xv6 runs the console on the serial port, not the parallel port
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			@ -143,7 +143,7 @@ GDBPORT = $(shell expr `id -u` % 5000 + 25000)
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QEMUOPTS = -smp 2 -hdb fs.img xv6.img
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qemu: fs.img xv6.img
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	qemu -parallel mon:stdio $(QEMUOPTS)
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	qemu -serial mon:stdio $(QEMUOPTS)
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qemutty: fs.img xv6.img
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	qemu -nographic $(QEMUOPTS)
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			@ -153,7 +153,7 @@ qemutty: fs.img xv6.img
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qemu-gdb: fs.img xv6.img .gdbinit
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	@echo "*** Now run 'gdb'." 1>&2
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	qemu -parallel mon:stdio $(QEMUOPTS) -s -S -p $(GDBPORT)
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	qemu -serial mon:stdio $(QEMUOPTS) -s -S -p $(GDBPORT)
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# CUT HERE
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# prepare dist for students
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