Unable to run qemu on Ubuntu, even for a simple guest

Question

I have simple task - RUN THIS CODE "boothi.asm": ``` use16 org 0x7C00 xor ax, ax mov es, ax mov ds, ax mov ss, ax mov sp, 0x1000 mov ax, 3 int 10h mov si, mHello call print die: jmp short die mHello db 'Hello, world - i was booted!',10,13,0 print: cld pusha .PrintChar: lodsb test al, al jz short .Exit mov ah, 0eh mov bl, 7 int 10h jmp short .PrintChar .Exit: popa ret ``` I have compile it with: ``` nasm -f bin boothi.asm -o boothi.bin ``` But i don't understand - HOW can i run it on virtual machine to test. I try to crate floppy disk image and run it with qemu like this: ``` dd if=/dev/zero of=disk.img bs=1024 count=1440 dd if=boothi.bin of=disk.img conv=notrunc ``` But on the next step - ``` qemu -fda disk.img -boot a ``` I have strange trouble- ``` Could not access KVM kernel module: No such file or directory failed to initialize KVM: No such file or directory ``` I try to install qemu and kvm. But this error are in. But qemu try to run this code and check all devices - hard\cdrom\f…

Accepted Answer

Looking at your assembler, you need to add a boot signature to the end of the boot sector - 0xaa55 - see http://www.nondot.org/sabre/os/files/Booting/nasmBoot.txt

I added the following two lines and your example then worked:

```
times 510-($-$$) db 0   ; Fill the file with 0's
dw 0AA55h               ; End the file with AA55
```

Unable to run qemu on Ubuntu, even for a simple guest

Solution

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