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Step 3: Configuring the GP488B/MM Interface Interrupt (IRQ)
1. The factory default Interrupt (IRQ) is 7. If this creates a conflict, reset SW1 microswitches 1, 2,
and 3, and jumper JP3 according to the figure. The switch and jumper settings must both indicate
the same interrupt level for correct operation with interrupts.
2. If reset, record the new Interrupt (IRQ) being used.
The GP488B/MM Revision B interface board may be set to interrupt the PC on the occurrence of
certain hardware conditions. The level of the interrupt generated is set by JP3. The GP488B/MM
interface board adheres to the "AT-style" interrupt sharing conventions. When an interrupt occurs, the
interrupting device must be reset by writing to I/O address
to 7). This interrupt response level is set by switches 1, 2, and 3 of SW1 which must be set to
correspond to the JP3 interrupt level setting.
36
Personal488/MM (with GP488B/MM)
, where X is the interrupt level (from 0
02FX
Personal488 User's Manual For Windows95 and Windows NT
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