//  This data structure is the interface between the simulated CPU and the
//  simulated disk. The CPU passes a "DiskTask" to request an action
//  from the disk; the disk returns the same "DiskTask" when that action
//  has been completed.

public class DiskTask {
   int diskAddress, // Address on disk
       memAddress,  // address in RAM
       size;        // number of words to read;
 boolean write;    // true if the request is to write to disk; false if
                   // request is to read from disk

public DiskTask (int da, int mem, int s, boolean wr)
 {  diskAddress = da;
    memAddress = mem;
    size = s;
    write = wr;
}   


}