mm8000k1 computer kit elenco.pdf
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MICRO - MASTER
MM-80008085 MICROPROCESSOR - BASIC SYSTEMS COURSE
COMPUTER THEORY - CONSTRUCTION
AND PROGRAMMING
Copyright 2008, 1989 by Elenco Electronics, Inc. All r ights reserved. Revised 2008 REV-D 753808No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.
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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 Functional 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 RoutineLesson 13 Program 4; Function 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 Flow Chart
Appendix 4 Schematic Diagram
Appendix 5 PC Board Layout
I
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PARTS LIST
Qty Description Part #RESISTORS
9 1505% 1/4W 131500
1 4705% 1/4W 134700
1 5105% 1/4W 135100
3 6805% 1/4W 136800
1 1k5% 1/4W 141000
8 1.2k5% 1/4W 141200
3 2k5% 1/4W 142000
14 3.9k5% 1/4W 143900
8 6.8k5% 1/4W 146800
14 10k5% 1/4W 151000
5 47k5% 1/4W 154700
2 68k5% 1/4W 156800
CAPACITORS
1 20pF Discap 212080
1 330pF Discap 223317
10 0.1F Discap 251010 1 10F 16V Electrolytic 271054
2 100F 25V 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 9LF99
Note: The 8156 IC has been replaced with an 8155The 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 DMMMeter (optional)
Scotch
Tape(1/2 wide)
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IntroductionThe most important factor in assembling your MM-8000 Micro-Master Kit is good soldering techniques. Usingthe 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 ComponentsIn all of the following assembly steps, the components must be installed on the top side of the PC board unlessotherwise indicated. The top legend shows where each component goes. The leads pass through thecorresponding 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
Foil
Solder
Soldering Iron
Foil
Component Lead
Soldering Iron
Circuit Board
Foil
Rosin
Soldering iron positioned
incorrectly.
Solder
Gap
Component Lead
Solder
Soldering Iron
DragFoil
1. Solder all components from
the copper foil side only.Push the soldering iron tip
against both the lead andthe circuit board foil.
2. Apply a small amount of
solder to the iron tip. This
allows the heat to leave theiron and onto the foil .
Immediately apply solder tothe opposite side of the
connection, away from theiron. Allow the heated
component and the circuit
foil to melt the solder.
1. Insufficient heat - thesolder will not flow onto the
lead as shown.
3. Allow the solder to f low
around the connection.Then, remove the solderand the iron and let the
connection cool. The soldershould have flowed
smoothly and not lump
around the wire lead.
4. Here is what a good solder
connection looks like.
2. Insufficient solder- let thesolder flow over the
connection until it is covered.Use just enough solder to
cover the connection.
3. Excessive solder - couldmake connections that you
did not intend to betweenadjacent foi l areas or
terminals.
4. Solder bridges - occurwhen solder runs between
circuit paths and creates a
short circuit. This is usuallycaused by using too much
solder. To correct this,simply drag your soldering
iron across the solder bridge
as shown.
What Good Soldering Looks LikeA good solder connection should be bright, shiny,
smooth, and uniformly flowed over all surfaces.
Types of Poor Soldering Connections
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(may bemarked C1on the PC
board)
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Clip on heat sink and installat a 45O angle as shown.
* Warning:If the capacitor isconnected with incorrect
polarity, it may heat up and
either leak or cause thecapacitor to explode.
*
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3.9kResistor
R43 R2
2N3904 Transistor
Q3
680Resistor
R69
10kResistor
R14
47kResistor
R8
68kResistor
R10
2kResistor
R12 R9
680Resistor
R6
10kResistor
R45
SPDT Switch
SW4 SW6
3.9kResistor
R13
Jumper
J10
Use a discardedresistor lead.Before installing, cut off
ears
330pF Discap (330)
C15
C11
Figure 3-1
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This switch connected to the 8155 integrated circuit chip enable (CE) pin through transistor Q3. When the
switch is down (toward the edge of the board) the transistor is turned off.The CE pin is held high by resistor
R69. In this state the 8155 is disabled and will ignore input data on all of its other pins. When the switch isup, the transistor turns on and the CE pin is held near ground. In this state, the 8155 is enabled and will
respond to inputs on the other pins. In a later lesson, the reset switch will be used to allow address lineA15 to control the CE input.
