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From: donm@pnet07.cts.com (Don Maslin)
Newsgroups: comp.os.cpm
Subject: Re: Help needed: Compupro 8/16 running concurrent cp/m
Message-ID: <1991Jun13.214502.9446@baron.uucp>
Date: 13 Jun 91 21:45:02 GMT
Article-I.D.: baron.1991Jun13.214502.9446
Sender: pnet@baron.uucp (People-NET)
Organization: People-Net [pnet07], San Diego, CA
Lines: 22

kevin@watnxt3.ucr.edu (Kevin Lund) writes:
>So, here's the core of the problem:  my format program will not (as far as I
>can tell) re-format a single sided disk as a double sided.  I've tried taking
>my most vicious magnets to SS disks but to no avail!  It's like the
>computer KNOWS! Any ideas?  Also, anybody know where I can get reasonably-
>priced 8" blanks?
>
Yes, it *does* know!  If you will compare the double sided disks with the
single sided ones you will see that the sector 0 hole in the jacket for the
double sided one is at about 1 o'clock, whereas, the single sided one is at
about 12:30.  Make a paper template of the DS hole location and mark it on the
SS jacket - don't forget the back side too -  and with an old fashioned hand
paper punch a new hole in one side of the jacket.  Turn it over and do the
second.  Voila! a double sided disk.  NOTE!!!! Be very careful that you don't
scratch, fold, spindle, or mutilate the disk itself, AND that you DO NOT punch
a new hole in that also.  Just in the jacket, please.  Back before double
sided drives were at all common, they used to make 'flippy's' by a variation
of that technique, so that both sides were accessible.

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