MM-8000K 8085 MICROPROCESSOR - BASIC SYSTEMS COURSE COMPUTER THEORY - CONSTRUCTION AND PROGRAMMING
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1 MICRO - MASTER MM-8000K 8085 MICROPROCESSOR - BASIC SYSTEMS COURSE COMPUTER THEORY - CONSTRUCTION AND PROGRAMMING ELENCO 150 Carpenter Avenue Wheeling, IL (847) Website: elenco@elenco.com Copyright 2017, 1989 by ELENCO All rights reserved. Revised 2017 REV-G No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.
2 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 Routine Lesson 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 A-19
3 APPENDI 4 Qty Description Part # RESISTORS r 9 150W 5% 1/4W r 1 470W 5% 1/4W r 1 510W 5% 1/4W r 3 680W 5% 1/4W r 1 1kW 5% 1/4W r 8 1.2kW 5% 1/4W r 3 2kW 5% 1/4W r kW 5% 1/4W r 8 6.8kW 5% 1/4W r 14 10kW 5% 1/4W r 5 47kW 5% 1/4W r 2 68kW 5% 1/4W CAPACITORS r 1 20pF Discap r 1 330pF Discap r mF Discap r 1 10mF 16V Electrolytic r 2 100mF 25V Electrolytic SEMICONDUCTORS r 2 A70 Transistor r 1 2N3904 Transistor r A or 9816A IC r 1 LM-7805 IC r IC r IC (see note) r 8 LED diode red r 1 LED diode green r 2 LED MAN71A / LTS72R / 312AR PARTS LIST Qty Description Part # MISCELLANEOUS r 1 74HC00 IC 39HC00 r 1 74HC04 IC 39HC04 r 1 74HCT573 IC 39T573 r 1 Transformer, wall-type r 1 PC board r 1 Switch PC mount DPDT r 15 Switch slide miniature SPDT r 29 Switch dimple dome triangle r 1 Heatsink clip-on r 1 Jack DC power PC mount r 1 Plastic case clear r 2 Velcro, hook HOOK r 2 Velcro, loop LOOP r 5 Rubber Feet r 4 IC socket 14-pin r 2 IC socket 16-pin r 1 IC socket 20-pin r 1 IC socket 24-pin r 2 IC socket 40-pin r 1 Label, keyboad r 1 Label, case r 1 Solder tube lead-free 9LF99 Note: The 8156 IC has been replaced with an 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 Long Nose Pliers Scotch Tape (1/2 wide) Phillips Screwdriver (small point size) Desoldering Pump A-18 Diagonal Cutters VOM, VTVM or DMM Meter (optional) Pencil Soldering Iron (25-40 watts) or Soldering Station II
4 APPENDI 3 Monitor Program Flow Chart III A-17
5 A-16 IV
6 V A-15
7 CONSTRUCTION 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 watts is recommended. The tip of the iron must be kept clean at all times and well-tinned. Solder For many years leaded solder was the most common type of solder used by the electronics industry, but it is now being replaced by lead-free solder for health reasons. This kit contains lead-free solder, which contains 99.3% tin, 0.7% copper, and has a rosin-flux core. Lead-free solder is different from lead solder: It has a higher melting point than lead solder, so you need higher temperature for the solder to flow properly. Recommended tip temperature is approximately 700 O F; higher temperatures improve solder flow but accelerate tip decay. An increase in soldering time may be required to achieve good results. Soldering iron tips wear out faster since lead-free solders are more corrosive and the higher soldering temperatures accelerate corrosion, so proper tip care is important. The solder joint finish will look slightly duller with lead-free solders. Use these procedures to increase the life of your soldering iron tip when using lead-free solder: Keep the iron tinned at all times. Use the correct tip size for best heat transfer. The conical tip is the most commonly used. What Good Soldering Looks Like A good solder connection should be bright, shiny, smooth, and uniformly flowed over all surfaces. Turn off iron when not in use or reduce temperature setting when using a soldering station. Tips should be cleaned frequently to remove oxidation before it becomes impossible to remove. Use Dry Tip Cleaner (Elenco #SH-1025) or Tip Cleaner (Elenco #TTC1). If you use a sponge to clean your tip, then use distilled water (tap water has impurities that accelerate corrosion). Safety Procedures Always wear safety glasses or safety goggles to protect your eyes when working with tools or soldering iron, and during all phases of testing. Be sure there is adequate ventilation when soldering. Locate soldering iron in an area where you do not have to go around it or reach over it. Keep it in a safe area away from the reach of children. Do not hold solder in your mouth. Solder is a toxic substance. Wash hands thoroughly after handling solder. 