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T1T2TWAITT3T4T5T6TRESETTHALTTHOLD
X
XX
X11
1X
0X
X
XX
X0*0*
0*TS
TSTS
X
XX
XXX
XTS
TSTS
X
XX
XTSTS
TSTS
TSTS
1
XX
X11
1TS
TSTS
1
XX
X11
11
11
1
00
000
00
00
Status & Buses Control
S1,S0 IO/M A8-A15 AD0-AD7RD,WR INTA ALEMachine
State
0=Logic 0 1=Logic1 TS=High Impedance X=Unspecified
ALE not generated during 2nd and 3rd machine cycles ofDAD instruction.
* IO/M = 1 duringT4- T6states of RST and INA cycles.
Figure 7-118085A MACHINE STATE CHART
Figure 7-10 8085A CPU STATE TRANSISTION
= CPU STATE Tx ALL CPU STATE TRANSISTIONS OCCUR ONTHE FALLING EDGE OF CLK
= A DECISION (X) THAT DETERMINES WHICH SEVERALALTERNATIVE PATHS TO FOLLOW.
= PERFORM THE ACTION X.
= FLOWLINE THAT INDICATES THE SEQUENCE OF EVENTS.
= FLOWLINE THAT INDICATES THE SEQUENCE OF EVENTSIF CONDITION X IS TRUE.
= NUMBER OF CLOCK CYCLES IN THE CURRENT MACHINE
CYCLE.
= BUS IDLE MACHINE CYCLE = MACHINE CYCLE WHICHDOESNT USE THE SYSTEM BUS.
= VALID INTERRUPT - AN INTERRUPT IS PENDING THAT ISBOTH ENABLED AND UNMASKED (MASKING ONLYAPPLIES FOR RST 5.5, 6.5, AND 7.5 INPUTS).
= INTERNAL HOLD ACKNOWLEDGE FLIP FLOP. NOTE THATTHE 8085A SYSTEM BUSES ARE 3-STATED ONE CLOCKCYCLE AFTER THE HLDA FLIP FLOP IS SET.
TX
X
X
CC
X
BIMC
VALIDINT
HLDA FF
NOTE: SYMBOL DEFINITION
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Table 8-2 - 8085A INSTRUCTION SET SUMMARY BY FUNCTIONAL GROUPING
Instruction Code (1)Mnemonic Description D7 D6 D5 D4 D3 D2 D1 D0
MOVE, LOAD, AND STOREMOVr1 r2 Move register to register 0 1 D D D S S S
MOV M.r Move register to memory 0 1 1 1 0 S S S
MOV r.M Move memory to register 0 1 D D D 1 1 0
MVI r Move immediate to register 0 0 D D D 1 1 0MVI M Move immediate to memory 0 0 1 1 0 1 1 0LXI B Load immediate register Pair B & C 0 0 0 0 0 0 0 1
LXI D Load immediate register Pair D & E 0 0 0 1 0 0 0 1
LXI H Load immediate register Pair H & L 0 0 1 0 0 0 0 1STAX B Store A indirect 0 0 0 0 0 0 1 0
STAX D Store A indirect 0 0 0 1 0 0 1 0LDAX B Load A indirect 0 0 0 0 1 0 1 0
LDAX D Load A indirect 0 0 0 1 1 0 1 0STA Store A direct 0 0 1 1 0 0 1 0
LDA Load A direct 0 0 1 1 1 0 1 0
SHLD Store H & L direct 0 0 1 0 0 0 1 0LHLD Load H & L direct 0 0 1 0 1 0 1 0
XCHG Exchange D & E, H & L registers 1 1 1 0 1 0 1 1
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8085A INSTRUCTION SET SUMMARY (Contd)Instruction Code (1)
Mnemonic Description D7 D6 D5 D4 D3 D2 D1 D0
