Owner`s 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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