The M9A is a dual-processor system board that supports the Intel
P54C and P55C CPUs. The board contains an exclusive slot for the
CPU board that carries the 321-pin zero-insertion force (ZIF) CPU
sockets plus the embedded 512-KB pipeline burst second-level
This high-performance 64-bit system board utilizes both the EISA and
the PCI local bus architecture. Two EISA, four PCI bus slots, and one
EISA/PCI shared slot reside on the board to allow installation of either
master or slave devices.
The system board has four DRAM banks composed of eight 72-pin
SIMM sockets that accommodate both fast-page mode and EDO
(extended data output) SIMMs. The sockets support a total of 512-
MB system memory using 64-MB SIMMs.
A 50-pin Fast SCSI-II interface and a 68-pin Wide SCSI interface
come with the system board to connect SCSI devices.
external I/O interfaces include two 9-pin serial ports, one parallel port,
a video port, and keyboard and mouse ports.
The system board supports two optional features that allow better
server management, the ASM Pro and the remote diagnostic
management (RDM). The ASM Pro detects system problems, such
as CPU thermal condition, 5V/3.3V detection, and PCI bus utilization
calculation. The RDM allows execution of a diagnostic program from
a remote station to fix the detected problems or to reboot the system.