STACK OPSPUSH B Push register Pair B & C on stack 1 1 0 0 0 1 0 1PUSH D Push register Pair D & E on stack 1 1 0 1 0 1 0 1PUSH H Push register Pair H & L on stack 1 1 1 0 0 1 0 1PUSH PSW Push A and Flags on stack 1 1 1 1 0 1 0 1POP B POP register Pair B & C off stack 1 1 0 0 0 0 0 1POP D POP register Pair D & E off stack 1 1 0 1 0 0 0 0POP H POP register Pair H & L off stack 1 1 1 0 0 0 0 1POP PSW POP A and Flags off stack 1 1 1 1 0 0 0 1XTHL Exchange top of stack, H & L 1 1 1 0 0 0 1 1SPHL H & L to stack pointer 1 1 1 1 1 0 0 1LXI SP Load immediate stack pointer 0 0 1 1 0 0 0 1INX SP Increment stack pointer 0 0 1 1 0 0 1 1DCX SP Decrement stack pointer 0 0 1 1 1 0 1 1
JUMPJMP Jump unconditional 1 1 0 0 0 0 1 1JC Jump on carry 1 1 0 1 1 0 1 0JNC Jump on no carry 1 1 0 1 0 0 1 0JZ Jump on zero 1 1 0 0 1 0 1 0JNZ Jump on no zero 1 1 0 0 0 0 1 0JP Jump on positive 1 1 1 1 0 0 1 0JM Jump on minus 1 1 1 1 1 0 1 0JPE Jump on parity even 1 1 1 0 1 0 1 0JPO Jump on parity odd 1 1 1 0 0 0 1 0PCHL H & L to program counter 1 1 1 0 1 0 0 1
CALLCALL Call unconditional 1 1 0 0 1 1 0 1CC Call on carry 1 1 0 1 1 1 0 0CNC Call on no carry 1 1 0 1 0 1 0 0CZ Call on zero 1 1 0 0 1 1 0 0CNZ Call on no zero 1 1 0 0 0 1 0 0CP Call on positive 1 1 1 1 0 1 0 0CM Call on minus 1 1 1 1 1 1 0 0
CPE Call on parity even 1 1 1 0 1 1 0 0CPO Call on parity odd 1 1 1 0 0 1 0 0
RETURNRET Return 1 1 0 0 1 0 0 1RC Return on carry 1 1 0 1 1 0 0 0RNC Return on no carry 1 1 0 1 0 0 0 0RZ Return on zero 1 1 0 0 1 0 0 0RNZ Return on no zero 1 1 0 0 0 0 0 0RP Return on positive 1 1 1 1 0 0 0 0RM Return on minus 1 1 1 1 1 0 0 0RPE Return on parity even 1 1 1 0 1 0 0 0RPO Return on parity odd 1 1 1 0 0 0 0 0
RESTART
RST Restart 1 1 A A A 1 1 1
INPUT/OUTPUTIN Input 1 1 0 1 1 0 1 1OUT Output 1 1 0 1 0 0 1 1
INCREMENT AND DECREMENTINR r Increment register 0 0 D D D 1 0 0DCR r Decrement register 0 0 D D D 1 0 1INR M Increment memory 0 0 1 1 0 1 0 0DCR M Decrement memory 0 0 1 1 0 1 0 1INX B Increment B & C registers 0 0 0 0 0 0 1 1INX D Increment D & E registers 0 0 0 1 0 0 1 1INX H Increment H & L registers 0 0 1 0 0 0 1 1
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8085A INSTRUCTION SET SUMMARY (Contd)
Instruction Code (1)Mnemonic Description D7 D6 D5 D4 D3 D2 D1 D0
INCREMENT AND DECREMENT (contd)DCX B Decrement B & C 0 0 0 0 1 0 1 1DCX D Decrement D & E 0 0 0 1 1 0 1 1DCX H Decrement H & L 0 0 1 0 1 0 1 1
