JUN ZENG   

P.S.
(1) The display of time since boot is located in lower-right corner;
(2) The display of the last pressed glyph is located in lower-left corner.

The provided Makefile:
  1) builds a kernel
  2) copies it into rootfs/boot/kernel/kernel
  3) creates an ISO CD image with the rootfs/ contents

To boot the system in QEMU, run:
  qemu-system-x86_64 -curses -cdrom $USER.iso -drive id=disk,file=$USER.img,if=none -device ahci,id=ahci -device ide-drive,drive=disk,bus=ahci.0 -net nic -net user,hostfwd=tcp::10080-:80 -net user,hostfwd=tcp::10023-:23 --no-reboot -gdb tcp::9998

  Explanation of parameters:
  -curses         use a text console (omit this to use default SDL/VNC console)
  -cdrom x.iso    connect a CD-ROM and insert CD with x.iso disk
  --no-reboot     exit when guest reboots
  -gdb tcp::9998  listen for "remote" debugging connections on port 9998

  connect a hard drive with x.img disk:
  -drive id=disk,file=$USER.img,if=none -device ahci,id=ahci -device ide-drive,drive=disk,bus=ahci.0
  connect a NIC and forward local port 10080 into port 80 and local port 10023 to port 23
  -net nic -net user,hostfwd=tcp::10080-:80 -net user,hostfwd=tcp::10023-:23

When using the -curses mode, switch to the qemu> console with ESC-2.

To connect a remote debugger to the running qemu VM:
  gdb ./kernel
  target remote localhost:9998