System for transferring first and second ring information from p

Details System for transferring first and second ring information from p System for transferring first and second ring information from p

1992-06-17

1993-04-06

Lee, Thomas C.

Boots, shoes, and leggings

364DIG1, 3642864, 364285, 3642466, 364247, 3642412, 395425, 395375, G06F 1214

Patent

active

052010520

ABSTRACT:
A microprocessor provides a CPU to execute a program and a register to store a program status word indicative of a status of the program being executed by the CPU. The program status word includes ring information on the program being executed. A store buffer is provided with write data to be written into an external memory and a corresponding address when the CPU executes a write instruction. The store buffer has a specific area in which ring information on the write instruction is stored. A control part reads out the write data and address from the store buffer and writes the same into the external memory independent of execution of the program by the CPU.

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