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! Types of Poor Soldering Connections 1. Solder all components from the copper foil side only. Push the soldering iron tip against both the lead and the circuit board foil. Component Lead Foil Soldering Iron 1. Insufficient heat - the solder will not flow onto the lead as shown. Rosin Circuit Board Soldering iron positioned incorrectly. 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. 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. Solder Foil Solder Foil Soldering Iron Soldering Iron 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. Solder Gap Component Lead Solder Soldering Iron Foil Drag A-14 VI
8 VII A-13
9 A
10 1-2 A-11
11 ASSEMBLY INSTRUCTIONS Peel off protective paper from the bottom of the rubber feet and apply to the solder side of the PC board as shown. Do not cover solder pads A
12 (may be marked C1 on the PC board) 2-2 A-9
13 * Clip on heat sink and install at a 45 O angle as shown. * Warning: If the capacitor is connected with incorrect polarity, it may heat up and either leak or cause the capacitor to explode. A-8 2-3
14 2-4 A-7
15 A-6 2-5
16 2-6 A-5
17 A-4 3-1
18 3.9kW Resistor r R43 r R2 2N3904 Transistor r Q3 680W Resistor r R69 10kW Resistor r R14 47kW Resistor r R8 68kW Resistor r R10 C11 2kW Resistor r R12 r R9 680W Resistor r R6 330pF Discap (330) r C15 10kW Resistor r R45 SPDT Switch r SW4 r SW6 3.9kW Resistor r R13 Jumper r J10 Before installing, cut off ears Use a discarded resistor lead. Figure A-3
19 Unplug connector S3 to remove all power from the PC board. Identify and install the following parts as shown in figure 3-2. After soldering each part, place a check in the box provided. A-2 3-3
20 3-4 A-1
21 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 is up, 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 line A15 to control the CE input
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29 Figure
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38 * Warning: If the capacitor is connected with incorrect polarity, it may heat up and either leak or cause the capacitor to explode. *
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42 NOTE: SYMBOL DEFINITION Figure A CPU STATE TRANSISTION CC T BIMC VALIDINT HLDA FF = CPU STATE T x ALL CPU STATE TRANSISTIONS OCCUR ON THE FALLING EDGE OF CLK = A DECISION () THAT DETERMINES WHICH SEVERAL ALTERNATIVE PATHS TO FOLLOW. = PERFORM THE ACTION. = FLOWLINE THAT INDICATES THE SEQUENCE OF EVENTS. = FLOWLINE THAT INDICATES THE SEQUENCE OF EVENTS IF CONDITION IS TRUE. = NUMBER OF CLOCK CYCLES IN THE CURRENT MACHINE CYCLE. = BUS IDLE MACHINE CYCLE = MACHINE CYCLE WHICH DOESN T USE THE SYSTEM BUS. = VALID INTERRUPT - AN INTERRUPT IS PENDING THAT IS BOTH ENABLED AND UNMASKED (MASKING ONLY APPLIES FOR RST 5.5, 6.5, AND 7.5 INPUTS). = INTERNAL HOLD ACKNOWLEDGE FLIP FLOP. NOTE THAT THE 8085A SYSTEM BUSES ARE 3-STATED ONE CLOCK CYCLE AFTER THE HLDA FLIP FLOP IS SET. Machine State T 1 T 2 T WAIT T 3 T 4 T 5 T 6 T RESET T HALT T HOLD Status & Buses Control S1,S0 IO/M A 8 -A 15 AD 0 -AD 7 RD,WR INTA ALE * 0* 0* TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS =Logic 0 1=Logic 1 TS=High Impedance =Unspecified ALE not generated during 2nd and 3rd machine cycles of DAD instruction. * IO/M = 1 during T 4 - T 6 states of RST and INA cycles. Figure A MACHINE STATE CHART
