Creating image of OS to run with qemu.

[bilsch01]

I have executable code for my simple OS in a binary file (jsec2.bin) 
created using nasm assembler. I have been running it from a flash drive 
with a boot sector that loads the executable to memory and jumps to it.  
File jsec2.bin is not bootable by itself. I want to start running it 
with qemu - no flash drive involved.  I do not want qemu to use a 
virtual flash drive either. I want to use the qemu floppy image switch, 
-fda. However the -fda switch will only work if there is a aa55 boot 
sector mark at the end of the first sector of the image.

qemu-system-i386 -fda jsec2.bin will not work.  Here's some other 
possibilities:

1) I need an image of a bootable floppy with a bootsector that jumps to 
a file named jsec2.bin just like an msdos boot sector jumps to the file 
named IO.SYS contained in the file system on the disk. Is there a tool 
that I can adapt to this purpose?

2) possibly there is some way to make a grub floppy image or iso that 
boots the executable in jsec2.bin.  If there is a way using a grub tool?

Actually, both of these ideas suck because I want to use qemu for 
running the code as I develop it and these ideas are slow and 
cumbersome.  Any suggestions will be appreciated.  Thanks   Bill S.