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IAR Aug 2000
It is usually best to configure low-level settings, such as the bus and interrupt controller,
first as these may affect global resources (in particular the number of available port
pins). 
Figure 2: System setup of the bus controller
Figure 2 shows system configuration of the bus controller. External interfacing pins (chip
select 2) have been enabled, like some other features (for instance memory expansion
mode). Other option pages can be used to configure control pins, clocking, and the
watchdog timer.
Figure 3: Configuration of the interrupt controller
Figure 3 shows the dialog box for configuring the interrupt controller. INT1 and INT2
have been enabled with Both edges and Rising edge triggering, respectively. For this
configuration, the code generator will create an interrupt controller initialization function,
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