Data Integrity; Pci Chip Set - HP Vectra VL5 4 Technical Reference Manual

DATA INTEGRITY

The processor uses a number of techniques to maintain data integrity. It employs two methods
of error detection:
• Data Parity Checking
This is supported on a byte-by-byte basis, generating parity bits for data addresses sent
out of the microprocessor. These parity bits are not used by the external subsystems.
• Internally
The processor uses functional redundancy checking to provide maximum error detection
of the processor and its interface.

PCI CHIP SET

The chip set consists of three devices:
• The PCI, Cache, and Memory Controller (82437FX)
• Two Data Path Units (82438FX)
• The PCI/ISA bridge and IDE controller (82371FB)
The 82437FX and 82438FX2 devices provide the core cache and memory system architecture,
and the PCI interface.
Host Bus
Pentium
Processor
82438FX
Data Path Unit
82438FX
Data Path Unit
Main
Memory
Level-Two
Cache
82437FX PCI, Cache and
Memory Controller
Cache
Controller
Main
Memory
Controller
Write
Buffer
PCI PCI
Master Slave
PCI Bus
82371Fb
PCI/ISA Bridge
PCI
Master
PCI
Slave
APIC
BIOS
ISA Bus
ISA Bus
Controller
IDE
Controller