Elenco Electronics MM-8000 User manual

MICRO - MASTER®
MM-8000
8085 MICROPROCESSOR - BASIC SYSTEMS COURSE
COMPUTER THEORY - CONSTRUCTION
AND PROGRAMMING
Copyright © 2008, 1989 by Elenco®Electronics, Inc. All rights reserved. Revised 2008 REV-D 753808
No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

TABLE OF CONTENTS
Introduction
Lesson 1 Numbers
Lesson 2 Memory
Lesson 3 Storing and Reading Data
Lesson 4 Registers and Parts
Lesson 5 The Timer
Lesson 6 ROM
Lesson 7 unctional Description of 8085
Lesson 8 Instructional Set
Lesson 9 MM-8000 System-Monitor Program-Memory Map
Lesson 10 Program 1; Initialization of Monitor
Lesson 11 Program 2; Display/Delay Routines
Lesson 12 Program 3; Scan Routine
Lesson 13 Program 4; unction Routines
Lesson 14 Program 5; Addition of Number - Keyboard Entry
Appendix 1 Program Listings
Appendix 2 Detailed Description; Programs 1 thru 5
Appendix 3 Monitor Program low Chart
Appendix 4 Schematic Diagram
Appendix 5 PC Board Layout
I

II
PARTS LIST
Qty Description Part #
RESISTORS
9 150Ω5% 1/4W 131500
1 470Ω5% 1/4W 134700
1 510Ω5% 1/4W 135100
3 680Ω5% 1/4W 136800
1 1kΩ5% 1/4W 141000
8 1.2kΩ5% 1/4W 141200
3 2kΩ5% 1/4W 142000
14 3.9kΩ5% 1/4W 143900
8 6.8kΩ5% 1/4W 146800
14 10kΩ5% 1/4W 151000
5 47kΩ5% 1/4W 154700
2 68kΩ5% 1/4W 156800
CAPACITORS
1 20p Discap 212080
1 330p Discap 223317
10 0.1µDiscap 251010
1 10µ16V Electrolytic 271054
2 100µ25V Electrolytic 281045
SEMICONDUCTORS
2 A70 Transistor 320070
1 2N3904 Transistor 323904
1 2816A or 9816A IC 332816
1 LM-7805 IC 337805
1 8085 IC 338085
1 8155 IC (see note) 338155
8 LED Diode Red 350002
1 LED Diode Green 350010
2 LED MAN71A / LTS72R / 312AR 350071
Qty Description Part #
MISCELLANEOUS
1 74HC00 IC 39HC00
1 74HC04 IC 39HC04
1 74HCT573 IC 39T573
1 Transformer Wall Type 440409
1 PC Board 515030
1 Switch PC Mount DPDT 541023
15 Switch Slide Miniature SPDT 541102
29 Swirch Dimple Dome Triangle 546101
1 Heatsink Clip-on 615005
1 Jack DC Power PC Mount 621080
1 Plastic Case Black 623000
4 Screw #8 self-tapping 642862
4 IC Socket 14-pin 664014
2 IC Socket 16-pin 664016
1 IC Socket 20-pin 664020
1 IC Socket 24-pin 664024
2 IC Socket 40-pin 664040
4 Clip PCBMnt 688000
1 Label Keyboad 728000
1 Label Case 728004
1 Solder Tube Lead-free 9L 99
Note: The 8156 IC has been replaced with an 8155.
The difference between the two are the active state
of chip enable (CE).The CE on the 8155 is active low
(CE) and the 8156 is active high.
TOOLS REQUIRED
1/4” Blade Screwdriver
Phillips Screwdriver
(small point size)
Desoldering Pump
Pencil Soldering Iron (25-40 watts) or Soldering Station
Diagonal Cutters
Long Nose Pliers
VOM, VTVM or DMM
Meter (optional)
Scotch
Tape
(1/2” wide)

III

IV

V

VI
Introduction
The most important factor in assembling your MM-8000 Micro-Master®Kit is good soldering techniques. Using
the proper soldering iron is of prime importance. A small pencil type soldering iron of 25 - 40 watts is
recommended. The tip of the iron must be kept clean at all times and well tinned.
Safety Procedures
• Wear eye protection when soldering and during all phases of construction.
• Locate soldering iron in an area where you do not have to go around it or reach over it.
•Do not hold solder in your mouth. Wash your hands thoroughly after handling solder.
• Be sure that there is adequate ventilation present.
Assemble Components
In all of the following assembly steps, the components must be installed on the top side of the PC board unless
otherwise indicated. The top legend shows where each component goes. The leads pass through the
corresponding holes in the board and are soldered on the foil side.
Use only rosin core solder.
DO NOT USE ACID CORE SOLDER!
CONSTRUCTION
Solder Soldering Iron
oil
Solder
Soldering Iron
oil
Component Lead
Soldering Iron
Circuit Board
oil
Rosin
Soldering iron positioned
incorrectly.
Solder
Gap
Component Lead
Solder
Soldering Iron
Drag
oil
1. Solder all components from
the copper foil side only.
Push the soldering iron tip
against both the lead and
the circuit board foil.
2. Apply a small amount of
solder to the iron tip. This
allows the heat to leave the
iron and onto the foil.
Immediately apply solder to
the opposite side of the
connection, away from the
iron. Allow the heated
component and the circuit
foil to melt the solder.
1. Insufficient heat - the
solder will not flow onto the
lead as shown.
3. Allow the solder to flow
around the connection.
Then, remove the solder
and the iron and let the
connection cool. The solder
should have flowed
smoothly and not lump
around the wire lead.
4. Here is what a good solder
connection looks like.
2. Insufficient solder - let the
solder flow over the
connection until it is covered.
Use just enough solder to
cover the connection.
3. Excessive solder - could
make connections that you
did not intend to between
adjacent foil areas or
terminals.
4. Solder bridges - occur
when solder runs between
circuit paths and creates a
short circuit. This is usually
caused by using too much
solder. To correct this,
simply drag your soldering
iron across the solder bridge
as shown.
What Good Soldering Looks Like
A good solder connection should be bright, shiny,
smooth, and uniformly flowed over all surfaces.
Types of Poor Soldering Connections

VII

1-1

1-2

2-1

2-2
(may be
marked C1
on the PC
board)

2-3
Clip on heat sink and install
at a 45Oangle as shown.
* Warning: If the capacitor is
connected with incorrect
polarity, it may heat up and
either leak or cause the
capacitor to explode.
*

2-4

2-5

2-6

3-1

3-2
3.9kΩResistor
R43
R2
2N3904 Transistor
Q3
680ΩResistor
R69
10kΩResistor
R14
47kΩResistor
R8
68kΩResistor
R10
2kΩResistor
R12
R9
680ΩResistor
R6
10kΩResistor
R45
SPDT Switch
SW4
SW6
3.9kΩResistor
R13
Jumper
J10
Use a discarded
resistor lead.
Before installing, cut off
ears
330p Discap (330)
C15
C11
Figure 3-1

3-3

3-4