SINPUT
         LDX   #$00
         JSR   GETLN
         STX   :STRLEN    
         CPX   #0
         BEQ   :ZEXIT
:INP_CLR
         LDY   #0
         LDA   :STRLEN    
         STA   RETLEN     
         STA   RETURN     
         INC   RETLEN
:LOOP
         LDA   KEYBUFF,Y  
         INY
         STA   RETURN,Y
         CPY   :STRLEN    
         BNE   :LOOP      ; LOOP
         JMP   :EXIT
:ZEXIT
         LDA   #0
         STA   RETLEN
         STA   RETURN
:EXIT
         RTS
:STRLEN  DS    1