mboot

mboot is a minimal os for i386 platforms.

Prequisites

Building mboot depends on:

• llvm tools (clang, ld.lld)
• nasm

Running mboot needs:

• the building tools or a disk image
• qemu-system-x86_64

Building

Note: inside the makefile there is a line appending a macro definition to CFLAGS. Edit the macro's value to bundle different demos to run on boot

make
# normal os
qemu-system-x86_64 -m 4G -drive file=image.img -serial stdio

# with networking enabled
qemu-system-x86_64 -m 4G -drive file=image.img -serial stdio -device e1000,netdev=n0 -netdev user,id=n0 -object filter-dump,id=f1,netdev=n0,file=netdump.pcap

Demo options

Demo options include:

• CUBE_DEMO
• TIME_DEMO
• E1K_DEMO
• IMF_DEMO
• PSF_DEMO

Note

As filesystems and elf files aren't implemented yet, programs you want to launch from mboot need to be linked into it and called from loader.c

todo:

• 32 bit protected mode
• cpu exceptions
• individual hardware interrupts
• a ps/2 keyboard
• vga in 320x200x8bpp
• reading ata drives
• rs232 interfaces
• the intel 8259 PIC
• the intel 8253 PIT
• the mbr partitioning scheme
• wad files as the filesystem
• enable x87 fpu
• memory allocator
• elf loader
• paging
• libc

Screenshots