Memory Addressing
The most common problem by running 8086 code from protected mode is memory addressing which is totally different between protected mode and real mode. As mentioned, by working under VM86 mode the segmentation mechanism is reconfigured to work just like under real mode, but the paging mechanism is still active, and it is transparent to the real mode code; thus, memory protection is still applicable, and so is the isolation of the address space.
Read more about this topic: Virtual 8086 Mode
Famous quotes containing the words memory and/or addressing:
“A man of sense, though born without wit, often lives to have wit. His memory treasures up ideas and reflections; he compares them with new occurrences, and strikes out new lights from the collision. The consequence is sometimes bons mots, and sometimes apothegms.”
—Horace Walpole (1717–1797)
“But what is quackery? It is commonly an attempt to cure the diseases of a man by addressing his body alone. There is need of a physician who shall minister to both soul and body at once, that is, to man. Now he falls between two stools.”
—Henry David Thoreau (1817–1862)