GredySnake_X86ReadMode 是一个不依赖操作系统，跑在x86实模式下的贪吃蛇小程序
[运行环境]
bochs
[语言]
汇编，C(c中使用了内联汇编)
[组织结构及功能]
mbr.S 主引导块代码，加载贪吃蛇程序 gredysnake_no_os.c 贪吃蛇主程序
[编译环境]
binutils
Remember: always be careful before pasting walls of text from the internet. I recommend copying line by line.
mkdir /tmp/src cd /tmp/src curl -O http://ftp.gnu.org/gnu/binutils/binutils-2.24.tar.gz # If the link 404's, look for a more recent version tar xf binutils-2.24.tar.gz mkdir binutils-build cd binutils-build ../binutils-2.24/configure --target=$TARGET --enable-interwork --enable-multilib --disable-nls --disable-werror --prefix=$PREFIX 2>&1 | tee configure.log make all install 2>&1 | tee make.log
gcc
cd /tmp/src curl -O https://ftp.gnu.org/gnu/gcc/gcc-4.9.1/gcc-4.9.1.tar.bz2 tar xf gcc-4.9.1.tar.bz2 mkdir gcc-build cd gcc-build ../gcc-4.9.1/configure --target=$TARGET --prefix="$PREFIX" --disable-nls --disable-libssp --enable-languages=c --without-headers make all-gcc make all-target-libgcc make install-gcc make install-target-libgcc
编译环境安装参考自:https://github.com/cfenollosa/os-tutorial.git
bochs
[编译]
mbr
编译：nasm -f bin -o mbr.bin mbr.S
安装：dd if=mbr.bin of=hd60.img bs=512 conv=notrunk
编译：
/usr/local/i386elfgcc/bin/i386-elf-gcc -m16 -ffreestanding -c -o gredysnake_no_os.o gredysnake_no_os.c
/usr/local/i386elfgcc/bin/i386-elf-ld -o gredysnake_no_os.bin -Ttext 0x900 --oformat binary gredysnake_no_os.o
安装：dd if=gredysnake_no_os.bin of=hd60.img bs=512 conv=notrunc seek=2
[运行]
bochs -f bochsrc.disk