       *=$PRINTV›  .WORD  PHOPEN-1 ; DEVICE OPEN›  .WORD  PHCLOS-1 ; DEVICE CLOSE›  .WORD BADST-1 ; DEVICE READ-NOT IMPLEMENTED›  .WORD  PHWRIT-1 ; DEVICE WRITE›  .WORD  PHSTAT-1 ; DEVICE STATUS›  .WORD  BADST-1 ; SPECIAL-NOT IMPLEMENTED›  JMP PHINIT ; DEVICE INITIALIZATION›
