Memory hole at 15m-16m

Solution
The memory hole at the 15-16MiB mark in physical memory is a space reserved for memory mapped IO used by legacy ISA cards. I assume that you're working with a very old computer.

Enable this option if you happen to have an ISA card that needs this region of addresses. If you don't, leave it disabled to increase your available memory by one megabyte.
The memory hole at the 15-16MiB mark in physical memory is a space reserved for memory mapped IO used by legacy ISA cards. I assume that you're working with a very old computer.

Enable this option if you happen to have an ISA card that needs this region of addresses. If you don't, leave it disabled to increase your available memory by one megabyte.
 
Solution