#define SYS_halt 0 /* Halts the operating system. */
#define SYS_exit 1 /* Terminates this process. */
#define SYS_exec 2 /* Start another process. */
-#define SYS_join 3 /* Waits for a child process to die. */
+#define SYS_wait 3 /* Waits for a child process to die. */
#define SYS_create 4 /* Creates a file. */
#define SYS_remove 5 /* Deletes a file. */
#define SYS_open 6 /* Opens a file. */