Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2008-01-29
2008-01-29
Bragdon, Reginald (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S152000
Reexamination Certificate
active
11086762
ABSTRACT:
Memory protection apparatus to protect memory area to realize high interruption response and prohibit from access to the memory area that is previously designated. The memory area data registers132(1) to (m), respectively, retain data which designate the accessible memory area in the processing corresponding to interruption of the group number corresponding to it. Selection circuit133selects any of the memory area data registers132(1) to (m) according to the group number retained by the group number register131, and outputs data that designates selected memory area retained by the memory area data registers132. Address bus watching part106watches generation of illegal memory access of the processor according to the data designating the memory area output by the selection circuit133.
REFERENCES:
patent: 2002/0188852 (2002-12-01), Masaki et al.
patent: 2000-163309 (2000-06-01), None
Bragdon Reginald
Dinh Ngoc
McGinn IP Law Group PLLC
NEC Electronics Corporation
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