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Problems booting extended floppy Images


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#1 tondo

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Posted 27 September 2009 - 12:31 AM

Hi Group,

I tried to boot an extended floppy image like described in this thread:

http://www.911cd.net...php/t10853.html

the Problem I have is the following..after memdisk startet I get the message

"Loading boot sector... booting..."

I try to boot a 5760K floppy disk.

Because I proceeded exactly like in the thread in the link I posted, I dont think that I have a problem with the geometric.

I think the problem is the bootsector. I tried different bootsectors (the built-in bootsectors of winimage), but also a bootsector of a bootable physcal floppy disc.

I hope somebody could help me

Thanks

#2 Icecube

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Posted 27 September 2009 - 07:38 AM

Try the last version of MEMDISK (download Syslinux 3.83-pre11).

Try:
LABEL fd1

LINUX memdisk

INITRD fd.img

APPEND floppy
Or if it doesn't work:
LABEL fd1

LINUX memdisk

INITRD fd.img

APPEND floppy raw


#3 tondo

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Posted 27 September 2009 - 02:32 PM

Hi Icecube. It doesnt work.

It I describe what I exactrly did.

1. I took the first floppy from the original MS-DOS 6.22 Distro and opened it in Winimage
2. I changed in winimage the parameters to the following

File System: FAT 12/16
Sectors Per Cluster: 1 (512)
Total Number of sectors: 11520
Total Image size: 5760 KB
FAT 12/16 Root Entries: 240
Media DEscriptor: 240
Sectors per track: 36
Heads: 2
Hidden SEctors: 0
Physical Drive No: 0

and saved the image as dos622.ima

3. I extracted all the files from the original DOS6.22 Disk 1 and Disk 2 and injected this files into my
dos622.ima file.

4. I used DCOPYNT with my dos6.22.ima file

5. No I had the final DOS622.IMA file.

6. I used this section in my pxelinux.cfg file:

label MS-DOS 6.22
menu label MS-DOS 6.22
kernel /images/syslinux/memdisk
append initrd=/images/dos/msdos.ima c=160 h=2 s=36 floppy

7. I tried with memdisk 3.83 and 3.83-pre11.


8. Even I tried to add "raw" and "bigraw" onto the end of the append line

9. When I boot this image (I have no errors regarding fractional end cylinders or something else) the message appears:

Disk is fd0, 5760 K, C/H/S = 160/2/36 (cmd/cmd), EDD off, rw
Using safe INT 15h access to high memory
Total size needed = 1980 bytes, allocating 2K
Old dos memory at 0x9f800 (map says 0x9fc00), loading at 0x9f000

and so on and so on

Loading bootsector....booting
Starting MS-DOS

And then nothing happens

10. When I boot only the first Floppy of MS-DOS 6.22 the installation routine starts

What can I do to get my 5760K Image booting ?

Thanks

#4 was_jaclaz

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Posted 27 September 2009 - 02:52 PM

3. I extracted all the files from the original DOS6.22 Disk 1 and Disk 2 and injected this files into my
dos622.ima file.


Oh, oh. :)

Dos 6.22 REQUIRES that FIRST file in the Filesystem is IO.SYS.

Once created the 5760 K image inject, in this order:
  • IO.SYS
  • MSDOS.SYS
  • COMMAND.COM
  • all other files

:D

jaclaz

JFYI:
http://www.boot-land...;showtopic=8102

#5 tondo

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Posted 27 September 2009 - 04:36 PM

Hi jaclaz,

I tried to do like you described, but same Problem.

Now I did the following:

1. Creating a Image exactly like I described already
2. Loading the bootsector from the original DOS Disk 1
3. Injected the files in the order you described

Same Problem:

Loading boot sector... booting...
Starting MS-DOS...

Then it hangs

#6 was_jaclaz

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Posted 27 September 2009 - 04:50 PM

try with 7.1, to exclude (or make sure) it is a memdisk problem.

jaclaz

#7 tondo

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Posted 27 September 2009 - 04:57 PM

Hi jaclaz,

I have done this already. 7.1 works but not 6.22.

#8 was_jaclaz

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Posted 28 September 2009 - 07:08 AM

Hi jaclaz,

I have done this already. 7.1 works but not 6.22.


Then it is unlkely that the problem is memdisk.
Your last option is to format the image with 7.1 bootsector BUT try adding the 6.22 files.
If the problem is in the bootsector of 6.22 this may work as a workaround.
If the problem is in the DOS 6.22 "kernel" not liking superfloppies, you are stuck. :whistling:

You can try with grub4dos mapping the floppy image to a harddisk partition. (this may resolve the hypothetical "superfloppy" problem)


jaclaz

#9 was_jaclaz

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Posted 28 September 2009 - 07:08 AM

Hi jaclaz,

I have done this already. 7.1 works but not 6.22.


Then it is unlkely that the problem is memdisk.
Your last option is to format the image with 7.1 bootsector BUT try adding the 6.22 files.
If the problem is in the bootsector of 6.22 this may work as a workaround.
If the problem is in the DOS 6.22 "kernel" not liking superfloppies, you are stuck. :whistling:

You can try with grub4dos mapping the floppy image to a harddisk partition. (this may resolve the hypothetical "superfloppy" problem)


jaclaz

#10 was_jaclaz

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Posted 28 September 2009 - 07:08 AM

Hi jaclaz,

I have done this already. 7.1 works but not 6.22.


Then it is unlkely that the problem is memdisk.
Your last option is to format the image with 7.1 bootsector BUT try adding the 6.22 files.
If the problem is in the bootsector of 6.22 this may work as a workaround.
If the problem is in the DOS 6.22 "kernel" not liking superfloppies, you are stuck. :whistling:

You can try with grub4dos mapping the floppy image to a harddisk partition. (this may resolve the hypothetical "superfloppy" problem)


jaclaz




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