Analyze the given program in which the value stored in 1000H is ABH. (i) Write the values of the registers after the execution of each instruction. (ii) Find the value stored in the memory location 41H after the execution of the program. (iii)What will be the status of flag bits of PSW after executing the program by changing the value of R4 from 100 to 75?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Analyze the given program in which the value stored in 1000H is ABH.
(i) Write the values of the registers after the execution of each instruction.
(ii) Find the value stored in the memory location 41H after the execution of the
program.
(iii) What will be the status of flag bits of PSW after executing the program by
changing the value of R4 from 100 to 75?
ORG 0000H
MOV DPTR,#1000H
MOV R4,#100
MOV R7,#10H
MOV A, #00H
MOVC A,@A+DPTR
LOOP: SUBB A,R4
DEC R7
JNZ LOOP1
JC LOOP2
INC R4
SJMP LOOP
LOOP2: MOV 65,#0FFH
SJMP Exit
LOOP1: MOV 65,R7
Exit: NOP
END
Transcribed Image Text:Analyze the given program in which the value stored in 1000H is ABH. (i) Write the values of the registers after the execution of each instruction. (ii) Find the value stored in the memory location 41H after the execution of the program. (iii) What will be the status of flag bits of PSW after executing the program by changing the value of R4 from 100 to 75? ORG 0000H MOV DPTR,#1000H MOV R4,#100 MOV R7,#10H MOV A, #00H MOVC A,@A+DPTR LOOP: SUBB A,R4 DEC R7 JNZ LOOP1 JC LOOP2 INC R4 SJMP LOOP LOOP2: MOV 65,#0FFH SJMP Exit LOOP1: MOV 65,R7 Exit: NOP END
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