Floppy Drive BootSector Problem

[01000101]

I put together a simple realmode bootloader, but when I try to put my kenel.bin onto the floppy drive it says "the disk in drive A is not formatted" and gives me that option to format it or not.

My bootsector ends with the standard

Code: Select all

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

Why would the floppy not let me write to it anymore? is the bootloader messing up the FAT table or am I writing to many/to few zeros to the end of the bootsector image?

[Brynet-Inc]

If you overwrite the first 512 bytes with a bootloader that isn't FAT-compatible.. It won't be recognized as FAT formatted.

This will make writing files to your disk in the "conventional" way very difficult..

http://en.wikipedia.org/wiki/File_Alloc ... oot_Sector

You can find more by searching the Forums/Wiki & Google.. Have fun

[Candy]

Why would the floppy not let me write to it anymore?

Windows won't let you read the floppy as a FAT12 floppy because it isn't. Find the FAT12 spec and look for BPB.