82371MX

The 82371MX PCI I/O IDE Xcelerator (MPIIX) provides the bridge between the PCI bus and the ISA-like Extended I/O expansion bus. In addition, the 82371MX has an IDE interface that supports two IDE devices providing an interface for IDE hard disks and CD ROMs.

The 82371MX MPIIX integrates many common I/O functions found in ISA based PC systems-a seven-channel DMA controller, two 82C59 interrupt controllers, an 8254 timer/counter, Intel SMM power management support, and control logic for NMI generation. Chip select decoding is provided for BIOS, real time clock, and keyboard controller. Edge/Level interrupts and interrupt steering are supported for PCI plug and play compatibility.

The 82371MX MPIIX also provides the Extended I/O Bus for a direct connection to Super I/O devices providing a complete PC-compatible I/O solution. MPIIX also provides support for the "Mobile PC/PCI" DMA Expansion protocol that enables the implementation of Docking Stations with full ISA and PCI capability without running the full ISA bus across the docking connector. For motherboard Plug-n-Play compatibility, the 82371MX also provides three steerable DMA channels, up to three steerable interrupt lines, and a programmable chip select. The interrupt lines can be routed to any of the available ISA interrupts. The MPIIX's power management function supports SMI# interrupt sources, extensive clock control (including Auto Clock Throttling), peripheral power idle detection with access traps, system Suspend-to-DRAM and Suspend-to-Disk.