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From: steveq@syd.dms.CSIRO.AU (Stephen Quigg)
Newsgroups: comp.os.minix
Subject: Re: IBMPC Demo Disk
Message-ID: <1991Feb19.213539.7257@syd.dms.CSIRO.AU>
Date: 19 Feb 91 21:35:39 GMT
References: <1991Feb19.182447.6756@sbcs.sunysb.edu>
Sender: news@syd.dms.CSIRO.AU
Organization: CSIRO Maths and Stats & Applied Physics, Sydney, Australia
Lines: 49

In article <1991Feb19.182447.6756@sbcs.sunysb.edu> cgrazian@csserv2.ic.sunysb.edu (GRAZIANO) writes:
>This message was posted some time ago:
>>I recently got the 1.5 Demo disk by FTP from ftp.cs.vu.nl in /minix.
>>This file is a disk image. My question is, how can I transfer this onto a
>>standard PC floppy?
>
>I was hoping a response to this would be posted, but haven't seen one,
>so any reply must have been by mail.
>
>Could someone post this information?  Until I find out how to do this,
>the demo disk is a useless file taking up space on my disk...
>
>>Does anyone know if there is a utility available somewhere to copy a file onto
>>a DOS floppy, under DOS. Obviously it needs to copy from track 0, sector 0, i.e.
>>including the boot block.
>
>This isn't good enough to make a demo disk, is it?  It needs to be
>non-DOS, right?
>
>>It might also be a good idea if Dr. Tanenbaum was to place this info in the
>>Read_Me file with the demonstration.
>
>Has this been done?
>
>Thanx in advance for any help.
>-- 
>Christopher Graziano, Stony Brook, NY  	        /-------\ <===+
>cgrazian@ic.sunysb.edu (129.49.12.74)           | O   O |     |
>Bitnet: CGRAZIAN@SBCCVM	                        | \___/ |  The Elder
>                                                \_______/    Sign

 What I tried was the following; (were talking MSDOS here)

debug demo_dsk.ibm
-w 100,0,0,2d0
-q

( the "-" is the debug prompt.) What happens is that debug reads in the 
file, and then dumps the image in ram to drive a: ( command means "write
from memory starting at CS:100 to drive a: (0), starting at sector 0; 720
blocks (sectors) to be written").
 HOWEVER, when I tried to boot the disk (on several different machines), it
started to load (got the welcome message), but it fell over before the prompt
came up. I'm fairly sure that debug dumped the image properly, and the image
has the correct CRC, so I don't know what the problem is. I'd like to hear
from anyone else who tries the same.
Thanks,
Stephen Quigg.
steveq@natmlab.dap.csiro.oz.au