has been used, or previously accessed.
•
W means the page is (or pages are) write-protected.
•
UDT/PDT indicates whether the page at the next level is RESIDENT or
INVALID.
Chapter 10: Using Memory Management
Seeing Details of the MMU Translations
381