MMD-2

From: dave dameron <ddameron_at_earthlink.net>
Date: Wed Oct 14 01:04:36 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
Received on Wed Oct 14 1998 - 01:04:36 BST

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