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-The machine supports three kinds of interrupt: non-maskable interrupt(NMI); maskable interrupt; and system management interrupt (SMI). The maskable interrupts are generated by two Programmable Interrupt Controller(PIC)s, which are contained in T6W23A super integration chip on the system board. The SMI is generated by power supply or system control gate array in order to control power management.
-The source of I/O interrupts are listed below.
PICLevel Source of interrupt
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---SMIPower Supply or System Management (gate array)
---NMI
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0 Timer(channel 0)
1 Keyboard
2 PIC #2
#1 3 COM2 (or COM4, or PC Card)
4 COM1 (or COM3, or PC Card)
5 Reserved (or Sound, or ECP, or PC Card )
6 Floppy disk
7 Printer 1 (or Sound, or ECP(default), or PC Card)
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8 Real Time Clock
9 Software redirect to INT 0Ah (or Sound, or ECP, or PC Card)
10 Reserved (or Sound(default), CD-ROM Drive, or ECP, or PC Card)
11 Reserved (or ECP, or PC Card)
#2 12 Reserved (or PS/2 Mouse, or PC Card)
13 Math Co-processor
14 Hard disk (or ECP, or PC Card)
15 Reserved (or CD-ROM Drive(default), or ECP, or PC Card)