The MB86613 a high-performance, host-bus (PCI) and serial-bus (1394) controller chip for controlling transfer between the PCI and 1394 buses. This chip conforms to the PCI Standard Version 2.1 for PCI control, the IEEE 1394-1995 Standard for 1394 control, and the Open HCI Standard Version 1.0 for PCI-1394 control. The MB86613 consists of the PCI/DMA, OHCI, and 1394 blocks. The PCI/DMA block provides PCI bus protocol control. The block has the slave function for responding register access from a bus master, the master function for issuing transfer requests from the MB86613 as the bus master, the power management function (compliant with PCI bus power management standard version 1.0), and the interfaces to BIOS ROM and PCI configuration ROM.