EE323: Microprocessor Systems Design Lab PDF

IGEE University M’Hamed Bougara of Boumerdes EE323: Microprocessor Systems Design Lab N°1 Getting Started with MDA-WinZ80 Training Kit 1 Objective The object...

IGEE University M’Hamed Bougara of Boumerdes EE323: Microprocessor Systems Design Lab N°1 Getting Started with MDA-WinZ80 Training Kit 1 Objective The objective of this lab is to introduce theMDA-WinZ80 training kit and to get familiar with writing, assembling and executing assembly programs. MDA-WinZ80 kit is a low-cost single board computer designed for self-learning the Z80 microprocessor. 2 Before the Lab 1. Download and install the Z80 simulator IDE to your own computer (you can find the in EE321 course website). In the installed folder, open “z80gettingstarted.pdf” file and go through example 1. 2. Download from EE321course website “MDA-WinZ80 User Manual” and read sections 1 and 2 of the manual. 3. Give the HEX code of the programs of tasks 1 and 2. You can convert the assembly program using Z80 simulator or Z80 instruction table. Which operation is implemented by this program? What is the content of A at the end of the program? 4. Test the program of task 2 using Z80 simulator. Discuss the affected flags. 5. Write a program for the task 3 (32-bit addition). Test your program using Z80 simulator. Give the HEX code of your program. 3 Lab grading This lab is scheduled for 1 week (3 hours) and will be graded based on: 1) Preparation. 2) Completion of the experiment, obtained results and their interpretation. During the lab, you must show the obtained results to your teacher. Before moving to a new lab experiment (task), you have to demonstrate that your implementation is working correctly, and you must show your understanding of the experiment. To evaluate your comprehension; you may have to answer oral questions. 3) Answers to the questions. 4) Attendance to the lab. 5) Report sheet. For this lab, a report sheet will be used as lab report. You must put all your experiment results and the answers to the questions on this sheet and return it back at the end of the lab. When you finish a task and before moving to the next task, you should get your teacher’s signature for the results of the finished task. To evaluate your comprehension, during the demonstration, you may have to answer other questions not included in the lab assignment. ______________________________________________________________________________________________________________ EE323: Microprocessor Systems Design – Lab 1 1/4 A. Khouas 4 MDA-WinZ80 kit The MDA-WinZ80 kit is a low-cost single board computer designed for self-learning the popular Z80 Microprocessor. The kit enables studying low level programming with direct machine code entering. A nice feature, single-step running, helps students learn the operation of microprocessor instructions quickly and clearly. The user registers provide simple means to verify the code execution. To interact with the MDA-WinZ80 kit, we can use the following main components: LCD display, keypad, Speaker, RS-232, dot matrix LED, AD and DA converters, DC motor, stepping motor, and I/O ports. 4.1 LCD Display The MDA-WinZ80 kit has LCD display which shows the address/data content of the memory, and displays messages and the content of the Z80 registers. 4.2 Keypad The MDA-WinZ80 kit has 16-key HEX digit (0-F) and 8 function keys: RES: This key causes a hardware reset and starts the monitor. AD: This key is used to set the current memory address. DA: This key is used to update the data of the current memory address. REG: This key allows examining the CPU Registers. GO: This key allow running the programs at full speed. STP: This key allows running the programs, one instruction at a time. +/-: These keys increment/decrement the current memory address. 