The KM266-MNB Mainboard
Page 34
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Onboard FDC Controller
Select Enabled if your system has a floppy disk controller (FDC) installed on
the system board and you want to use it. If you install an add-in FDC or
the system has no floppy drive, select Disabled in this field.
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Onboard Serial Port 1/2
These two selection fields allow you to select the I/O address and corre-
sponding interrupts for the first and second serial port.
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UART Mode Select
Your system may offer a variety of infrared modes on the second serial
port. The options are Standard, HPSIR or ASKIR.
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RxD, TxD Active
This field allows you to set the IR reception/transmission polarity as high or
low. To determine which polarity is appropriate you must refer to the docu-
mentation for your IR peripheral.
This field is usually found under the Onboard Serial Port 2 option. If you
disable the Onboard Serial Port 2 option then you will probably not be able
to configure this field.
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IR Transmission Delay
This field allows you to “Enable” or “Disable” the IR Transmission Delay.
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UR2 Duplex Mode
This field appears in an infrared port mode. You have two options: half or
full duplex function. The full duplex mode allows bi-directional transmission
at a single time where as the half duplex mode only allows transmission in
one direction at a time. This setting depends on the nature of your IR pe-
ripheral device. Check the IR device’s manual to determine the appropriate
setting.
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Use IR Pins
To determine the correct settings for the TxD and RxD signals of your IR
peripheral component, you need to consult the components manual.
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Onboard Parallel Port
This item allows you to determine the I/O address and the IRQ for the on-
board parallel port. The default settings are adequate and should not give
you any problems. If they do you can try to change them.
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Onboard Parallel Mode
This field allows you to select an operating mode for the onboard parallel
(printer) port. Select Normal, Compatible, or SPP unless you are certain
your hardware and software both support one of the other available modes.
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EPP Mode Select
This field allows you to choose the EPP version you want to use. We recom-
mend that you use EPP 1.9 for the best performance but if you do you may
have some connection problems so try setting it to EPP 1.7.
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ECP Mode Use DMA
This item allows you to select a DMA channel for the parallel port for use
during ECP.
Managing The PC BIOS
