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DS2 Switch Settings—Interrupt Request
Level
The Dual In-line Package (DIP) switch designated DS2, SW8 through SW1
select the IRQ level to be used by the IPC-1600 to interrupt the host
processor. Only one of the eight switches is set to ON; the other seven
switches must be set to OFF. At the factory, the hardware Interrupt ReQuest
(IRQ) level is set to IRQ10.
One IRQ line can be assigned for each IPC-1600 or shared among all
equipped IPC-1600s out of a total possible eight interrupts (IRQ3 through
IRQ5, IRQ7, IRQ10 through IRQ12, and IRQ15). The IRQ7 interrupt request
level is NOT recommended for use with the AT&T 6386 WGS computers.
Figure A-4 shows DS2 in the factory set position (IRQ10).
CIRCUIT BOARD
ON
8 7 6 5 4 3 2 1
OFF
- Switch pushed “IN” or to the
indicated position.
ON = 0 = Closed
OFF = 1 = Open
Figure A-4: DS2 Interrupt Request Level (Default Setting)
A-10 IPC-1600 USER’S GUIDE