Heathkit ET-3400

From: Doug Yowza <yowza_at_yowza.com>
Date: Sun Jun 28 04:06:59 1998

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 :-)

-- Doug
Received on Sun Jun 28 1998 - 04:06:59 BST