Intel AP440FX 2 82442FX Data Bus Accelerator DBX, 3 82371SB PCI/ISA IDE Xccelerator PIIX3

Motherboard Description

∙Integrated DRAM controller

⎯64/72-bit Non-Interleaved path to memory w/ ECC support

⎯Support for EDO and Fast Page DRAM

⎯8 MB to 256 MB main memory

∙Fully synchronous PCI bus interface

⎯PCI Rev. 2.1 - 5 V interface compliant

⎯25/30/33 MHz

⎯PCI to DRAM > 100 MBps

∙Data Buffering

⎯Host-to-DRAM and PCI-to-DRAM write data buffering

⎯Write combining support for host-to-PCI burst writes

1.7.282442FX Data Bus Accelerator (DBX)

The DBX connects to the 64 bit Pentium Pro processor data bus, the 64/72 bit memory data bus and the 16 bit PMC private data bus. The DBX works in parallel with the PMC to provide a high performance memory subsystem for Pentium Pro processor based computers. The DBX comes in a 208 pin PQF package.

1.7.382371SB PCI/ISA IDE Xccelerator (PIIX3)

The 82371SB provides the interface between the PCI and ISA buses and integrates a dual channel fast IDE interface capable of supporting up to four devices. The 82371SB integrates four 8-bit and three 16-bit DMA channels, three 8-bit timer/counters, two eight-channel interrupt controllers, PCI-to-AT†interrupt mapping circuitry, NMI logic, ISA refresh address generation, and PCI/ISA bus arbitration circuitry together into the same device. The PIIX3 comes in a 208-pin QFP package and provides the following features:

∙Interface between the PCI bus and ISA bus

∙Universal Serial Bus (USB)

⎯Host/Hub Controller

⎯Support for 2 USB ports

∙Integrated fast IDE interface

⎯Support for up to 4 devices with separate Master/Slave mode support

⎯PIO Mode 4 transfers up to 16 MB/sec

⎯Integrated 8 x 32-bit buffer for Bus Master IDE PCI burst transfers

∙Enhanced DMA controller with Fast Type-F DMA

∙Counters/Timers

∙Power Management

⎯Programmable system management interrupt (SMI)

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