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Appendix-A 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.
Clear Math Coprocessor Busy Signal
Graphics adapter Controller
Appendix-B Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the service required. The following table shows the
IRQ used by the devices on board.
