Dell Precision 650 - Manual (Page 19)

NOTE: When two COM connectors share an IRQ setting, you can use either connector as necessary, but you may not be able to use them
both at the same time. If you are running the Microsoft Windows 95 or IBM ® OS/2 ® operating system, you cannot use both serial connectors
at the same time. If the second connector (COM3 or COM4) is also in use, the integrated connector is turned off.
l Parallel Port — The settings are Mode, I/O Address, and DMA Channel.
Mode settings are PS/2, EPP, ECP, AT, or Off. Set the Mode option according to the type of device connected to the parallel
connector. To determine the correct mode to use, see the documentation that came with the device.
I/O Address settings are 378h (default), 278h, or 3BCh. The settings are not available when Mode is set to Off.
NOTE: You cannot set the parallel connector to 3BCh if Mode is set to EPP.
DMA Channel appears only when Mode is set to ECP. Settings are DMA 1, DMA 3, or Off.
l IDE Drive Interface — The settings are Off and Auto (default).
Auto turns off the IDE interface when necessary to accommodate a controller card installed in an expansion slot.
l Diskette Interface — The settings are Auto (default), Read Only, and Off.
Auto turns off the integrated floppy drive controller when necessary to accommodate a controller card installed in an expansion slot.
Read Only prevents the computer's integrated floppy drive controller from writing to floppy drives and activates Auto.
l USB Emulation — The settings are On and Off.
l Primary Video Controller — The settings are Auto and AGP (default).
Auto — If only an AGP card is installed, the computer uses the AGP card; if only a PCI card is installed, the computer uses the PCI
card; if both AGP and PCI cards are installed, the computer uses the PCI card to boot.
AGP (default) — The computer uses the AGP card.
l Video DAC Snoop — The settings are Off (default) and On.
On corrects video problems such as incorrect colors or blank windows that may occur when you use certain video cards.
For the Dell Precision™ Workstation 650 only:
l 1394 Controller — Enabled is the default.
l SCSI Controller — Disabled is the default.
Keyboard NumLock — The settings are On and Off (does not apply to 84-key keyboards).
On — Activates the rightmost bank of keys so they provide the mathematical and numeric functions shown at the top of each key.
Off — Activates the rightmost bank of keys so they provide cursor-control functions shown by the label on the bottom of each key.
Memory Information — Indicates amount of installed memory, computer memory speed, and AGP Aperture size
PCI IRQ Assignment — Specifies which IRQ lines are assigned to the PCI devices installed in the computer
Press <Enter> and then select the device whose IRQ line you want to change, and press the plus (+) or minus (–) key to scroll through the
available IRQ lines.
Power Management —
l Suspend Mode — Selects S1 or S3 (default) power management suspend mode
l AC Power Recovery — Determines what happens when AC power is restored to the computer
¡ Off — The computer remains off when AC power is restored.
¡ On — The computer starts when AC power is restored.
¡ Last — The computer returns to the AC power state existing at the time that AC power was lost.
l Low Power Mode — Selects the amount of power used when the computer is in hibernate mode or off. Disabled is the default. When
Enabled, Remote Wake-Up events no longer start the computer from hibernate mode or off.
Primary Drive n and Secondary Drive n — The settings are Auto (use this setting for all IDE devices from Dell) and Off.
Primary Drive n — Identifies drives attached to the primary IDE interface connector (labeled "IDE1") on the system board.
Secondary Drive n — Identifies drives connected to the secondary IDE interface connector (labeled "IDE2").
NOTE: You must have an IDE device connected to the primary IDE interface if you have an IDE device connected to the secondary IDE
interface.
If You Have a Problem
If the computer generates a drive error message the first time you boot your computer after you install an IDE drive, your drive may not work
with the automatic drive-type detect feature. Press <Alt><d> in any hard drive field to set the hard drive autoconfiguration feature.
During POST the computer scans the IDE channels for supported devices and generates a summary message. For example, if the computer
detects that a hard drive is connected to the Primary channel and that a CD drive is connected to the Secondary channel, the computer
generates the following message:
Performing automatic IDE configuration...
Primary Master: IDE Disk Drive