CompuServe Messages

John, Non-DMA controllers require the use of the CPU to transfer data from the drive into memory…thus slowing down anything else going on in your Amiga at the time. As a general rule…it's also slower than DMA. DMA (Direct Memory Access) controllers don't need the CPU to access memory…they can do it all by themselves so the CPU isn't slowed doing the data transfer. There are quirks with either method…but as a general rule, DMA is the better way to go. Don