What do you mean by term procedure? Differentiate between far call and near call?
PROC: PROC and ENDP directives indicate the start and end of a procedure. These directives force structure as the procedure is clearly defined. PROC directive indicates start of a procedure, should also be followed with a NEAR or FAR. A NEAR procedure is the one that resides in same code segment as the program. A FAR procedure may exist in at any location in the memory system.