Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
Experiment-1
THEORY:
What is a microprocessor?
Microprocessor is programmable, clock driven, register based electronic device that
reads binary information from storage device called memory, accepts binary data as
input and process the data according to instructions and produces binary result as an
output.
Why 8085 microprocessor?
It is a microprocessor with simple architecture and adequate instruction set that enable
to understand the programming concepts of hardware. Having learned the basic
concepts of 8085 microprocessor, student can adapt to advance microprocessor and
microcontroller environments very easily.
About 8085 microprocessor
The 8085 is an 8-bit microprocessor capable of addressing 64KB of memory. The device
has 40 pins, requires +5V supply, and generally operate with a 3 MHz single-phase
clock.
What is DYNA -85?
MICROFRIEND DYNA-85LU is a single board computer based on 8085A CPU designed
especially for training and development applications. It is equally useful for novice as
well as development engineers for studying the 8085A CPU and developing various
products based on the 8085A.
APPARATUS:
1. Computer system
Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
MICROFRIEND DYNA-85LU HARDWARE OVERVIEW:
Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
FEATURES OF MICROFRIEND DYNA-85LU KIT:
➢ CENTRAL PROCESSING UNIT:
MICROFRIEND DYNA-85LU is based on the Intel 8085A high performance CPU
operating at 3 MHz
➢ MEMORY:
Powerful system monitor has been provided on a 27128 EPROM covering 16K
bytes. This monitor included all standard command, functions, utility
subroutines and serial interface routines as well as line assembler/ dis-
assembler.
A 62256 battery backup RAM has been provided on board for inputting and
executing programs.
One 28 pin socket is provided for memory chips so that further expansion of
RAM / ROM is possible up to a maximum of 56K.
➢ LCD DISPLAY AND KEYBOARD INTERFACE:
An IBM compatible keyboard with 101 keys and 40x2 line LCD display is
provided for interface with the system using 89C2051 micro-controller interface
module. This interface is using SID/SOD lines of CPU, to simulate it in virtual
serial mode.
➢ PARALLEL I/O INTERFACE:
46 parallel I/O lines are provided on board, 22 from 8155 and 24 from 8255.
These lines are brought onto connector J2 ( for 8155 ) and J3 ( for 8255 ) and J8
(for 8255) optional.
➢ SERIAL I/O INTERFACE:
Serial I/O interface is available through RS232C compatible port. The SID and
SOD lines are used under software control for serial operation i.e. for hooking up
this trainer kit to serial port of a PC.
Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
➢ TIMER:
Three channels of 8253 chips, a 16 bit TIMER / COUNTER and one channel of 14
bit TIMER /COUNTER of 8155 are provided on board. All lines from 8253 are
provided on connector J7 and lines from 8155 are provided on J2.
➢ EXPANSION SLOT:
All address, Data, Control and Hardware interrupt lines are brought on to a 50
Pin FRC connector for system expansion. These lines are un-buffered so user has
to take care while expanding their system.
➢ MEMORY MAPPING:
The MICROFRIEND DYNA-85 has a flexible memory map, and for your
convenience for program development, the RAM has useful features such as
battery back-up.
0000H TO 3FFFH :
Monitor EPROM socket. Monitor 27128 is located at 0000H to 3FFFH
4000H to BFFFH:
This Socket is used for user expansion of EPROM & RAM. EPROM’ s like 2716 /
2732 / 2732 / 2764 / 27128 / 27256 or RAM’ s like 6116 / 6264 / 62256 can be
installed by suitable strapping.
C000H to FFFFH:
User RAM socket. The 8K user RAM IC 62256 is located at C000H to FFFFH
Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
SAMPLE PROGRAM TO LOAD AND EXECUTE ON MICROFRIEND DYNA-85LU KIT
Load the Accumulator with 44h and copy the content of register A into register B.
Hex
Address Label Mnemonics Comments
Code
Programming in 8085 Compiler:
Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
PROCEDURE TO LOAD PROGRAM ON MICROFRIEND DYNA-85LU KIT
STEP 1: Connect the output line of SMPS to the Microprocessor kit
Obs. 1: DYNA_85 appears on the LCD display screen
Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
Step 2: Press A followed by the address location. For ex: A C000
Step 3: Write the programming
MVI A, 44 <Enter>
MOV B, A <Enter>
RST 1 <Enter> <Esc>
Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
Step 4: To run the program. Write GO “Address” For Ex: GO C000. Press Enter and Space
Step 5: To observe the output in the register, Type R and press enter
Obs 2: The output will be displayed on LCD display
Marwadi University
Department of Computer Engineering
Aim:(i)Introduction to 8085 microprocessor
Subject: Fundamental of (ii) Study of DYNA-85 trainer kit.
Processors (01CE0509) (iii) Perform any 8085 program and learn timing diagram.
Experiment No: 01 Date: Enrollment No: 92310103021
Conclusion:
