import
xx
more or less take traps/interrupts
foo
fix some trap bugs
primitive fork and exit system calls
sleep, wakeup, wait, exit
checkpoint
start on MP; detect MP configuration
checkpoint. booting second processor.  stack is messed up, but thanks to cliff
and plan 9 code, at least boots and gets into C code.
oops
send console output to parallel port
compile "user programs"
curproc array
bug in trapret
boot more than two CPUs, each on own initial stack
system call arguments
stick mpstack in cpu structure
system call return values
initialize 2nd cpu's idt
file descriptors
pipes
timer interrupts