43 8085A INSTRUCTION SET SUMMARY (Cont d) Instruction Code (1) Mnemonic Description D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 INCREMENT AND DECREMENT (cont d) DC B Decrement B & C DC D Decrement D & E DC H Decrement H & L ADD ADD r Add register to A S S S ADC r Add register to A with carry S S S ADD M Add memory to A ADC M Add memory to A with carry ADI Add immediate to A ACI Add immediate to A with carry DAD B Add B & C to H & L DAD D Add D & E to H & L DAD H Add H & L to H & L DAD SP Add stack pointer to H & L SUBTRACT SUB r Subtract register from A S S S SBB r Subtract register from A with borrow S S S SUB M Subtract memory from A SBB M Subtract memory from A with borrow SUI Subtract immediate from A SBI Subtract immediate from A with borrow LOGICAL ANA r And register with A S S S RA r Exclusive OR register with A S S S ORA r OR register with A S S S CMP r Compare register with A S S S ANA M And memory with A RA M Exclusive OR memory with A ORA M OR memory with A CMP M Compare memory with A ANI And immediate with A RI Exclusive OR immediate with A ORI OR immediate with A CPI Compare immediate with A ROTATE RLC Rotate A left RRC Rotate A right RAL Rotate A left through carry RAR Rotate A right through carry SPECIALS CMA Complement A STC Set carry CMC Complement carry DAA Decimal adjust A CONTROL EI Enable interrupts DI Disable interrupt NOP No-operation HLT Halt NEW 8085A INSTRUCTIONS RIM Read Interrupt Mask SIM Set Interrupt Mask NOTES: 1 - DDS or SSS B 000, C 001, D 010, E011, H 100, L 101, Memory 110, A Two possible cycle times. (6/12) indicate instruction cycles dependent on condition flags
44 A INSTRUCTION SET SUMMARY (Cont d) Instruction Code (1) Mnemonic Description D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 STACK OPS PUSH B Push register Pair B & C on stack PUSH D Push register Pair D & E on stack PUSH H Push register Pair H & L on stack PUSH PSW Push A and Flags on stack POP B POP register Pair B & C off stack POP D POP register Pair D & E off stack POP H POP register Pair H & L off stack POP PSW POP A and Flags off stack THL Exchange top of stack, H & L SPHL H & L to stack pointer LI SP Load immediate stack pointer IN SP Increment stack pointer DC SP Decrement stack pointer JUMP JMP Jump unconditional JC Jump on carry JNC Jump on no carry JZ Jump on zero JNZ Jump on no zero JP Jump on positive JM Jump on minus JPE Jump on parity even JPO Jump on parity odd PCHL H & L to program counter CALL CALL Call unconditional CC Call on carry CNC Call on no carry CZ Call on zero CNZ Call on no zero CP Call on positive CM Call on minus CPE Call on parity even CPO Call on parity odd RETURN RET Return RC Return on carry RNC Return on no carry RZ Return on zero RNZ Return on no zero RP Return on positive RM Return on minus RPE Return on parity even RPO Return on parity odd RESTART RST Restart 1 1 A A A INPUT/OUTPUT IN Input OUT Output INCREMENT AND DECREMENT INR r Increment register 0 0 D D D DCR r Decrement register 0 0 D D D INR M Increment memory DCR M Decrement memory IN B Increment B & C registers IN D Increment D & E registers IN H Increment H & L registers
45 Table A INSTRUCTION SET SUMMARY BY FUNCTIONAL GROUPING Instruction Code (1) Mnemonic Description D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 MOVE, LOAD, AND STORE MOVr1 r2 Move register to register 0 1 D D D S S S MOV M.r Move register to memory S S S MOV r.m Move memory to register 0 1 D D D MVI r Move immediate to register 0 0 D D D MVI M Move immediate to memory LI B Load immediate register Pair B & C LI D Load immediate register Pair D & E LI H Load immediate register Pair H & L STA B Store A indirect STA D Store A indirect LDA B Load A indirect LDA D Load A indirect STA Store A direct LDA Load A direct SHLD Store H & L direct LHLD Load H & L direct CHG Exchange D & E, H & L registers
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