Question

DO 2 AND 3.

Question #1 Convert the following assembly program into machine code. LDAA WSA1 STAA $1000 INCA LDAB $1000 DECB ABA Here: Bra Here Question # 2 (a) in Question # 1, determine the values of PC, A, B, N, Z, V, C after each instruction (b) Verify your answers by using CodeWarrior Question # 3 Assume that the program in Question 1 is saved in memory starting at location $COOA. Drawa memory diagram showing the contents (in hex) of the memory locations in the range $COOA through $CO22

Answer 1

Q2 (a)

After LDA #$A1

# indicates immediate transfer

$ indicates data i.e A1 is in hexadecimal

In this step, hexadecimal A1i.e 161 in decimal is loaded in A

     A=A1, B = NA, N=0, Z=0, C=0,V=0

After STAA $1000

In this step, value stored in A i.e A1 is stored at location 1000

      A=A1, B = NA, N=0, Z=0, C=0,V=0

After INCA

In this step, value stored in A is incremented by 1

    A=A2, B = NA, N=0, Z=0, C=0,V=0

After LDAB #$1000

In this step, hexadecimal 1000 i.e 4096 in decimal is loaded in B

     A=A2, B = 1000, N=0, Z=0, C=0,V=0

After DECB

In this step, value stored in B is incremented by 1

    A=A2, B = 1001, N=0, Z=0, C=0,V=0

After ABA

In this step, value of A and B registers are added and the result is stored in A

    A=10A3, B = 1001, N=0, Z=0, C=0,V=0

After STAA $111111

In this step, value stored in A i.e 10A3 is stored at location 111111

A=10A3, B = 1001, N=0, Z=0, C=0,V=0

Q2(b)

answers can be easily verified by code warriors also

According to HomeworkLib policy, we are only supposed to answer one question per window