Consider the following example program that uses labels. You will perform two-pa

Question

Consider the following example program that uses labels. You will perform two-pass assembly to produce a list file, with machine code to left and source code to the right. Determine if the beq instruction will branch or not. Explain your answer Write what the list file looks like after you completed the first pass Give the symbol table, that is, list the labels and address value assigned to each Write the final list file. Write after each instruction write the addressing mode and effective address, but for branch instructions write the target address

Explanation / Answer

in the programme the first ORG $4000

thats is byte at location 4000 so no code generate after this ORG $4000 that is set origin

start addressing in 003b

send data byte x

beq instruction to loop back becuase bit is not set

change the value

commnads DC.B

that allocate byte for storage intialize values $c4

byte allocaton to set origin FFFE system reset(RESET)

and the define the exect location and word and start

1)in this strat porsition 003b after that the bit is not set and also the reslut back is in zero

ORG $4000

start ldaa $3b    move data 003b

anda RomAdx when and operation done

get the result is zero

beq done beacuse

two registers are equal

list      adress    object   label opcode operand   comments

0000 DATA     EQu $0000         sratrt DATA

4000 proram EQu   $4000 start program

fffe   RESET   EQU   $FFFE RESET VECTOR

c4                                           Regiter base

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