MMD-2 - test-drb@ccmp.vtda.org

13 Oct 1998

Hi Bill and all,
At 11:18 PM 10/12/98 -0400, you wrote:
...

Hey, I've got a couple of E&L MMD-2's here.  These are neat little
8080 educational SBC's.  Hex keypad, "function" keypad, 7-segment
LED's, and three sets of 8 LED's for I/O ports 0, 1, 2.  Includes
a cassette interface, bus expansion connector, serial interface,
and even an EPROM programmer for 2708/2716's.  Most impressive!

But I didn't get any sort of manuals with them.  I've figured
out most of the obvious stuff, but it would be nice to know the
format expected by the "load" function, the meaning of a few
unlabelled switches/jumpers, the meaning of "BRL HI" and "BRL LO",
and so on.
 Do you know if it's described in any magazine article? There is a 3 part
series about the first MMD in the May, June, July 1976 Radio Electronics. It
is an 8080 based system with 24 output bits and LED's, keypad, a solderless
breadboard, 256 bytes ram (2x 2111), and 256 bytes rom (1702A). The article
has the schematic and "monitor" listing and sample programs. I almost bought
one a few years ago, but the price was too much, USD $150. By the way, the
kit price back in 1976 was $350, assembled $500.
-Dave