4.3 I/O Port Map Address I/O port Description 00H: Instruction register 00H – 03H LCD 01H: Data register 04H – 0BH Keypad Read key input and write key flag 0CH: Data register 0CH – 0FH 8251A (RS-232 ) 0EH: Control/status register 10H/11H/12H: A/B/C port registers 10H – 13H PPI (8255A) 13H: control register 14H/15H: A/B port data registers 14H – 17H PIO 16H/17H: A/B port control registers 18H – 1BH Counter Timer Circuit 18H/19H/1AH/1BH: Channels 1/2/3/4 A/D converter and 1CH/1DH/1EH: A/B/C port registers 1CH – 1FH DOT-matrix 1FH: control register 20H - 3FH I/O extend connector 40H - FFH User’s range 4.4 Memory Map Location Description 0000 – 1FFF 8K Monitor ROM 2000 – 3FFF 8K program and data RAM 4000 - FFFF Users range ______________________________________________________________________________________________________________ EE323: Microprocessor Systems Design – Lab 1 2/4 A. Khouas 5 Tasks 5.1 Task 1: First Z80 Assembly Program The objective of this task is to get started with the MDA-WINZ80 kit by loading and executing a simple Z80 assembly program. LD A, 0FH 1) To load into the memory starting at address 2000H the LD B, 0AH HEX code of the simple assembly program, you LD C, 04H should press the following sequence of the keys: AD, ADD A, B 2000 DA 3E+0F+06+0A+0E+05+80+91+71+ SUB C 2) To check your program, press AD 2000 + + … + HALT Figure 1: First Z80 3) To execute all the program, you should press AD assembly program. 2000 GO. 4) To execute the program step by step, you should press AD 2000 STP STP … STP. After each step, the content of the registers are displayed and you can move between registers using + and - Keys. 5) Execute the program step by step and give the content of register A and the status of the flags after each instruction. Discuss the obtained results? 6) Get your results checked by your teacher. 7) Give the address and the size of each instruction. What is the size of the program? 8) Which memory location should be modified to test your program with another value of register C. Which sequence of the keys we should press? 5.2 Task 2: Memory Load and Arithmetic Operations The objective of this task is to get familiar with memory load instruction, arithmetic operations and flags. 1) Explain the function of the program of Figure 2. Give LD IX, 3000H the HEX code of the program LD A, (IX+0) 2) Load the program and execute it. Explain the obtained ADD A, (IX+1) result. LD (IX+2),A 3) Using AD and DA keys, modify the content of HALT locations 3000H and 3001H to 0FH and 01H Figure 2: Task 2 respectively. Test the program again and explain the assembly program. obtained result. 4) Using step by step execution, give the status of the flags (C,V,N,Z and H) after by the execution of the ADD instruction. Justify the obtained result. 5) Repeat steps 3) and 4) with the values FFH and 01H. 6) Repeat steps 3) and 4) with the values 72H and 13H. 7) Get your results checked by your teacher. 8) Explain how we can modify this program to use HL pair register instead of IX register. 5.3 Task 3: 32-bit addition Z80 is an 8-bit processor; it works mainly with 8-bit data and the arithmetic and logical instructions work with 8-bit data, the 16-bit arithmetic operations are provided to process 16-bit memory addresses. The objective of this task is to learn how to process multi-byte data. For the ADD operation, ______________________________________________________________________________________________________________ EE323: Microprocessor Systems Design – Lab 1 3/4 A. Khouas  1) Write a program to add two 32-bit numbers stored at locations 3000-3003H and 3004-3007H and save the result at location 3008-300BH. For the stored 32-bit numbers, you should use Little-Endian order, the least-significant byte is stored first (e.g. 3000H) and the most-Significant byte is stored last (e.g. 3003H). 2) Assemble and test your program using Z80 simulator. 3) Load the program and execute it. Explain the obtained result. 4) Using AD and DA keys, modify the content of locations 3000-3008H to test your program with the following numbers: 0FFFFFFFH and 00000002H. Test the program with the new numbers and explain the obtained result. 5) Repeat step 3) with the values 89ABCDEFH and 6789ABCDH. 6) Get your results checked by your teacher. Put your assembly program and the HEX code on the report sheet. What is the size of your program? 7) Explain how you can modify your program to add two 32-bit numbers without using ADC instruction. ______________________________________________________________________________________________________________ EE323: Microprocessor Systems Design – Lab 1 4/4 A. Khouas