FPSTR
         PLA
         STA   RETADR
         PLA
         STA   RETADR+1
         PLA
         STA   ADDR1
         PLA
         STA   ADDR1+1
         LDY   #0
         LDA   (ADDR1),Y
         STA   :SLEN
:LP
         INY
         LDA   (ADDR1),Y
         JSR   FCOUT
         CPY   :SLEN
         BNE   :LP
:EXIT
         LDA   RETADR+1
         PHA
         LDA   RETADR
         PHA
         RTS
:SLEN    DS    1