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 Post subject: MSDOS can't find command.com
PostPosted: Tue Aug 31, 2010 1:44 pm 
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Joined: Tue Aug 31, 2010 1:18 pm
Posts: 1
Like many folks, I have half a dozen boot floppies for various support activities. I thought the easy option was to insert them in the UBCD Custom folder and edit the custom.cfg. How wrong I was.

All the floppies use MSDOS 6.22, because I like it and I've got the ligitimate license and install disks. Booting from UBCD and choosing my MSDOS menu item, I keep getting "error in config.sys, unable to find command processor e.g. c:\ command.com". I've tried varying the first line of the config.sys, but the failure is always the against the first line. I've even tried making the first config.sys line into "shell=a:\command.com /p" and also made sure all the MSDOS files are in the root of the floppy image with no sub-folders.

Have I missed something crucial or does MSDOS just not work with UBCD 5? For your information, I have successfully inserted a couple of boot floppies from Terrabyte Unlimited (BootITng and ImageforDOS) which use Terrabyte's own custom OS, so any help with MSDOS would be appreciated.


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 Post subject: Re: MSDOS can't find command.com
PostPosted: Tue Aug 31, 2010 10:26 pm 
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Joined: Tue Sep 09, 2008 4:37 pm
Posts: 462
Location: California, USA
Have you tried chain.c32 booting?

http://syslinux.zytor.com/wiki/index.ph ... /chain.c32


Icecube will be more familiar with this than I.

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Visit the UBCD Wiki: http://wiki.ultimatebootcd.com
Please check your UBCD ISO MD5 Hash Sum; May prevent issues later on by not having an exact copy.

Currently Working on Common Issues and Repair Tips on the Wiki.


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 Post subject: Re: MSDOS can't find command.com
PostPosted: Sat Sep 04, 2010 3:06 am 
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Joined: Fri Jan 11, 2008 2:52 pm
Posts: 1278
If you have the actual floppy images, make a floppy image file of them.
Save them for example in /ubcd/images/.

Then you can boot those tools with MEMDISK:
Code:
LABEL dos_1
MENU LABEL Some DOS tool
LINUX /boot/syslinux/memdisk
INITRD /ubcd/images/dos_1.img
APPEND raw

You can also compress the images with 7-zip (save as gzip):
Code:
LABEL dos_1
MENU LABEL Some DOS tool
LINUX /boot/syslinux/memdisk
INITRD /ubcd/images/dos_1.img.gz
APPEND raw

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