Magic-Pro MP-VIP-4A - Page 28

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3.2.9 Other Memory
This refers to the memory located in the 640K to 1024K address space.
This is memory that can be used for different applications. DOS uses this
area to load device drivers in an effort to keep as much base memory free
for application programs. The BIOS is the most frequent user of this RAM
area since this is where it shadows RAM
.