Keyboard and mouse connectors, Keyboard connector – Dell PowerVault 775N (Rackmount NAS Appliance) User Manual
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7
RTS
O
Request to send
8
CTS
I
Clear to send
9
RI
I
Ring indicator
Shell N/A
N/A Chassis ground
Adding an Expansion Card Containing Serial or Parallel Ports
The system has an autoconfiguration capability for the serial ports. This feature lets you add an expansion card containing a
serial port that has the same designation as one of the integrated ports, without having to reconfigure the card. When the
system detects the duplicate serial port on the expansion card, it remaps (reassigns) the integrated port to the next available
port designation.
Both the new and the remapped COM ports share the same IRQ setting, as follows:
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 expansion card with a port configured as COM1, the system then sees logical COM1 as the address
on the expansion 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 front and back panels of your system.
NOTE:
To enable the front-panel PS-2 connector, a monitor must be connected to the front-panel video connector.
When a monitor is connected to the front panel, the back- panel keyboard, mouse, and video are all disabled.
NOTE:
To connect a keyboard and mouse to the front of the system, either use a PS/2 Y adapter to connect both a
keyboard and mouse to the PS/2 connector, or use a PS/2 keyboard and a USB mouse.
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.
Keyboard Connector
If you reconfigure your hardware, you may need pin number and signal information for the keyboard connector.