Memory allocation

The shell file bp specifies the sizes (number of words) for the data areas. Initially, the following values are given:

		  set PAREA=1000000    

		  set STACK=1000000    

		  set TRAIL=500000     

		  set TABLE=20000 

The PAREA is the size for the program area, STACK is the total size for the control stack and the heap, TRAIL is the size for the trail stack, and TABLE is the size for the table area. The user can freely update these values.