Service manual

8224 N/B Maintenance

• 32 bit downstream address

• Direct Media Interface asynchronously coupled to core

• Supports 3 Virtual Channels for traffic class performance differentiation

• Supports both snooped and non-snooped traffic

• Supports isochronous non-snooped traffic

• Supports legacy snooped isochronous traffic

• Supports the following traffic types to or from Intel 82801GBM

• Peer write traffic between DMI and PCI Express Graphics port

• DMI-to-DRAM

• DMI-to-CPU (FSB Interrupts or MSIs only)

• CPU-to-DMI

• Messaging in both directions, including Intel Vendor-specific messages

• Supports Power Management state change messages

• APIC and MSI interrupt messaging support

• Supports SMI, SCI and SERR error indication

• Legacy support for ISA regime protocol (PHOLD/PHOLDA) required for parallel port DMA, floppy drive,

and LPC bus masters

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