Configuration constant that determines which kind of memory will be used for dynamic memory allocation by stMemAlloc function. When the value is set for 1, global buffer will be created with size specified in ST_MALLOC_SIZE, which by default is set to 8192 bytes (8 KB). When this value is set for 0, it is required to determine the address of the memory base in ST_MALLOC_BASE_ADDRESS and the memory size in ST_MALLOC_SIZE (which will not have default value in this case and must be specified).

SpaceShadow documentation