(no subject) - test-drb@ccmp.vtda.org

29 Dec 2002

...
 Message: 3
Date: Fri, 27 Dec 2002 20:46:01 -0600
Subject: DEC 3000 300X/300
From: Bradley Slavik &lt;fire(a)dls.net&gt;
To: &lt;cctalk(a)classiccmp.org&gt;
Reply-To: cctech(a)classiccmp.org

I finally am almost within reach of getting my DEC 3000 300 working. A few
years ago I foolishly purchased it without memory, thinking it would be a
simple matter to inexpensively pick up some memory later. How wrong I was.
Now I have purchased a DEC 3000 300X with 160MB memory with the intention of
lending 32MB to the 300. 

My 300LX uses 8 or 32 mb 72 pin FPM-DIMM's (with Parity, that's important!). 
Did not try 16 or 64 mb modules, anyone else?

...
 Now I look at the back of the machine and my main
question is what cable do I need to hook up my VT220, or my VT420, or what
model monitor with keyboard and mouse is this thing supposed to work with?

In a typical DEC fashion, in the manual they do not mention model numbers of
monitor to go with it, but there are rough instructions that I may be able
to follow to get dumb terminal console working. I would ideally like to have
real monitor on 300X,  
Read the manual at page 1-3 for supported monitors.

I think you are aware of Keyboard-mouse Cable 17-02640-01 and the DEC-protocol
of the mouse. Otherwise see: 
http://www.netclique.net/oldmouse/Hawley/DEC-VAX.html or
http://www.cs.utk.edu/~shuford/terminal/dec_mouse_news.txt
http://groups.google.com/groups?q=author:mzthompson%40aol.com&hl=de&…
=lang_en&ie=UTF-8&selm=20021016091543.01470.00001267%40mb-mb.aol.com&rnum=4
(on
one line).

...

VT420 on 300, leaving my VT220 free for my MicroVax II.

Any ascii-terminal will work, use 9600 baud setting. I just tried to connect a
VT220 to my 300LX to the 25 pole D-connector (plug 4 on page 3-6) and was
successful with a BC22A-25 cable. (Dont forget to detach the keyboard from
300LX!) It takes about 1-2 minutes before the first text appears to the serial
terminal. Output comes just after the 3-tone melody. Build-in CRT-output comes
much faster. 

I have a VR297-DA, and tried to connect it to the 300LX to no success. (There
is some picture and synchronisation, but the information appears 5 times
adjacent, and is not readable.) Either this monitor does not match the 300LX or
the video-setup of the internal adapter has the wrong parameters. Anyone some
clues about this? To what workstation will the VR297-DA fit?

I hope this helps you.

Frank Arnold