A3.2 Page Frame Addressing And Register Output - Everex EV-159 Owner's Manual And Reference Manual

A3.2 Page Frame Addressing And
Register Output
"Paging" is a method of memory mapping that allows a
computer to utilize more memory than it can physically ad-
dress. Paging works because EMS memory divides the
physical memory on an EMS board into pages consisting of
16KB each. These pages are subsequently mapped into an
address space of the CPU; this address is known as a
window. By varying the values of the mapping registers, any
one of the 16KB physical memory pages on the EMS board
can be mapped into the window. The following figure
shows how the mapping is completed.
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