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4. BIOS SETUP
Onboard FDC Swap A+B [No Swap]
This option selects drive letter assignments. Configuration options; [No
Swap] [Swap AB]
Floppy Disk Access Control [R/W]
When set to [Read Only], this field protects files from being copied to
floppy disks by allowing reads from the floppy disk drive but not writes.
The setup default [R/W] allows both reads and writes. Configuration op-
tions: [R/W] [Read Only]
Onboard Serial Port 1 [3F8H/IRQ4], Onboard Serial Port 2 [2F8H/IRQ3]
These fields set the addresses for the onboard serial connectors. Serial Port
1 and Serial Port 2 must have different addresses. Configuration options:
[3F8H/IRQ4] [2F8H/IRQ3] [3E8H/IRQ4] [2E8H/IRQ10] [Disabled]
UART2 Use as [Com Port]
This field is defaulted to activate the extra onboard com port and sets
the second serial UART to support the infrared module connector on the
motherboard. If your system already has a second serial port connected to
the onboard COM2 connector, it will no longer work if you enable the
infrared feature. See Infrared Module Connector in 3.8 External Con-
nectors. Configuration options: [Com Port] [IR] [Smart Card Reader]
Onboard Parallel Port [378H/IRQ7]
This field sets the address of the onboard parallel port connector. If you
disable this feature, Parallel Port Mode and ECP DMA Select configura-
tions will not be available. Configuration options: [Disabled] [378H/IRQ7]
[278H/IRQ5]
Parallel Port Mode [ECP+EPP]
This field allows you to set the operation mode of the parallel port. [Nor-
mal] allows normal-speed operation but in one direction only; [EPP] al-
lows bidirectional parallel port operation; [ECP] allows the parallel port to
operate in bidirectional DMA mode; [ECP+EPP] allows normal speed op-
eration in a two-way mode. Configuration options: [Normal] [EPP] [ECP]
[ECP+EPP]
ECP DMA Select [3]
This field allows you to configure the parallel port DMA channel for the
selected ECP mode. This selection is available only if you select [ECP] or
[ECP+EPP] in Parallel Port Mode above. Configuration options: [1] [3]
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ASUS P4T-EM User's Manual
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