Heathkit ET-3400 - test-drb@ccmp.vtda.org

28 Jun 1998

At 04:06 AM 6/28/98 -0500, Doug wrote:
...
 I picked up an ET-3400 6800 CPU trainer today.  It was
obviously abused by
several students in a past life.  I've resoldered its broken connections,
and it seems to work OK, but I can't fully test it yet because I'm missing
the seven-segment LEDs and the monitor ROM.

I happended to have the manual for a 1977 version of this trainer, but my
trainer appears to be from 1987 or so and has a few differences (for one,
it uses a 6802 rather than a 6800).  Luckily, the manual has a listing of
the monitor ROM.  But I don't have a 6800 assembler.

So, does anybody have any of the following:

1) A monitor ROM image (preferably for a 1987 model)
2) A 6800 assembler (preferably Linux-hosted, but DOS will work)
3) The EPROM part number for this board (the man. mentions MCM6830A, but
that doesn't ring a bell with me)
4) Part numbers for the 7-segment LEDs (I only have Heathkit part nos.)
5) A spare "1" key for my keypad :-)
 I kooked on the net, but didn't find any info on the ET-3400. I did find
this page on the EC-1, however:
http://www.cyberventure.com/heathkit/computers/ec-1.html

At least the LED's should be able to be replaced if uou know their sizes and
whether C Anode or C Cathode. Looking in catalogs like Jameco, the part
numbers don't help my memory, but the size/descriptions do.
Have wished to see a Heath cross reference for things like IC's, transistors.,
collected from a large number of their manuals. I have at least 1 2716 with
a Heath number on it- have no idea what it's for.
-Dave