Hi, Tim. Since the code you've put in place can recognize the type of SCSI card being used, that code should probably be applied to MDOS in the following manner: 1. During MDOS' starting process, it should look at the card, and set the PDMA flag automatically. 2 .Don't remove the PDMA command, just in case the autodetect somehow makes a mistake. 3. CYA should be able to override the automatic detection process. In most cases, the user should be able to run the distribution version of MDOS without having to set it for their SCSI card. Tony InsaneMultitasker wrote: >Tonight I uploaded MYSPOWER.DSK (mess/v9t9 format) to WHT, which contains >the following programs: > > MYS SCSI Formatter v6.5 > POWER v6.5 >... > >