pc = 0x00800000

          lw R1 R0 data1       *R1=M(data1)=0x00000001
          lw R2 R0 data2       *R2=M(data2)=0x01234567
          lw R3 R0 data3       *R3=M(data3)=0xfedcba98

          sw R1 R0 adr1        *M(adr1)=R1
          sw R2 R0 adr2        *M(adr2)=R2
          sw R3 R0 adr3        *M(adr3)=R3

          sw R3 R0 adr1        *M(adr1)=R3
          sw R2 R0 adr2        *M(adr1)=R2
          sw R1 R0 adr3        *M(adr1)=R1

          dc 0x00000000        *HALT instruction

adr1: ds 1
adr2: ds 1
adr3: ds 1


data1: dc 0x00000001
data2: dc 0x01234567
data3: dc 0xfedcba98