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ZipOS directory. This file contains two kernel entry points, {\tt kntasks()},
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ZipOS directory. This file contains two kernel entry points, {\tt kntasks()},
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which returns the number of tasks the kernel needs to know about, and
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which returns the number of tasks the kernel needs to know about, and
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{\tt kinit()}, which builds each of the tasks and connects their file
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{\tt kinit()}, which builds each of the tasks and connects their file
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descriptors to the various devices they will be referencing.
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descriptors to the various devices they will be referencing.
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\subsection{Traps}
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\subsection{Traps}
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The ZipCPU supports a variety of traps, listed here:
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The ZipOS supports a variety of traps, listed here:
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\begin{itemize}
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\begin{itemize}
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\item WAIT: Halts the execution of a process until an event takes place, or
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\item WAIT: Halts the execution of a process until an event takes place, or
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a timeout has been reached. The events that can take place are a
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a timeout has been reached. The events that can take place are a
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bitmask of the various interrupts the CPU supports, together with a
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bitmask of the various interrupts the CPU supports, together with a
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bitmask of the values found in {\tt swint.h}.
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bitmask of the values found in {\tt swint.h}.
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