User`s guide

20
Chapter 2: System Processor Board Description
Note: Use DIMMs that have been tested for compatibility with the processor board.
Contactyour salesorsupportrepresentativefor alistofapprovedDIMMs.Table 2-2lists
some sample size combinations.
Peripheral Controllers
The following subsections providea descriptionof theperipheral control devices on the
processor board.
Super I/O Device
The 87309 device supports two serial ports, one parallel port, diskette drive, and
PS/2-compatible keyboard and mouse. The system provides the connector interface for
each port.
Serial Ports
Both serial ports are relocatable. By default, port A is physically the top connector, port
Bonthebottom.Each serial port can be set to one of four differentCOMxports,andeach
can be enabled separately. When enabled, each port can be programmed to generate
edge- or level-sensitive interrupts. When disabled, serial port interrupts are available to
add-in boards.
Table 2-2 Sample DIMM Component Combinations
Bank A (slots J1 - 4) Bank B (slots J5 - 8)
Bank C
(slots J9 - 12)
Bank D
(slots J13 - 16) Total Memory
4 × 64 256 MB
4 × 64 4 × 64 512 MB
4 × 64 4 × 64 4 × 64 4 × 64 1024 MB
4 × 256 1024 MB
4 × 256 4 × 256 2048 MB
4 × 256 4 × 256 4 × 256 4 × 256 4096 MB