79 PCM-9563 User ManualAppendix C System AssignmentsTable C.4: System I/O PortsAddr. Range (Hex) Device00-1F Reserved20-2D Interrupt Controller2E-2F Motherboard resources30-3D Interrupt Controller40-43 Timer Register4E-4F Motherboard resources50-53 Timer/Counter60-67 NMI Register/Keyboard Controller70-7F Real-time clock, non-maskable interrupt (NMI) mask, PMC Regis-ter80-9F DMA page registerA0-BF Motherboard resourcesC0-DF ReservedF0-F1 Reserved278-278 LPT Port Alternate Port (LPT1)299-29A EC HM Index port and Data port29C-29D EC Index port and Data port2E0-2E7 Communications Port (COM5)2E8-2EF Communications Port (COM4)2F8-2FF Communications Port (COM2)378-378 LPT Port (LPT1)3BC-3BC LPT Port Alternate Port (LPT1)3C0-3DF Motherboard resources3E0-3E7 Communications Port (COM6)3E8-3EF Communications Port (COM3)3F8-3FF Communications Port (COM1)4D0-4D1 Motherboard resources