Technical Q&AHW 26 - PCI Type 1 Cycles (15-July-95)Q Under what circumstances does the Macintosh generate a Type 1 cycle? For machines with a single PCI bus, it seems they are never generated. A All of Apple's PCI PowerMac CPUs support hierarchical PCI buses. Depending on the PCI bus environment, the PPC host to PCI bridge (Bandit chip) will generate Configuration Type 0 commands to select a device on the PCI bus where the cycle is being run, and Configuration Type 1 commands to select devices behind a PCI-to-PCI bridge. (Multi-Function PCI cards, for example, use a PCI-to-PCI bridge.) Technical Q&A Previous Question | Contents | Next Question |