<Li> Hard disk (obsoleted by PIO modes, and replaced by UDMA modes), Parallel Port (ECP capable port), certain SoundBlaster Clones like the OPTi 928 . </Li> <Li> Cascade from XT DMA controller, </Li> <Li> Hard Disk (PS / 2 only), user hardware for all others, usually sound card 16 - bit DMA </Li> <Li> User hardware . </Li>

Use of dma controller in a computer system