Table 2-3 X-Com-2 Address Settings (Switch 3); Table 2-4 X-Com-2 Interrupt Settings (Switch 1) - Octagon Systems X-COM-2 Reference Manual

Table 2–3 X–COM–2 address settings (Switch 3)
Switch
position #
1
2
3
4
5
6
* default = 3F0
Example: Setting switch positions (1) and (3, 6) to On selects base
address 290h for COMA, and 298h for COMB.
Switch settings for interrupt
COMA and COMB share an interrupt. The user must poll the ports to
determine which one generated the interrupt.
The available interrupts are IRQ5, 6, 7, 9, 10, 11, 12, and 15. Table 2–4
shows the switch settings for selecting the interrupt. Setting a switch to On
selects the corresponding interrupt for COMA and COMB. By default the X–
COM–2 card is set for no interrupt (all switches Off).
Table 2–4 X–COM–2 interrupt settings (Switch 1)
Switch
position #
1
2
3
4
5
6
7
8
default = no interrupt
X–COM–2 address settings (Switch 3)
Lower nibble of
upper byte, bits
[1:0]
200 100
X*
X*
Interrupt
IRQ5
IRQ6
IRQ7
IRQ9
IRQ10
IRQ11
IRQ12
IRQ15
11
Upper nibble of
lower byte, bits
[7:4]
080 040 020
X*
X*
010
X*
X*