Appendix - Kingston Technology KTM8000/386 Installation Manual

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Appendix- Extended VS. Expanded Memory
Appendix- Extended VS. Expanded Memory
Base Memory
Memory from the 0 byte memory up to the
640K limit (OOOOOh-9FFFFh). This memory
area is usable by DOS for programs and
data.
Memory Reserved
Memory addresses of 64OK-1024K (AOOOOh-
FFFFFh) can not be addressed by user.
This area is reserved for programs used by
the system in order for the computer to
function. It is also used as the I/O port ad-
dress area for EXPANDED MEMORY
(called page frame). Also, the memory ad-
dresses of 16256K to 16364K (FEOOOOh-
FFFFFFh) are also reserved for system use.
Extended Memory
Memory from 1 to 16 megabyte memory ad-
dress (lOOOOOh-FFFFFFh). This area can be
used by the user application to store data
and programs. DOS does not recognize
this memory space, but certain programs
can use this memory space (notably the
VDlSK>SYS RAM disk utility and the OS/2
disk operating system).
Expanded Memory
Memory (specification developed by a joint
project of LOTUS, INTEL, and
MICROSOFT) that can be accessed by spe-
cially-modified software in order to over-
come the DOS-imposed OK-64OK (OOOOOh-
KTM-6000/3&j Installation Guide - REV D
Kingston Technology Corporation
9FFFFh) memory address limit for program
data.
This type of memory allows program data
to be as large as 8MB in size (EMS Ver.3.2)
or 32MB in size (EMS Ver.4.0).
Expanded memory did not exist when your
computer and its operating system (DOS)
were invented. Because of this, DOS itself
cannot recognize and use any expanded
memory space defined on your memory ex-
pansion adapter. In order to use expanded
memory space, you need a special device
driver program that must be run each time
you boot up the computer system. You
also need special software that can use ex-
panded memory space.
On the KINGSTON Option Diskette that ac-
companies your Memory Expansion Adapt-
er, there is a file called KEMM.SYS (under
subdirectory \KTCEMS) that allows you to
access expanded memory space. Regard-
less of how much of extended memory you
have installed that are capable of defining
expanded memory space (up to a maxi-
mum of 15MB of expanded memory
space). You only need to define the num-
ber of expanded memory space that you
think is enough for your purpose.
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