/> umka_boot
/> board_get
(empty)
/> board_put d
/> board_get
d
/> board_get
(empty)
/> 
/> board_put h
/> board_put i
/> board_get -ln
hi
/> 
/> board_get -l
/> 
/> board_put a
/> board_put \n
/> board_put b
/> board_put c
/> board_put \r
/> board_put \n
/> board_put \r
/> board_put d
/> board_put e
/> board_put f
/> 
/> board_get -fn
a
bc
def