ADDADD r Add register to A 1 0 0 0 0 S S SADC r Add register to A with carry 1 0 0 0 1 S S SADD M Add memory to A 1 0 0 0 0 1 1 0ADC M Add memory to A with carry 1 0 0 0 1 1 1 0ADI Add immediate to A 1 1 0 0 0 1 1 0ACI Add immediate to A with carry 1 1 0 0 1 1 1 0DAD B Add B & C to H & L 0 0 0 0 1 0 0 1DAD D Add D & E to H & L 0 0 0 1 1 0 0 1DAD H Add H & L to H & L 0 0 1 0 1 0 0 1DAD SP Add stack pointer to H & L 0 0 1 1 1 0 0 1
SUBTRACTSUB r Subtract register from A 1 0 0 1 0 S S SSBB r Subtract register from A with borrow 1 0 0 1 1 S S SSUB M Subtract memory from A 1 0 0 1 0 1 1 0SBB M Subtract memory from A with borrow 1 0 0 1 1 1 1 0SUI Subtract immediate from A 1 1 0 1 0 1 1 0SBI Subtract immediate from A with borrow 1 1 0 1 1 1 1 0
LOGICALANA r And register with A 1 0 1 0 0 S S SXRA r Exclusive OR register with A 1 0 1 0 1 S S SORA r OR register with A 1 0 1 1 0 S S SCMP r Compare register with A 1 0 1 1 1 S S SANA M And memory with A 1 0 1 0 0 1 1 0XRA M Exclusive OR memory with A 1 0 1 0 1 1 1 0ORA M OR memory with A 1 0 1 1 0 1 1 0CMP M Compare memory with A 1 0 1 1 1 1 1 0ANI And immediate with A 1 1 1 0 0 1 1 0XRI Exclusive OR immediate with A 1 1 1 0 1 1 1 0ORI OR immediate with A 1 1 1 1 0 1 1 0CPI Compare immediate with A 1 1 1 1 1 1 1 0
ROTATERLC Rotate A left 0 0 0 0 0 1 1 1RRC Rotate A right 0 0 0 0 1 1 1 1RAL Rotate A left through carry 0 0 0 1 0 1 1 1RAR Rotate A right through carry 0 0 0 1 1 1 1 1
SPECIALSCMA Complement A 0 0 1 0 1 1 1 1STC Set carry 0 0 1 1 0 1 1 1CMC Complement carry 0 0 1 1 1 1 1 1
DAA Decimal adjust A 0 0 1 0 0 1 1 1
CONTROLEI Enable interrupts 1 1 1 1 1 0 1 1DI Disable interrupt 1 1 1 1 0 0 1 1NOP No-operation 0 0 0 0 0 0 0 0HLT Halt 0 1 1 1 0 1 1 0
NEW 8085A INSTRUCTIONSRIM Read Interrupt Mask 0 0 1 0 0 0 0 0SIM Set Interrupt Mask 0 0 1 1 0 0 0 0
NOTES: 1 - DDS or SSS B 000, C 001, D 010, E011, H 100, L 101, Memory 110, A 111
2 - Two possible cycle times. (6/12) indicate instruction cycles dependent on condition flags.
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* Warning:If the capacitor is
connected with incorrectpolarity, it may heat up and
either leak or cause thecapacitor to explode.
*
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APPENDIX 3
Monitor Program
Flow Chart
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APPENDIX 4
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Elenco Electronics, Inc.150 Carpenter Avenue
Wheeling, IL 60090(847) 541-3800
Website: www.elenco.come-mail: elenco@elenco.com
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