AT&T 7300

From: Joe <rigdonj_at_intellistar.net>
Date: Sun Oct 29 09:30:08 2000

At 08:23 AM 10/29/00 -0500, Neil wrote:
>Joe wrote:
>>
>> At 11:58 PM 10/28/00 -0400, Neil wrote:
>> >The 7300/3B1 was capable of running SYSV R3.1, I had a 3B1 with 3.2
>
>> >I seemed to recal being able to reset all the passwords via the menu
>> >system so as long as you could get in you could reset all the passwords.
>>
>> Correct, I seem to remember that TUTOR, ADMIN and INSTALL would get you
>> into any machine that hadn't had the OS fixed. One of mine has the OS
>> fixed and I still haven't figured out how to get into it but I haven't
>> tried very hard either since I have two with the "broken" OS.
>
>You could also boot a systems disk and mount / . Once it was mounted you
would
>use vi to edit the /etc/passwd file.

   Yes, IF you have a systems disk! I didn't get any docs or disks till I
had collected four or five of the machines even then the first systems disk
that I got was corrupted and wouldn't boot. I don't know if I ever got a
working systems disk.


>
>> >Oh, I also still have the 8 head mods to the hard drive system. You would
>> >swap in a 2010 for the WD1010 and solder on this mod to get the extra
head.
>>
>> Replacing the WD1010 with a 2010 allowed you to use a hard drive with 8
>> heads and a resulting larger capacity. I think there were also some mods to
>> increase the data transfer rate too. WD2010s are widely available on
>> surplus/scrap disk drive controllers. This mod and many others used to be
>> posted on the net. I think I have them all archived, let me know if you
>> have trouble finding them and I'll E-mail them to you.
>
>As some else pointed out, the WD2010 got you the extra cylinders (2048)
>the other mod (a pal, which I have) got you the extra head bit.

   OK I knew it was something like that. The point is that there a number
of mods that you can do to them to add bigger and more drives, more
reliaable fans, etc. There is (or was) a lot of mods and info about them
scattered around the net. I still check the AT&T news-groups but they're
pretty much dead now.

  Do you have the logic equations for the PAL? I don't think I have them
but I recently got a PAL programmer so I could roll my own if I had the
equations.


>
>BTW: I also archived various messages


>(dead tree format),

   That's an interesting term. I've never heard that before.

> I also have the
>hardware manual.

   I'd like to get a copy of that. Someone was supposed to be putting it on
CD-disk several years ago and I bought a copy but never got it. I have a
number of other manuals for the 7300 and I think I may have the
developement software. I need to go through the stuff and make a list of
what I have.

   Joe
Received on Sun Oct 29 2000 - 09:30:08 GMT