vukhan
08-25-2011, 04:26 PM
Sharing system resources requires operating system to ensure that an incorrect program cannot cause other programs to execute incorrectly.
Provide hardware support to differentiate between at least two modes of operations.
user mode - Execution done on behalf of a user.
Monitor mode - Execution done on behalf of operating system.
Mode bit is added to computer hardware to indicate the current mode : monitor (0) or user (1).
Provide hardware support to differentiate between at least two modes of operations.
user mode - Execution done on behalf of a user.
Monitor mode - Execution done on behalf of operating system.
Mode bit is added to computer hardware to indicate the current mode : monitor (0) or user (1).