Grub boot to CD
 

Just want to know how to edit the grub file to boot to a CD... tried

title CD
root (cd0)

I was just fooling around and it didn't work :( The real command would be useful

title CD
rootnoverify (cdrom,0)

if not try "/dev/cdrom"
I'm just guessing... i'm not at my pc right now...

AFAIK grub does support booting a CD natively, but if someone knows how to do it please let me know.
In the meantime try this, download this bootsector file and put it in your /boot
http://ryantsai.ozforces.com.au/bootflop.bin
and add in grub.conf/menu.lst:
what this file does is that it'll first try booting from the floppy, if one isnt present then it'll try to boot from the cdrom, a bit of a nuisance but hey it works.

Does anyone have a hack of this bootsector that will just jump to the booting from CD instead of testing the floppy first?

CMOS Option
 

You should be able to modify the boot order in the CMOS, just change the first boot device to CDROM, it is commonly set to floppy.

Well, the point is not to boot the system to the CDROM. That I know how to do.

What I have is a floppy disk that I need to leave in the drive and have it bypass it to the CDROM unless another option is being selected. I am using grub on a FAT12 floppy disk. I have a Freedos boot sector for when I want to boot to the floppy. I want to use this bootsector (minus the floppy check) as the default option.

This way I can boot to the floppy if I select it, otherwise it will resume booting to the other devices.

Unfortunately I know very little about x86 assembly code otherwise I would have done it by now.