Microprocessor Lab Report

Anonymous
timer Asked: Jun 18th, 2018
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Question description

Lab 1: Introduction to The Debug Programming.

I only need screen shots for each step, Calculation of the physical address, and a conclusion.

Please check the lab attached

Objective: • Access to the DEBUG program • Examine end modify the contents of Registers • Utilize some of DEBUG facilities • Calculate the physical address of the Memory Procedure: 1. To have access to the DEBUGprogram, the following command will be used at the start. • Click the BOXDOS Icon • At Z>: Type mount c c:/ • C>: prompt will appear, then Type cd TASM • C:\TASM> will be displayed then Type DEBUG as follows C:\TASM>DEBUG ⅃ When you see the underscore sign shown above, it means you have accessed the DEBUG program successfully. 2. To be able to examine the content of the Registers inside microprocessor the following command should be typed at the DEBUG Prompt: _R⅃ You should be able to see the content of all registers for instance as follows: AX =0000 BX =0000 CX =0000 DX =0000 SP =FFEE BP =0000 SI =0000 DI =0000 DS =0AED ES =0AED SS =0AED CS =0AED IP =0100 NV UP EI PL NZ NA PO NC 0AED:O100 8A07 MOV AL, {BX] Note that the last line is happened to be in the memory. Display the content of all registers in your computer: AX = DI = BX = DS = CX = ES = DX = SS = SP = CS = BP = IP = SI = Flag: 3. The DEBUG command allows you to modify the contents of Register inside microprocessor R For an example: _ R AX ⅃ AX 0000 : ABCD The content of AX register was changed from 0000 to ABCD. Please change the content of SI, DI, and AX to 1234, 5678, and 9ABC, respectively. Then, display the content of all registers: You are not allowed to modify a byte size registers. _ R AL ⅃ BR Error Can we change the content of the CL register? NO The following table will help you to determine the status of each flag bit. BIT Number 11 10 9 7 6 A 2 0 FLAG Overflow Direction Interrupt Sign Zero AC Parity Carry Flag Designation O D I S Z A P C SET OV DN EI NG ZR AC PE CY CLEAR NV UP DI PL NZ NA PO NC How one can change the Parity flag from Odd parity to Even parity? 4. Assemble (A) command The assemble command is used to provide the offset address for the memory so that one can enter the instruction code into the memory. _ A 100 ⅃ 0AED:O100 Where 0AED is the code segment and 0100 is Instruction Pointer (IP) Example (1): _ A100 ⅃ 0AED :0100 mov ax, 1000 0AED:0103 mov bx, 2000 0AED:0106 mov cx, 3000 0AED:0109 add ax, bx 0AED:010B add ax, cx 0AED:010D int 20 How can one assemble the program at offset address of 0150? 5. Unassembled (U)command The U command will display the machine code in memory along with their equivalent assembly language instructions. The format of the U command is as follows -U or -U Example (2): 0AED:0100 B80010 mov ax, 1000 0AED:0103 BB0020 mov bx, 2000 0AED:0106 B90030 mov cx, 3000 0AED:0109 01D8 add ax, bx 0AED:010B 01C8 add ax, cx 0AED:010D CD20 int 20 Assemble a program to input 1, 2, 3, 4, and 5 into register AL, BH, CL, DH, and SI respectively then unassembled your program and write the address, machine code, and assembly language code. 6. There are two ways to execute your program in the DEBUG environment a) The Go command (G) The go command informs the DEBUG to execute the entire program if the following format is used: _G⅃ But if the following format is used, the instructions between two given addresses will be executed: _ G= ⅃ Execute the program given in Example (1) using both G command methods and display the content of all registers. If there is a discrepancy in the results, explain the reason. b) The Trace command (T) This command allows you to trace through the execution of your code one line at a time. _T⅃ If it is desired to execute several instructions at a time, the following format is employed. _ T= Please use program in Example (1) to execute one line at a time and show the contents of all registers. 7. Calculate the physical address of the first and last instructions of Program in Example (1). Conclusion:

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Upbeat_Strom
School: Cornell University

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Anonymous
Awesome! Exactly what I wanted.

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