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Motherboard Description SY-6BA+ IV
11
1-8.3 ECC Memory
ECC memory detects multiple-bit errors and corrects single-bit errors.
When ECC memory is installed, the BIOS supports both ECC and non-
ECC mode. ECC mode is enabled in the Setup program. The BIOS
automatically detects if ECC memory is installed and provides the Setup
option for selecting ECC mode. If any non-ECC memory is installed, the
Setup option for ECC configuration does not appear and ECC operation is
not available.
1-9 CHIPSET
The Intel 440BX PCIset includes a Host-PCI bridge integrated with both
an optimized DRM controller and an A.G.P. interface. The I/O subsystem
of the 440BX is based on the PIIX4E, which is a highly integrated PCI-
ISA/IDE Accelerator Bridge. This chipset consists of the Intel 82443BX
PCI/A.G.P. controller (PAC) and the Intel 82371EB PCI/ISA IDE
Xcelerator (PIIX4E) bridge chip.
1-9.1 Intel 82443Bx PCI/A.G.P. Controller (PAC)
The PAC provides bus-control signals, address paths, and data paths for
transfers between the processor’s host bus, PCI bus, the A.G.P., and main
memory. The PAC features:
l Processor interface control
Ø Support for processor host bus frequencies of 100 MHz or 66MHz
Ø 32-bit addressing
Ø Desktop Optimized GTL+ compliant host bus interface
l Integrated DRAM controller, with support for:
Ø +3.3 V only DIMM DRAM configurations
Ø Up to four double sided DIMMs
Ø 100-MHz or 66MHz SDRAM
Ø DIMM serial presence detect via SMBus interface
Ø 16-and 64-Mbit devices with 2K, 4K, and 8K page sizes
Ø SDRAM 64-bit data interface with ECC support
Ø Symmetrical and asymmetrical DRAM addressing