-* userprog should mention that keyboard over serial doesn't work
-
-* Get rid of names for synch primitives? They increase the size of
- each one by 16 bytes and are probably not that useful.
- Alternatively make the names pointers?
-
-* Write, test user programs.
- - addrspace_load() should return thread's esp.
- - thread_execute() shouldn't panic on failure (!).
-
-* Figure out PD/PT management API.
- - We should document what's in mmu.h.
- - pagedir.[ch] is undocumented.
-
-* Write, test VM.
-
-* Implement `jitter'.
-
-* Test list, hash ADTs.
-
-* Compile and install gdb, dbg versions.
- - Test gdb version.
-
-* References/bibliography.
- - Userprog refers to [SysV-i386].
-
* Write "tour".
+* Using PAL_USER.
+
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* Cygwin support: