•
CONNECTOR
PORT
JUMPER
GROUP
J1
J2
J3
RS232C serial port COMA
Optional serial port COMB
Parallel port
W4
W5
W6
PAIR
SHORTED
1/2
3/4
5/6
7/8
9/10
11/12
13/14
INTERRUPT
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6 _ I R Q 7
Pull Down
•
•
956 Manual
August 1994
Implement your interrupt selections by configuring the appropriate jumper group, according to
Table 3-9.
Table 3-9. Interrupt Jumper Groups
Within a given jumper group, shorting a particular jumper pin pair assigns a corresponding interrupt,
as shown in Table 3-10.
Table 3-10. Interrupt Selection Jumper Pins
You are not required to assign an interrupt to a port, however, you will assign interrupts to ports that
have incoming data. T h e parallel port does not usually need to have an interrupt if it is used solely as
an output port, such as a printer port. To assign an interrupt to a port, short the corresponding pins on
the jumper group for that port. B e sure to short pins 13/14 which will connect a pull-down resistor to
the interrupt line.
If COM1 (Port 3F8) or COM2 (Port 2F8) is selected for use on the XVME-956/400, check the BIOS
set-up menu on the XVME PC/AT. Type < C T R L > < A LT > S to get into set-up. Then disable the
internal COM port by setting it to off.
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