MOS 6581     0384    KOREA       AH513558
MOS 6581     1984    KOREA       AH115102             (54)
MOS 6581 CBM 3684    TAIWAN      GH335554 2           (A/42)
MOS 6581R3   3985    KOREA       AH383856 3           (76)
MOS 6581R4AR 2286 S  HONG KONG   HH205105       HC-30 (59)