System Interrupts - DFI 486-OCV Plus User Manual

Page Memory Address
I/O Port Address
0081H
0082H
0083H
0087H
0089H
008AH
008BH

System Interrupts

NMI
Note:
The non-maskable interrupt (NMI) of the 486-OCV Plus
is used to report memory parity errors. The memory
parity is derived from the system board memory and I/O
adapter optional memory.
Interrupt Controller 1
IRQ0-Timer Output 0 (Out 0)
IRQ1-Keyboard (Output Buffer Full)
IRQ2-Interrupt from INTR2
IRQ3-Serial Port 2
IRQ4-Serial Port 1
IRQ5-Parallel Port 2
IRQ6-Diskette Controller
IRQ7-Parallel Port 1
Page Memory
DMA Channel 2
DMA Channel 3
DMA Channel 1
DMA Channel 0
DMA Channel 6
DMA Channel 7
DMA Channel 5
Parity or I/O Channel Check
Interrupt Controller 2
IRQ8-Realtime Clock INT
IRQ9-Software Redirected
to INT 0AH (IRQ2)
IRQ10-Reserved
IRQ11-Reserved
IRQ12-PS/2 Mouse
IRQ13-Coprocessor
IRQ14-Fixed Disk Controller
IRQ15-Reserved
486-OCV Plus
Appendix F u F-2