# The simplest possible program: just an infinite loop. # All is well if your computer clears screen and hangs without restarting. # On an emulator the window may get bigger to accomodate the higher-resolution # graphics mode. # # To convert to a disk image, first prepare a realistically sized disk image: # dd if=/dev/zero of=disk.img count=20160 # 512-byte sectors, so 10MB # Load the program on the disk image: # cat baremetal/boot.hex baremetal/ex1.hex |./bootstrap run apps/hex > a.bin # dd if=a.bin of=disk.img conv=notrunc # To run: # qemu-system-i386 disk.img # Or: # bochs -f baremetal/boot.bochsrc # boot.bochsrc loads disk.img # main: (address 0x9400) e9 fb ff ff ff # jump to main, hanging indefinitely # vim:ft=subx