Bootloader problem: INT13h not supported.

[TimothyARyazanov]

G'day mates,
Tim here,
I have this problem after I have finished the FAT32 bootloader, but it says that INT13h is not supported. I even made a bootloader zip file so you can correct me somewhere.
Any suggestions?
Sincerely,
Tim.

[Octocontrabass]

Code: Select all

mov ah, 0x41
mov bx, 0xAA55
int 0x13

I think the error message is coming from your MBR. Check page 29.

Code: Select all

jnc No_MBR

What happens if the BIOS sets the carry flag when it loads your VBR?

[TimothyARyazanov]

Actually, the MBR is fine. It might have to deal with the VBR.

[Octocontrabass]

Actually, the MBR is fine.

There's a difference between "it works" and "it works correctly".

It might have to deal with the VBR.

The INT 0x13 extensions are not supported on floppy disk drives. (And even if they were, you can't fit a valid FAT32 filesystem on a floppy disk.)