.TITLE MF05 OPEN UP FILE .IDENT /MF05../ ; ; ; ; F$OPEN:: ;THIS PROCEDURE OPEN UP A FILE ; ; ; ENTRY CONDITIONS ; NONE ; ; EXIT CONDITIONS ; STATUS FLAGS ONLY ; ; 10$: SAVE R0 ;PROTECT REGISTER MOV F$FDB,R0 ;HOLD THE FDB ADDRESS FOR THIS FILE CALL .OPEN ;OPEN UP FILE 50$: UNSAVE R0 ;RESTORE REGISTER RETURN ;BACK TO CALLING PROGRAM ; ; .END ; ;