State the contents of r20 after the following program executes movi r10, 0x0020 movi r20, 5 movi r21, 2 add r20, r20, r21 add r20, r20, r21 stw r20, 0x0100 (r10)
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- What this program portion is performing? MOV AX, 0300H MOV DS, AX MOV SI, 0010H MOV DI, 0010H MOV CL, OAH MOV AL, [SI] NEXT: CALL DO MOV [DI], AL INC SI INC DI LOOP NEXT HLT DO: SUB AL, 02H RET Move the content of memory locations started from DS: SI to another memory location started from DS:DI Subtract each of (10) memory locations started from 0300:0010 by 2. Subtract the content of AX by 2 and save at memory locations started from 0300:0010 None of them* The LOOP # will affect only CX O All CS, CX and IP Both CX and IP non of those only IPO if BX=1000, DS=0400, and AL=EDH, for the following instruction: MOV [BX] + 1234H, AL. the physical address is 6243H O 6324H 4244H O 6234H 4234HEX2: « Explain what happens as the following sequences of instructions are executed : . MOV DL.05H . MOV AX,0A00H . MOV DS AX . MOV SI,0H . MOV CX,0FH « Again: INC SI . CMP [SI].DL . LOGCPNE Again
- funCount: MOVLW .15 MOVWF Ox82 count: DECF Ox82 BNZ count RETURN Assuming Oscillator frequency is set to 4 Mhz, fill in the following blanks based on the execution of the above code segment: Instruction cycle period, Tinst = uSec Number of instruction cycles required to execute the code Total time to execute the code uSecThe following tables contains memory dump and contents of few registers, as follows: *** add cont reg cont Ox100 OXFF eax 0x100 Ox104 OXCD есх Ох1 Ox108 Ox22 edx 0x3 Ох10С Ох33 **** What is the value of the following operand 9[eax,edx] ? Select one: а. Ох103 b. Ox09 с. Ох33 d. 0x10CComputer Science A system call in an operating system is typically a function call that traps to the kernel. However, there are also library calls that are functions that do not directly trap into the kernel, but may invoke system calls that do. In MINIX, there is a corresponding library call read that always invokes the system call. In UNIX, there are also several other library calls---getc, fgetc, getchar, for example---that also input data. Describe the difference between the MINIX read library call and these functions. How do you think these functions (getc, fgetc, getchar) perform data input? Do they always need to ultimately trap to the kernel? Why or why not?
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- int i = 5; is a statement in a C program. A. during execution, value of i may change but not its address B. during execution both the address and value may change C. repeated execution may result in different addresses for i D. i may not have an associated addressThe following tables contains memory dump and contents of few registers, as follows: add cont reg cont Ox100 Oxff eax Ox100 Ox104 OXCD есх Ох1 Ох108 Ох22 edx 0x3 Ох10C Ох33 **** What is the value of the following operand 4[eax] ? Select one: a. OXFF b. Ox104 c. OXCD d. 0x103Assembly language 64-bit code The program will prompt the user for their name and then say hello to them using their name. For example, the interactive console of Repl.it might look like: > bash main.shEnter your name: *Camila *Hello, Camila> You will not have a library of routines to call upon for the printing and reading. You are manufacturing the complete setup and syscall. After you complete the reading, remember that .bss is for your variables that will receive data and .data is for fixed information, like prompts.