This is the flash BIOS update for the Dysan/Memorex CRW-1622 CD-R/RW drive. It was retrieved from the Memorex site on 26 March 2000 and successfully installed on a Dysan drive. Once updated the drive will report tht it is a Memorex, but it will work properly. Be sure to read the "Readme" file and follow the procedure exactly or you may ruin your drive. Otherwise...works well.