I/O Address Map
Hex Range | Devices |
|
|
DMA | |
Interrupt | |
System Timer | |
Keyboard Controller 8742 | |
System Speaker | |
CMOS RAM Address and Real Time Clock | |
DMA Page Register | |
Interrupt | |
DMA | |
Math | |
Secondary IDE | |
Primary IDE | |
Parallel Printer Port 2 | |
Serial Asynchronous Port 2 | |
Parallel Printer Port 1 | |
Floppy Disk Controller | |
Secondary IDE | |
Primary IDE | |
Serial Asynchronous Port 1 | |
0CF8 | Configuration Address Register |
0CFC | Configuration Data Register |
Parallel Printer Port 1 | |
|
|
IRQ Assignment Map
IRQx | System Devices |
|
|
|
|
IRQ0 | Timer | N |
|
|
|
IRQ1 | Keyboard | N |
|
|
|
IRQ2 | Cascade Interrupt Control | N |
|
|
|
IRQ3 | Serial Alternate | Reserved |
|
|
|
IRQ4 | Serial Primary | Reserved |
|
|
|
IRQ5 | Reserved | |
|
|
|
IRQ6 | Floppy Disk | Reserved |
|
|
|
IRQ7 | Parallel Port | Reserved |
|
|
|
IRQ8 | Real Time Clock | N |
|
|
|
IRQ9 | N | Reserved |
|
|
|
IRQ10 | N | Reserved |
|
|
|
IRQ11 | N | Reserved |
|
|
|
IRQ12 | PS/2 Mouse | Reserved |
|
|
|
IRQ13 | Math Coprocessor Exception | N |
|
|
|
IRQ14 | Primary IDE | Reserved |
|
|
|
IRQ15 | Secondary IDE | Reserved |
|
|
|
NOTE: N - Not be used
18 | Chapter 1 |