Manual Number: 41209-004-1
Page 1-6
586MBH Manual
I/O Port IRQ Selection
The parallel port and both serial ports must have their IRQs. Normally, these settings can be left in
their default settings and only when conflicts arise should they be changed. Jumper JP20 is used to
select the parallel port IRQ. Jumper JP19 is used to select the first serial port's IRQ. Jumper JP18
is used to select the second serial port's IRQ. Use Table 1-8 to select the IRQs for these options.
Port
Jumper
1-2
2-3
Open
Parallel Port
JP20
IRQ 7*
IRQ 5
Disable
First Serial
Port
JP19
IRQ 4*
IRQ 5
Disable
Second Serial
Port
JP18
IRQ 3*
IRQ 9
Disable
Table 1-4: I/O Port IRQ Selection
IDE Drives Selection
The 586MBH Industrial supports up to 4 IDE drives:
2 IDE drives on the primary PCI IDE controller
2 IDE drives on the secondary PCI IDE controller
The IDE interfaces can be configured in the BIOS.
The jumpers JP2, JP7 and JP 26 allow you to choose the appropriate CPU speed,
without changing crystals and oscillators.
Clock
Frequency
JP7
50MHz
1-2
60MHz
3-4
66MHz
5-6
Table 1-5: Clock Frequency