operating-system-in-1000-lines

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First of all, thanks for the great tutorial. This is actually not an issue, but will help, at least for myself, easier to view registers/memory info, without overlapping with the kernel output.

# run.sh: add --monitor options
$QEMU -machine virt -bios default -nographic \
    -serial mon:stdio --monitor tcp:127.0.0.1:4321,server,nowait \
    --no-reboot \
    -d unimp,guest_errors,int,cpu_reset -D qemu.log \
    -kernel kernel.elf

# open another terminal
nc localhost 4321