<P> The 640 KB barrier is an architectural limitation of IBM and IBM PC compatible PCs . The Intel 8088 CPU , used in the original IBM PC , was able to address 1 MB ( 2 bytes ) , since the chip offered 20 address lines . </P>
<P> The 640 KB barrier is an architectural limitation of IBM and IBM PC compatible PCs . The Intel 8088 CPU , used in the original IBM PC , was able to address 1 MB ( 2 bytes ) , since the chip offered 20 address lines . </P>
what is the maximum amount of ram that the original pc processor could access
what is the maximum amount of ram that the original pc processor could access
640 KB
640 KB