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FillRAM Command

The FillRAM command instructs RTLoc to remap unused RAM memory. The syntax is:

FillRAM = RegionName

Parameters

RegionName

The name of a physical or virtual region to which all RAM pages remapped from other regions should be appended. You can use this command to create larger regions of consecutive RAM if your RAM address space is fragmented. For example, an AT class computer has RAM from 0 to 640k and some more starting at 1MB. If not all RAM in the region below 640k is used, the unused pages of memory can be appended to the extended memory region above 1MB.

Examples:

Region   LowMem     4k  636k  RAM 
Region   HighMem    1M    3M  RAM 
FillRAM  HighMem

The following example creates a region consisting of remapped pages only:

Region   LowMem     4k  636k  RAM 
Region   HighMem    1M    3M  RAM 

Region   Remapped  16M     0  RAM 
FillRAM  Remapped

or alternatively:

Virtual  Remapped  16M 
FillRAM  Remapped

Remapped RAM can only be used for the program's stack and heap. FillRAM requires paging (see section PageTable for details). Only RAM from Regions with Assign access is remapped through FillRAM.

Defining Target Hardware

Virtual Command