82443Gx Pci/A.g.p. Controller (Pac) (H); Pci/A.g.p. Controller Features; Pci/A.g.p. Controller - Intel MS440GX Product Manual

82443GX PCI/A.G.P. Controller (PAC) (H)

The Intel 82443GX PCI/A.G.P. Controller (PAC) provides the following functions:
Bus-control signals
Address paths
Data paths for transfers between the processor's host bus, PCI bus, the A.G.P., and main
memory.
Table 2 lists the PAC features and the functionality each feature supports.
Table 2.

PCI/A.G.P. Controller Features

Feature
Processor Interface Control
Integrated DRAM Controller
A.G.P. Interface
PCI Bus Interface
Data Buffering
Power Management Functions
SMBus Support for Desktop
Management Functions
Support for System Management
Mode (SMM)
Functionality
Support for processor host bus frequencies of 100 MHz only
32-bit addressing
Desktop optimized GTL + compliant host bus interface
+3.3V only DIMM DRAM configurations
Up to four double sided DIMMs
100 MHz PC100-compatible Synchronous DRAM
DIMM serial presence detect via SMBus interface
2-, 4-, 8-, 16-, 32-, 64-, and 128-Mbit DRAM devices
SDRAM 64-bit data interface with ECC support
Symmetrical and asymmetrical DRAM addressing
Complies with the A.G.P. specification Rev. 1.0
Support for +3.3V A.G.P. 66/133 MHz devices
Synchronous coupling to the host-bus frequency
Complies with the PCI specification Rev. 2.1
Asynchronous coupling to the host-bus frequency
PCI parity generation support
Data streaming support from PCI-to-DRAM
Support for six PCI bus masters in addition to the host PCI-to-ISA
I/O bridge
Support for concurrent host, A.G.P., and PCI transactions to main
memory
DRAM write buffer with read-around-write capability
Dedicated host-to-DRAM, PCI0-to-DRAM, and PCI1/A.G.P.-to-DRAM
read buffers
A.G.P. dedicated inbound/outbound FIFOs (AGP2X), used for
temporary data storage
Support for system suspend/resume and power-on suspend
Compliant with ACPI power management
Motherboard Features
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