Dell PowerVault 770N (Deskside NAS Appliance) - Manual (Page 26)

COM1, COM3: IRQ4 (shared setting)
COM2, COM4: IRQ3 (shared setting)
These COM ports have the following I/O address settings:
COM1: 3F8h
COM2: 2F8h
COM3: 3E8h
COM4: 2E8h
For example, if you add an internal modem card with a port configured as COM1, the system then sees logical COM1 as the
address on the modem card. It automatically remaps the integrated serial port that was designated as COM1 to COM3, which
shares the COM1 IRQ setting. (Note that when you have two COM ports sharing an IRQ setting, you can use either port as
necessary but you may not be able to use them both at the same time.) If you install one or more expansion cards with serial
ports designated as COM1 and COM3, the corresponding integrated serial port is disabled.
Before adding a card that remaps the COM ports, check the documentation that accompanied your software to make sure
that the software can be mapped to the new COM port designation.
To avoid autoconfiguration, you may be able to reset jumpers on the expansion card so that the card's port designation
changes to the next available COM number, leaving the designation for the integrated port as is. Alternatively, you can disable
the integrated ports through the System Setup program. The documentation for your expansion card should provide the
card's default I/O address and allowable IRQ settings. It should also provide instructions for readdressing the port and
changing the IRQ setting, if necessary.
For general information on how your operating system handles serial and parallel ports, and for more detailed command
procedures, see your operating system documentation.
Keyboard and Mouse Connectors
The system uses a PS/2-style keyboard and supports a PS/2-compatible mouse. Cables from both devices attach to 6-pin,
miniature DIN connectors on the back panel of your system.
NOTE: Mouse driver software can give the mouse priority with the microprocessor by issuing IRQ12 whenever a new
mouse movement is detected. The driver software also passes along the mouse data to the application program that is
in control.
NOTE: Your system is a "headless" system that is managed through the onboard Ethernet connection; the system
operates without a keyboard, monitor, or mouse. While it is possible to connect these peripherals to the system, it is
generally not necessary unless you are troubleshooting the system.
Keyboard Connector
The following information is pin information for the keyboard connector. Figure B-4 illustrates the pin numbers for the
keyboard connector. Table B-3 defines the pin assignments and interface signals for the keyboard connector.
Figure B-4. Pin Numbers for the Keyboard Connector
Table B-3. Keyboard Connector Pin Assignments
Pin Signal I/O Definition
1 KBDATA I/O Keyboard data
2 NC N/A No connection