Abstract: An address generating circuit for accessing a RAM for a CD-ROM device includes line and column counters for counting lines and columns of addresses in the RAM. The address generating circuit also has a memory unit for storing a part of storage addresses of the RAM. The line counter produces a line count value and updates the same. The column counter produces a column count value and updates the same. An accessing unit is coupled to the line counter and the memory unit for accessing the memory unit in response to the line count value to thereby read out a different one of the part of storage addresses stored in the memory unit each time the line count value is updated. An adding unit is coupled to the memory unit and the column counter for adding the column count value to a storage address read out from the memory unit to generate an access address, which is being changed each time the line count value or the column count value is updated to access each of the storage addresses of the RAM.