AT&T 7300

From: Joe <rigdonj_at_intellistar.net>
Date: Sun Oct 29 07:33:02 2000

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
>because I worked at the hotline. I was never able to get the ethernet
>board so I resorted to Starlan. I still have 1 7300 and an RS232 NAU.
>
>My 3B1 first died in 88, the power supply went. I build a board to convert
>a PC power supply to the 3B1 power supply connector. I also added an AC
>fan to keep it cool and quiet.

   The variable speed fan used in them was quiet but very prone to failing
and causing the power supply to go into terminal melt down, I had forgotten
about that. Replacing the fan with an AC powered one was highly recommended.

>
>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.

>
>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.


   Joe
Received on Sun Oct 29 2000 - 07:33:02 GMT