After the following program is executed, what is the content of R$4$ in hex?

ORG $00$H

MOV R$1,$ #$124$

MOV R$2,$ #$36$H

MOV R$3,$ #$44$H

$20$

TOTAL:

MOV A$,$ R$1$

MOV B$,$ R$2$

ICALL SUM

MOV B$,$ R$3$

LCALL SUM

MOV R$4,$ A$$

SUM:

ADD A$,$ B

RET

R$4-$

END

$8051$ conditional Jump instructions

Unconditional jump Instructions

JNZ

$12$

Jump if A $0$

Jump If A

LMP $($long jump$)$:

LIMP TARGET

SETB C

SIMP $($short jump$)$: Call Instructions

SIMP TARGET

CLR C

JAC

Jump if bit

$1$ and clear bit

CPLC

Jump if bit $0$

LCALL $($long call$)$:

Jump if bit $1$

ACALL $($absolute call$)$:

ACALL TARGET

JB

INC

JC

Jump if CY$-1$ if byte #data

SETB bit CLR bit

CINE reg, data Jump CINE A$,$ byte

Jump if A byte

CPL bit $($bit NOT bit$)$

DINZ

Decrement and Jump If A & D

$18$ bit, target $($Juma if bit$)$

Jump if CY$0$

Single bit instructions

Set the bit $($bit $1)$

$($CYb$)$ MOV B$,$C

MOV Ch $($b$-$CY$)$

JNC target

JC target ANI Cbit

Clear the bit $($bit $0)$

Complement the bit

ANL C$,/$bit AND CY with inverted bit and

save it on CY ORL C$,$bit

Jump to target if bit$-1$

INB bit target

Jump to target if bit O

$($jump if na bit$)$

Several instructions by which the carry flag can be manipulated directly

LCALL TARGET

Make CY$-1$

Clear carry bit $($CY $=01$

Complement carry bit status to bit location

Copy carry

Copy bit location status to carry

Jump to target if CY$-$O

Jump to target if CY$=1$

AND CY with bit and save it on CY

OR CY with bit and save it on CY

ORLC$/$bit OR CY with Inverted bit and

save it on CY

JBC bit, target Jump to target if bit $1,$

clear bit $($jump if bit, then clear$)$

The list of some instructions:

A$=$A$+$ source

ADD A$,$ source

ADDC $($add with carry$)$

Add two $16-$bit data operands, For Example: ADDC A$,$ #immediate,

DA A

SUBB A$,$ source

MUL AB

DIV AB ANL destination, source

ORL destination, source

decimal adjust for addition

AA$-$source$-$CY

AxB, $16$ bit result in B$,$ A$.$

divide A by B$,$ A$/$B

dest dest AND source

dest dest OR source dest XOR source

XRL destination, source dest CPLA

CINE destination, source,

relative address. crotate right A

RRA

RLA RRC A

complements the register A

compare and jump if not equal

rotate left A

RLC A

SWAP A

rotate right through carry

protate left through carry It swaps the lower nibble and the higher nibble