A-4 IBM Personal Computer User GuideSystem input/output addressesThis table shows the hexadecimal addresses for each of the system board Input/Output (I/O) functions. You may want to use this information if you install an adaptercard that requires you to set I/O addresses.Table 3: System input/output addressesAddress range(hexadecimal) Function000-00F DMA controller-1020-021 Interrupt controller-1040-043 System timer060-060 Keyboard controller 8742061-061 System Speaker070-071 CMOS RAM Address and Real Time Clock081-08F DMA controller-20A0-0A1 Interrupt controller-20C0-0DF DMA controller-20F0-0FF Math Co-Processor170-177 Secondary IDE1F0-1F7 Primary IDE200-207 Game Port278-27F Parallel Printer Port 22F8-2FF Serial Asynchronous Port 2378-37F Parallel Printer Port 13F0-3F5 Floppy Disk Controller3F6-3F6 Secondary EIDE
