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These following procedures are used to view your current hardware configurations and change them if necessary.
The resulting screen displays a row for each device configured on your system, along with its software device driver parameter settings. If there is more than one page of information, you can press the <PgDn>and <PgUp>keys to navigate between pages.
This screen contains eight fields:
If a driver is assigned to an entry, the entry will be either
the device name such as COM Port
, or a driver name
such as asyc
, the driver
for the COM port.
If the device name is UNKNOWN
on an EISA, MCA or PCI system,
this is an entry from NVRAM (Non-Volatile Random Access Memory) indicating
that the DCU cannot assign a driver name.
For example, if you have installed a networking board, but have not
installed the corresponding software for the board,
it will be listed as UNKNOWN
.
If the device name is unused
, this indicates that an
ISA driver is disabled, but the device parameters are retained.
The name of the controller is repeated along with its board ID, the device driver for the controller, the hardware bus type, and (if used by the device driver) the valid values for the Interrupt Priority Level (IPL), interrupt type (ITYPE), interrupt request vector (IRQ), I/O address range, memory address range, DMA channels, bind CPU and Unit. See the System(4dsp) manual page for more information.
Press <Enter> to return to the "Hardware Device Configuration" screen.
If | Then |
---|---|
The parameter is listed on the "Hardware Device Configuration" screen. |
Move the cursor to the field for the parameter you want to change.
Change the parameter by typing over the existing entry, or press <F2> and follow the instructions for using a Choices menu that follows this table. |
You want to change the Bind CPU, unit number, IPL, or ITYPE parameter values, or any optional device-specific parameters. |
Press <F7> to display the "Advanced Parameter
Selection" screen.
Move the cursor to the field for the parameter you want to change. Change the parameter by typing over the existing entry, or press <F2> and follow the instructions for using a Choices menu that follows this table. |
The following list explains how to use the Choices menu:
If multiple devices have the same IRQ or DMA values, overlapping I/O address ranges, or overlapping memory address ranges, the system may not boot or might be unable to access some hardware.
To prevent this from happening, active devices must have unique
IRQ and DMA values, as well as I/O and memory address ranges
that do not overlap.
(Active devices are all the
controllers listed on the "Hardware Device Configuration" screen
whose first field does not contain the value N
(No) and whose second field does not contain the value
unused
or unknown
.)
The only exceptions are controllers that support shared IRQ values. When multiple controllers share the same IRQ values, the software device drivers for these controllers must operate at the same IPL. For example, two DPT controllers, supported by the same device driver, will operate at the same IPL. In addition, software device drivers of the same class such as HBA drivers will operate at the same IPL.
unused
by following the instructions in Step 3.
This step is useful if you plan to add the controller to your system again later, because you will not have to enter its hardware configuration data again. It is also useful if you want to temporarily disable all peripherals attached to a controller. This is only applicable for non-ISA controllers if the controller remains physically installed on your system; parameters are automatically deleted when non-ISA controllers are removed from the system.
If the device driver has a verification routine, pressing <F4> will run the routine and report whether the parameters you specified are correct.