BLINKER EXTMEM BLOCK          Specify extended memory allocation block size
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 Purpose  : Specify the extended memory allocation block size

 Syntax   : BLINKER EXTMEM BLOCK <nuSize>

 Default  : 256

 Example  : # Allocate in 512KB blocks
            BLINKER EXTMEM BLOCK 512

 This command specifies the memory block size (in KB) used by the extender
 when allocating extended memory blocks. When running in protected mode, the
 extender allocates memory from the host in blocks of the specified size and
 manages these blocks itself.

 When a DOS extended program requests memory, it is allocated memory from
 these extender managed blocks, rather than directly from the host. Programs
 which allocate large amounts of memory may benefit from a larger block size
 than the 256 KB default.

 Note also that the BLINKER environment variable setting /EBnnnn will
 override this function.