@item loader.S
@itemx loader.h
The kernel loader. Assembles to 512 bytes of code and data that the
-PC BIOS loads into memory and which in turn loads the kernel into
-memory, does basic processor initialization, and jumps to the
-beginning of the kernel. @xref{Pintos Loader}, for details. You should
-not need to look at this code or modify it.
+PC BIOS loads into memory and which in turn finds the kernel on disk,
+loads it into memory, and jumps to @func{start} in @file{start.S}.
+@xref{Pintos Loader}, for details. You should not need to look at
+this code or modify it.
+
+@item start.S
+Does basic setup needed for memory protection and 32-bit
+operation on 80@var{x}86 CPUs. Unlike the loader, this code is
+actually part of the kernel. @xref{Low-Level Kernel Initialization},
+for details.
@item kernel.lds.S
The linker script used to link the kernel. Sets the load address of
-the kernel and arranges for @file{start.S} to be at the very beginning
+the kernel and arranges for @file{start.S} to be near the beginning
of the kernel image. @xref{Pintos Loader}, for details. Again, you
should not need to look at this code
or modify it, but it's here in case you're curious.
-@item start.S
-Jumps to @func{main}.
-
@item init.c
@itemx init.h
Kernel initialization, including @func{main}, the kernel's ``main
program.'' You should look over @func{main} at least to see what
gets initialized. You might want to add your own initialization code
-here. @xref{Kernel Initialization}, for details.
+here. @xref{High-Level Kernel Initialization}, for details.
@item thread.c
@itemx thread.h
so you don't need to do so yourself.
It handles serial input by passing it to the input layer (see below).
-@item disk.c
-@itemx disk.h
-Supports reading and writing sectors on up to 4 IDE disks. This won't
-actually be used until project 2.
+@item block.c
+@itemx block.h
+An abstraction layer for @dfn{block devices}, that is, random-access,
+disk-like devices that are organized as arrays of fixed-size blocks.
+Out of the box, Pintos supports two types of block devices: IDE disks
+and partitions. Block devices, regardless of type, won't actually be
+used until project 2.
+
+@item ide.c
+@itemx ide.h
+Supports reading and writing sectors on up to 4 IDE disks.
+
+@item partition.c
+@itemx partition.h
+Understands the structure of partitions on disks, allowing a single
+disk to be carved up into multiple regions (partitions) for
+independent use.
@item kbd.c
@itemx kbd.h
@xref{Testing}.
+@item Should I try running the tests with jitter?
+
+Using the jitter feature in Bochs (@pxref{Debugging versus Testing})
+is a great way to discover bugs that are timing dependent. However,
+the following tests are known to
+fail with jitter even if your code is correct: @code{alarm-priority},
+@code{alarm-simultaneous},
+@code{mlfqs-recent-1}, @code{mlfqs-fair-2}, @code{mlfqs-fair-20},
+@code{mlfqs-nice-2}, @code{mlfqs-nice-10}, and @code{priority-fifo}.
+The behavior of these tests can sometimes vary based on timing (e.g.,
+if a timer interrupt arrives at an inconvenient time).
+
@item Why do I get a test failure in @func{pass}?
@anchor{The pass function fails}
Don't worry about the possibility of timer values overflowing. Timer
values are expressed as signed 64-bit numbers, which at 100 ticks per
second should be good for almost 2,924,712,087 years. By then, we
-expect Pintos to have been phased out of the @value{coursenumber} curriculum.
+expect Pintos to have been phased out of the Computer Science curriculum.
@end table
@node Priority Scheduling FAQ