B. I/O Port Address Map
Each peripheral device in the system is assigned a set of I/O port addresses, which
also becomes the identity of the device. The following table lists the I/O port
addresses used.
Direct memory access controller
Programmable interrupt controller
Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
System CMOS/real time clock
Direct memory access controller
Direct memory access controller
Programmable interrupt controller
Direct memory access controller
Communications Port (COM5)
Communications Port (COM4)
Communications Port (COM2)
Communications Port (COM6)
Communications Port (COM3)
Communications Port (COM1)
