5AX
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Memory
The category is display-only which is determined by POST (Power On Self Test)
of the BIOS.
Base Memory
The POST of the BIOS will determine the amount of base (or
conventional) memory installed in the system.
The value of the base memory is typically 512 K for systems with 512 K
memory installed on the motherboard, or 640 K for systems with 640 K
or more memory installed on the motherboard.
Extended Memory
The BIOS determines how much extended memory is present during
the POST.
This is the amount of memory located above 1 MB in the CPU's memory
address map.
Expanded Memory
Expanded Memory in memory defined by the Lotus / Intel / Microsoft
(LIM) standard as EMS.
Many standard DOS applications can not utilize memory above 640, the
Expanded Memory Specification (EMS) swaps memory which not
utilized by DOS with a section, or frame, so these applications can
access all of the system memory.
Memory can be swapped by EMS is usually 64K within 1 MB or
memory above 1 MB, depends on the chipset design.
Expanded memory device driver is required to use memory as
Expanded Memory.
Other Memory
This refers to the memory located in the 640 to 1024 address space.
This is memory that can be used for different applications.
DOS uses this area to load device drivers to keep as much base
memory free for application programs. Most use for this area is Shadow
RAM.
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