User`s manual

486-OCV Plus
Appendix F u F-2
Page Memory Address
I/O Port Address Page Memory
0081H DMA Channel 2
0082H DMA Channel 3
0083H DMA Channel 1
0087H DMA Channel 0
0089H DMA Channel 6
008AH DMA Channel 7
008BH DMA Channel 5
System Interrupts
NMI Parity or I/O Channel Check
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 Interrupt Controller 2
IRQ0-Timer Output 0 (Out 0) IRQ8-Realtime Clock INT
IRQ1-Keyboard (Output Buffer Full) IRQ9-Software Redirected
to INT 0AH (IRQ2)
IRQ2-Interrupt from INTR2 IRQ10-Reserved
IRQ3-Serial Port 2 IRQ11-Reserved
IRQ4-Serial Port 1 IRQ12-PS/2 Mouse
IRQ5-Parallel Port 2 IRQ13-Coprocessor
IRQ6-Diskette Controller IRQ14-Fixed Disk Controller
IRQ7-Parallel Port 1 IRQ15-Reserved