FIELD: computer engineering. SUBSTANCE: sequential access memory (SAM) port can be transferred to sequential read (SR) from sequential write (SW) mode through read-transfer (RRT) mode without transferring data for comparing source data with data read out of SAM port during SAM testing. Serviceability check of SAM and RAM ports can be made on laminated device in the course of mass production of two-port storage devices. EFFECT: improved reliability of two-port storage devices due to their serviceability check in the course of manufacture. 3 cl, 9 dwg
