Labels:bulletin board | dialog box | sky OCR: DOS Environment BIOS queries hard drive using PIO BIOS sets up hard drive PCI Chipset BIOS sets chipset BIOS Operating System Environment oS detects support for DMA Hard IfDMA or Ultra DMA S supported, Read Drive DMA and Write DMA commands are used If DMA or Ultra DMA are not supported, orif the BIOS is not setup correctly the os defaults to PIO ithe
