In the context of IBM PC compatible computers, extended memory refers to memory in the address space of the 80286 and subsequent processors, beyond the 1 megabyte limit imposed by the 20 address lines of the 8088 and 8086. Such memory is not directly available to PC DOS (MS DOS) applications running in the so-called "real mode" of the 80286 and subsequent processors. This memory is only accessible in the protected or virtual modes of 80286 and higher processors.
Read more about this topic: DOS Memory Management
Famous quotes containing the words extended and/or memory:
“All the Valley quivered one extended motion, wind
undulating on mossy hills”
—Allen Ginsberg (b. 1926)
“Oh, how cruelly sweet are the echoes that start
When Memory plays an old tune on the heart!”
—Eliza Cook (1818–1889)