Running bootloader in qemu

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Running bootloader in qemu

Postby utsav_popli » Tue May 27, 2014 10:14 am

I have very simple bootloader which i am trying to run through qemu in linux.

But qemu gets idle and show "booting from floppy"

I dont know how to make it work! I have included bootloader code and makefile script.

Here is the code for the bootloader


org 0
bits 16
jmp boot1

bootmsg db "Preparing to Load Operating System", 0x0a,0x0d,0x0
print:
or al,al
jz .printdone
lodsb
mov ah,0x0e
int 0x10
jmp print


.printdone:
ret



boot1:
cli
mov ax,0x07c0

mov ds,ax
mov es,ax
mov ax,0x0000
mov ss,ax
mov sp,0x07c0
sti

mov si,bootmsg
call print
hlt

times 510-($-$$) db 0
dw 0xAA55



and here is my Makefile script

boot.bin: boot.asm
nasm -f bin boot.asm -o boot.bin

boot.img: boot.bin
dd if=/dev/null of=boot.img count=1 bs=512
dd if=boot.bin of=boot.img conv=notrunc

qemu: boot.img
qemu -fda boot.img
clean:
rm *.bin *.img
utsav_popli
 
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Joined: Sat Nov 28, 2009 7:39 am
Location: San Jose, CA

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