8.5 I/O Components

The Nintendo 64 I/O software subsystem consists of the following major components: system exception handler, device manager for shared device and device-dependent system interface. Figure 8-2 below shows the interaction between some of these components to service an I/O request. This interaction assumes that the device is not shared, and therefore, requires no mutual exclusion.

Figure 8-2 Interactions Between I/O Components Servicing Simple I/O Requests
[Figure 8-2]