Specifications

I/O addresses, interrupts and DMA channels System specifications
I/O addresses, interrupts and DMA channels
Function I/O address Interrupt DMA
DMA controller #1, 8237 000H – 01FH
Interrupt controller #1, 8259 020H – 030H
Timer, 8254 040H – 050H IRQ0 DRQ0
Keyboard and mouse controller 060H – 06FH IRQ1, IRQ12
Real-time clock/NMI controller 070H – 07FH IRQ8
DMA register 080H – 09FH
Fast A20 gate and CPU reset 092H
Interrupt controller #2, 8259 0A0H – 0BFH
DMA controller #2, 8237 0C0H – 0DFH
Clear FPU 0F0H
Reset FPU 0F1H
ACC2066 register 0F2H – 0F3H
FPU 0F8H, 0FCH, 0FEH
Hard disk controller 1F0H – 1F8H IRQ14
Soundchip ESS688 220H – 22FH IRQ5 DRQ1
388H – 38BH
Parallel port LPT2 278H – 27FH IRQ5
Serial port COM2 2F8H – 2FFH IRQ3
Parallel port LPT1 378H – 37FH IRQ7
Display controller 3B0H – 3DFH
PCMCIA controller 3E0H – 3E3H
Floppy disk controller 3F0H – 3F7H IRQ6 DRQ2
Serial port COM1 3F8H – 3FFH IRQ4
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