Help! My operating system won't boot from BIOS

[andrewthompson555]

Hello

I just created my operating system. It works on QEMU but when I use Rufus to put the IMG file onto a USB and boot from BIOS, it just skips it. It's got a BIOS parameter block. The code successfully compiled and I'm using Windows PE (Preinstalled Environment) or repair disc for Windows 7. Sad really.

What might be happening? It shows USB HDD in the BIOS. Many things worked before.

[heat]

Hello

I just created my operating system. It works on QEMU but when I use Rufus to put the IMG file onto a USB and boot from BIOS, it just skips it. It's got a BIOS parameter block. The code successfully compiled and I'm using Windows PE (Preinstalled Environment) or repair disc for Windows 7. Sad really.

What might be happening? It shows USB HDD in the BIOS. Many things worked before.

Are you sure you're not just using UEFI with secure boot enabled? Anyways, check your USB drive for the magic bytes at the standard offset.

[andrewthompson555]

This is an old PC. It is Acer Aspire One. There's no settings for secure boot. I tried using the F12 boot manager. It says USB FDD: SMI DISK or something like that. I press it and it ever goes to my Ubuntu (I used Windows 7 repair disc to make my OS!!! ). When I try the other one as it sometimes duplicates, it just loads and loads and loads forever.

It works on QEMU. I tried using fat_imgen which creates FAT12 bootable floppy images and WinImage but none of that works. Please help. It compiled well.