[sebhc] Re-creating actual floppies from archive

Dwight Elvey dwight.elvey at amd.com
Tue Mar 14 16:24:50 CST 2006

Hi Joe
 If the it is an ascii text file that
you are trying to recover, you can write a simple
program, in the language of your choice, to reorder
the sectors. Once you know the order, extracting
the file should be relatively easy. I'm assuming
it is a text file that you are trying to look at.
 You just need to know the sector size and the number
of sectors per track. Buffer a track at a time,
un-scramble the sectors and write the buffer to
a file. Once you locate the file you want, just
read it out.
 I dn't know of any specifc utility for this. You
should write your own. If it is good, put it on
the site.

>From: "Joe Smith" <bandit1921 at cox.net>
>Even if I could write it out to a 1.44 disk would be good, that is 
>what I need to know, what utility does that?
>At 02:07 PM 3/14/2006 -0800, you wrote:
>>  Most early CP/M used interleaving of the sectors.
>>Once it is un-zipped, it is still just a raw image.
>>If you wanted to look at specific files, you'd need
>>to figure the inteleaving.
>> >From: "Joe Smith" <bandit1921 at cox.net>
>> >
>> >It is in the archive under cpm software
>> >At 03:25 PM 3/14/2006 -0500, you wrote:
>> >> > Wasn't talking about zip files Dave,the little file that is
>> >> inside of the zip.
>> >> > Example:PIE 1.5b  Distribution Disk, that is what is in the PIE.zip,
>> >> > how does one read that file into something understandable?
>> >> > Kind of like uuencode/decode..
>> >>
>> >>I don't recognize "PIE" - is this somthing you downloaded from my
>> >>site? If so, it's something that I've forgotten about (and not something
>> >>I created) - give me a reminder as to where (exactly) is is?
>> >>
>> >>Dave
>> >>
>> >>--
>> >>dave06a (at)    Dave Dunfield
>> >>dunfield (dot)  Firmware development services & tools: www.dunfield.com
>> >>com             Collector of vintage computing equipment:
>> >>                 http://www.parse.com/~ddunfield/museum/index.html
>> >>
>> >>--
>> >>Delivered by the SEBHC Mailing List
>> >
>> >Joe Smith
>> >joebandit
>> >jtsdadinaz
>> >Conbuilder debugger /Programmer
>> >
>> >--
>> >Delivered by the SEBHC Mailing List
>>Delivered by the SEBHC Mailing List
>Joe Smith
>Conbuilder debugger /Programmer
>Delivered by the SEBHC Mailing List

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