37Appendix B. I/O Address Map• I/O Address MapI/O AddressMapDescription000-01F DMA Controller #1020-021 Interrupt Controller # 1, Master040-05F System Timer060-06F Standard 101/102 keyboard Controller070-07F Real time Clock, NMI Controller080-0BF DMA Page Register0A0-0BF Interrupt Controller # 20C0-0DF DMA Controller # 20F0-0F0 Clear Math Coprocessor Busy0F1-0F1 Reset Math Coprocessor0F8-OFF Math Coprocessor170-1F7 BUS Master PCI IDE Controller278-27F Parallel Printer Port 22F8-2FF Serial Port 2294-297 PCI bus376-376 BUS Master PCI IDE Controller378-37F Parallel Printer Port 13B0-3DF Standard AGP Graphic Adapter3F0-3F7 Floppy Disk Controller3F8-3FF Serial Port 1443 Watch dog timer enable843/043 Watch dog timer disable381 st MB Memory Address MapMemory address Description00000-9FFFF SYSTEM MEMORYA0000-BFFFF VGA BUFFERC0000-C7FFF VGA BIOSC8000-CFFFF NO USED6000-D7FFF DEFAULT DOC2000 ADDRESSE0000-FFFFF SYSTEM BIOS100000 EXTEND MEMORYIRQ Mapping ChartIRQ0 System Timer IRQ8 RTC clockIRQ1 Keyboard IRQ9 SCSI PORT AIRQ2 IRQ Controller IRQ10 LANIRQ3 COM2 IRQ11 IDE RAIDIRQ4 COM1 IRQ12 PS/2 mouseIRQ5 LAN IRQ13 FPUIRQ6 FDC IRQ14 Primary IDEIRQ7 Printer IRQ15 Secondary IDEDMA Channel AssignmentChannel Function0 Available1 Available2 Floppy disk3 Available4 Cascade for DMA controller 15 Available6 Available7 Available