Well not knowing which one leaves us with two options right now so you may have to try em one at a time.
If is a samsung this is the one
http://ftp.us.dell.com/rmsd/SAMD026.EXE
And toshiba is this one
http://ftp.us.dell.com/rmsd/tosh1919.exe
Make sure to insert the formatted flopppy in your drive then execute the downloaded file to begin making the floppy.
Then insert it in the drive, upon bootup make cetrtain the bios is set to boot first from the A drive. Then after rebooting with the new floppy in the drive, the system should get to the A:. prompt. Type setup and see where you get ..