This Trainer was called the Dyna-Micro
Here is the Memory allocation:
Hi Lo
000 000 \
> Key Prom
000 377 /
001 000 \
> Optional ROM
002 377 /
002 000 \
> Optional R/W Memory
003 377 /
003 000 \
> R/W Memory
003 377 /
004 000 \
> Available for user expansion
377 377 /
Will post more later
Does anyone knows where I can find a 1702 programmed with KEX?
Francois
-------------------------------------------------------------
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-----Original Message-----
From: Glenn Roberts <groberts_at_mitre.org>
To: Discussion re-collecting of classic computers
<classiccmp_at_u.washington.edu>
Date: Wednesday, April 15, 1998 9:12 PM
Subject: 8080 Trainer - more info
>Tony Duell originally asked this but the group may be interested. The MMD1
>8080 trainer was based on a design by Jonathan Titus and Company (Tychon
>Inc.) and was apparently described in a series of articles in the May-July
>1976 Radio Electronics, however it is also described in "The 8080a
Bugbook",
>a Howard Sams book (ISBN 0-672-21447-4), 1977.
>
>Tony: the two ROM sockets are for 1702 ROMS. The very simple but efficient
>monitor, called KEX for "Keyboard Executive", easily fits in the 256 byte
>space of one of these, leaving ROM socket 1 for "expansion".
>
>I don't have access to the original articles on this unit but it was easy
>enough to reverse engineer the assembly listing of KEX, below. I'd give
>y'all instructions on using the monitor but that would take the fun out of
>reading the source listing! i've also stuck the HEX file at the end of the
>listing. have fun!
>
Received on Thu Apr 16 1998 - 07:22:55 BST