Specify the register contents and flag status as the following instructions are executed. A XX B XX S X Z X CY X MVI A, FFH RRC MOV B,A ADD B RAR DCR A HLT
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Specify the register contents and flag status as the following instructions are executed.
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A XX |
B XX |
S X |
Z X |
CY X |
MVI A, FFH |
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RRC |
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MOV B,A |
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ADD B |
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RAR |
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DCR A HLT |
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- 1.Show the status of PSW (Program status word) after addition of two 8bit numbers 26H and 3FH. Also draw status of flag register with help of diagram? 2. Mention the addressing mode, function and how many bytes instruction for the following instructions? ADI 42H b. LXI H, 2500H c. RLC 3. Write assembly language program to add to 8-bit numbers with carry. First numbers stored on memory location 2500h, second number on 2501H and store 8bit result on memory location 2502H and carry on 2503H.Identify the contents of the registers, the memory location (C055H), and the flags as the following instructions are executed in 8085 microprocessor. A H L S Z CY M(C055H) LXIH, C055H MVI M,8AH MVI A,76H ADD M STA C055H HLT. Flag Register is a special purpose. Name two types of registers used in 8086 microprocessor. Consider the given example and explain how over flow, carry, parity and auxiallry flag will work on these instruction. MOV AL, 50 (50 is 01010000 which is positive) MOV BL, 32 (32 is 00110010 which is positive) DD AL, BL (82 is 10000010 which is negative)
- Write the contents of AL and BL register after execution of the programMOV AL, FFhMOV BL, ALCMP AL, F0HSUB BL,10HHLT1.How could you reset an 8-bit serial in-serial out shift register? 2.A binary number is shifted 4 positions to the left. What is the number?An eight bit number, 01011101, is: 1)added to 4 2) subtracted from -10 3) ANDED with 15 a) What is the outcome of these operations in binary? b) What is this number in decimal? c) What is the original number in decimal?
- You are given the following assembly language statements: MOV AX, 15225 MOV BL, 126 DIV BL SUB BL, AL Just after the CPU finishes executing the SUB instruction, calculate the following: i)The decimal values in AL, AH, and AX registers ii)The decimal value of BL iii)The values of flag bits: Sign, Carry, Auxiliary, Zero, Parity, and Overflow.3a) Show the truth table for JK flipflop for positive edge clock triggering. 3b) if for time period T=1ms, level triggering clock signal changes as 10111 then show the output for the input, D=01001(Use D flipflop)3c) Make a 6-bit serial register.Assume the register pair HL contains the value 1234H. What does it contain after executing the instruction DAD H?
- The processor has performed the following addition operation: 0x01A0+ 0xC410------0xC5B0 What decimal numbers did the processor add up, and what is the result of the addition if the programmer chose these numbers to be signed 16-bit number, where the lower four bits represent the fractional part of the number?Microprocessor 8085 : Note 1: Use F for fetch, R for memory read, W for memory write, IOR for IO read, and IOW for IO writeNote 2: Use hexadecimal where possible Q /- If register A contains (66 h) and CY=1, what is the result in the accumulator after (ADC A) instruction? - If register A contains (3A h) and register B contains (44 h), what are the results in the CY and Z flags after (CMP B) instruction?"In a buffer register, when the LOAD control signal is disabled or inactive, what is the content of the register?" high impedance all the bits are one all the bits are zero retain the previous content A tri-state buffer is needed for all data going to the W bus. True False "In a buffer register, when the LOAD control signal is enabled or active, the clock signal is loaded in the register. " True False The control signal Ep or iEnableoutput sends the contents of the register to the W bus. True False