Gateway ALR 9200 Memory Module Connector (I), System Management Connectors, •Parity enabled, •33 MHz bus speed, Plug and Play ready, •Plug and Play ready

PCI slots B4 (top), B3, B2, B1, A3, A2 (H), A1 (K)

The system board has two 32-bit peripheral component interconnect (PCI) bus segments: PCI-A and PCI-B. These provide seven slots for PCI expansion cards: three on PCI-A and four on PCI-B. PCI-B4 is shared with the ISA slot. PCI-A1 supports half-length boards only. The other slots support full-length boards. PCI bus features:

•33 MHz bus speed•32-bit memory addressing•5 V signaling environment•Burst transfers of up to 133 MB/sec•8-, 16-, or 32-bit data transfers

•Plug and Play ready

•Parity enabled

Memory Module Connector (I)

The memory module connector supports the memory module. The memory module is a proprietary card that supports all of the main memory for the system. The memory module is described in “Memory” on page 23.

System Management Connectors

Server Management features are implemented using one microcontroller, the system board management controller (BMC).

The BMC and associated circuitry are powered from the 5 V standby line, which remains active when the system power is switched off.

The primary function of the BMC is to autonomously monitor system management events and log their occurrence in the nonvolatile system event log (SEL). These events include overtemperature and overvoltage conditions, fan failure, or chassis intrusion. While monitoring, the BMC maintains the nonvolatile sensor data record repository (SDRR), from which run-time information can be retrieved. The BMC provides an ISA

16 Maintaining and Troubleshooting the Gateway ALR 9200 Server