use floppy to boot in bochs, but can use usb to boot in real environment now
do not use window now
tty can display ascii now
will print hello-world in tty now
my_sprintf success
reorder include files
add support for newline
will show usable memory map now, work fine on real machine
video work fine on real machine, change smap prosition
mem_init finished
read smapinfo in mem_init() now
show_mem() added