From: dnichols@d-and-d.com (DoN. Nichols)
Subject: Re: Help needed to bring life back to my old UNIX PC
Organization: D and D Data, Vienna VA
Date: Wed, 27 Jan 1993 04:31:24 GMT

In article <1k1g1gINNh59@kirov.intercon.no> aras@intercon.no (Arne Asplem) writes:
>
>Before I go any further with bringing life back to my old AT&T UNIX
>PC 7300, I would like to check that I have all the required floppy
>diskettes.
>
>From the system manual box I have the following diskettes,
>all are labelled "System Software, Version 3.51":
>
>  Floppy Boot Disk (2/12)
>  Floppy File System Disk (3/12)
>  Hard Disk Boot (4/12)4/12)4/12)4/12)
>  Foundation Set (5-12/12)
>  Telephone Manager (1/1)
>  Async. Terminal Emulation Disk (1/1)

*** Hold on to this one - we couldn't send you a replacement, given the
	current laws. ***

>  Encryption Set (1-2/2)
   *****

>  Communication Patch (1/1)
>
>Apparently I'm missing the first diskette in the Foundation Set,
>the onle labelled 1/12. Do I need this ?

	Absolutely.  It is the diagnostic disk, which is needed to format
the hard disk for the 3B1/7300.

	It also looks as though you are missing the terminfo disks and the
gss drivers from the full foundation set.  The terminfo ones are needed if
you are going to be logging in with other terminals on the machine.  I think
that the gss drivers are needed for certain graphics programs, but I haven't
checked recently.

	What you *don't* have, and will want greatly, is the development
set.  That is more disks than the whole foundation set.

>Furthermore, since I've never installed UNIX on a 3B1 before
>(I traded i for a 2400 bps modem some time ago, and only used for
>a couple of weeks before the hardisk crashed), do I need a serial no.
>(well, I guess I have that on the original diskettes) or a installation
>key ?

	No, you just format with the diagnostic disk, and then put in the
floppy boot disk, and it will offer to install the OS, warning you that it
will erase all of the nothing that you have on the disk.  It then tells you
everything that you need to do as you install things.  (It will give a
moment's confusion when it starts off with disk 5 of the foundation set, and
afterwards it asks for disk 2, 3, ...)  This is because cpio (which is now
in control) is asking for the floppys starting with 5 as 1, so all the
subsequent disks are labeled wrong for the prompts.

	One other thing to remember is to not install the encryption disk
(the one that we can't send you :-) *after* installing everything else.  The
reason for this is that it checks whether certain programs are present, and
*only* if they are, it replaces them with the encryption-capable versions.

>Is there a FTP archive with a FAQ for this group somewhere on the net ?

	There is an excellent archive of software source and hardware hints
both on ftp.uu.net and (I think) archive.osu.cis.  I am not sure whether the
FAQ is posted there.  It hasn't been updated recently, and there is a new
flurry of activity, including selecting a new maintainer, so it may be
posted soon.

>I'm particularly interested in replacing the floppy disk (it's a 360K 
>isn't it ?) with a 3 1/2" 1.44 Meg, is this possible ?

	Well ... yes and no.  You can put in a 1.44 MB drive (from one
specific manufacturer, and one specific model), but it has to be jumpered to
hold it down to 720k.  The disk controller in the 3B1 is not wired to
produce the proper data rate for the 1.44 MB format.  (I have considered
trying to change this, but haven't had the time to devote to the project.)

	It is possible to put in other 720 K floppy drives, but there are
difficulties involved.  The other drives have a status line which reports
the oposite sense of what the system is expecting.  In one case, it is
reporting "disk ready", while the 3B1/7300 is looking for a "disk changed"
line.  As a result, you are flooded with windows popping up saying something
along the lines of "Disk removed - Please re-insert the floppy and close the
door", even though you haven't touched the disk.  (I know, I put such a
drive on my system.  The "One True Drive", has a larger set of configuration
jumpers, and can be set to tell the 3B1 what it wants to know.

	The article describing this was posted by Tom Trebisky (I'm sure
that the spelling of his name is wrong), and should be in the archives.

	Good Luck
		DoN.
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