Otherwise, any interrupt raised while the execution of the instructions will not be handled by the microprocessor. Direction Flag (DF): This flag is used for string operations. If this flag is set, the string will be read from higher-order bits to lower order bits and vice versa. ...
In each of these execution modes, addressable memory is organized in segments of logically associated instructions/data--the real and virtual 86 execution modes are used to emulate 8086 segmentation which uses a formula-based address calculation method, while protected mode uses a 286/386/486 segmen...