Re: Transfer Of Floppy Boot Sector To Hard Disk


<DimitrisKa@xxxxxxxxx> wrote in message
news:1139709099.415153.175080@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hello everybody,
I have a 486 machine which boots from a floppy. The floppy doesnt
contain an OS, but instead contains the program that the machine is
destined to run. (CNC cutting). (I don't have the source for the
program).

I want to make the machine boot from a hard disk, instead of the
floppy.

I have followed these steps:
1) I installed ms-dos on a hard disk and made sure that the machine can
boot from the hard disk.
2) I copied all the files from the floppy to the hard disk

Okay, that implies the floppy is FAT12. Correct?

3) From the boot sector of the floppy (FAT12), I took only the boot
code (offset 3Eh, 450bytes) and copied over the boot code of the hard
disk (FAT16).

Unfortunatelly this hasn't worked. I get "no operating system found"
when trying to boot from the hard disk. This is the message that is
hard coded in the boot code - and it is actually written in German.
Is it necessary to disassemble the boot code, or is there something
that I am missing here?

Is there a small .com file that could be German for sys.com?

If not, delete all partitions and repartition the hard disk so the first
partition is FAT12, i.e. below 16Mb in size. Then retry. If this works,
then it is probably a FAT12 versus FAT16 issue.

Rod Pemberton


.

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