RCA 70/46 Reference Manual page 104

Notes
(Cont'd)
Privileged
Instructions
6. If an address of the Block Address Table specified by the General
Register designated by Rl is not on a full word boundary, an Address-
ing Interrupt condition occurs. The operation is suppressed with
the operands unchanged.
7. If a location outside the available memory is addressed, an Address-
ing Error Interrupt condition occurs. The operation is terminated
with unpredictable results.
8. The format of the halfword in main memory from which the trans-
lation entry is copied is:
WGUSEMXXXPPPPPPH
9. The format of the Translation Table entry in the translation memory
is specified under the Translation Memory description in this
manual.
10. The format of the translation memory entry is specified under the
Addressing description in this manual.
11. If the block address specified in Block Address Table entry is not on a
halfword boundary, an Addressing Interrupt condition occurs. The
operation is terminated with unpredictable results.
12. If this Special Function is attempted under any of the following
conditions, a Paging Error Interrupt condition occurs and the Special
Function is terminated with unpredictable results:
a. If either the address of the Block Address Table or the block
address in a Block Address Table entry specifies a nonexistent
translation nlemory element (i.e., the two unused bits of the
segment field of a virtual address are not zeros).
b. If either the address of the Block Address Table or the block
address in a Block Address Table entry specifies a 2,048-byte
page in the high-order address half of a 4,096-byte page.
c. If either the address of the Block Address Table or the block
address in a Block Address Table entry specifies a page that is
not writable.
13. If this Special Function is attempted with either a Block Address
Table address or the block address of a Block Address Table entry
specifying a nonutilizable page, a Paging Queue Interrupt condition
occurs and the instruction is terminated with unpredictable results.
14. The contents of the Translation Table being loaded to the translation
memory do not cause a Paging Queue or Paging Error Interrupt
condition.
15. If the translation memory block size count is greater than the
individual Block Address Table item count (N) that individual block
scan and store is cOlnpleted when the N -halfwords have been stored.
16. The contents of the translation memory being stored into memory
do not cause a Paging Queue condition or Paging Error Interrupt
condition.
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