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User’s Manual
ATX Main board
69
z Onboard FDC Controller
When enabled, this field allows you to connect your floppy disk drives to the onboard floppy
disk drive connector instead of a separate controller card. If you want to use a different
controller card to connect the floppy disk drives, set this field to Disabled.
z Onboard Serial Port 1
The settings are “3F8/IRQ4”, “2F8/IRQ3”, “3E8/IRQ4”, “2E8/IRQ3”, and “Disabled” for the
on-board serial connector.
z Onboard Parallel Port
This field sets the address of the on-board parallel port connector. You can select
“378/IRQ7”, “278/IRQ5”, “3BC/IRQ7”, or “Disabled”. If you install an I/O card with a parallel
port, make sure there is no conflict in the address assignments. The single board computer
can support up to three parallel ports.
z Parallel Port Mode
This field allows you to set the operation mode of the parallel port. The setting “Normal”
allows normal speed operation, but in one direction only. “EPP” allows bidirectional parallel
port operation at maximum speed. “ECP” allows the parallel port to operate in bidirectional
mode and at a speed faster than the maximum data transfer rate. “ECP + EPP” allows
normal speed operation in a two-way mode.
z EPP Mode Select
This field allows you to select EPP port type 1.7 or 1.9. The choices are “EPP1.9” and
“EPP1.7”.
z ECP Mode Use DMA
This selection is available only if you select “ECP” or “ECP + EPP” in the Parallel Port Mode
field. In ECP Mode, you can select DMA channel 1 or DMA channel 3. Leave this field on
the default setting.
2.2.4.3 Watch Dog Timer Select
This option will determine watch dog timer. The choices: Disabled, 10, 20, 30, 40 Sec. 1, 2,
4 Min.