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Memory and I/O Map I/O MAP The following table lists the common I/O devices in the EPM-CPU-3 I/O map. User I/O devices should be added in the 104h – 3FFh range, using care to avoid the devices already in the map as shown below. Table 10: On-Board I/O Devices Note: I/O Device Standard I/O Addresses See ÉlanSC520 register set manual Special Control Register Revision Indicator Register Map and Paging Control Register Primary IDE Controller COM 4 Serial Port COM 2 Serial Port COM 3 Serial Port Floppy Disk Controller COM1 Serial Port CBAR 000h-0FFh 0E0h 0E1h 0E3h 1F0h – 1F6h 2E8h – 2EFh 2F8h – 2FFh 3E8h – 3EFh 3F0h – 3F7h 3F8h – 3FFh FFFCh I/O ports occupied by on-board devices are freed up when the device is disabled in CMOS Setup. EPM-CPU-3 Reference Manual Reference – 35
