Question

Here is the listing file for a program for the 68HC12 SOA02 SB7 $OC23 SOAOD 00000A02 OA02 SA A6 OA04 B6 0c23 BB 0A0D OA0A 86 E7 1: 2: org staa ldaa adda 3: 4: a) #SE7 1daa bra 5: loop 6: 7: OA0C 20 Fc a. I have "erased" the address of the add instruction. What is it? b. Also, notice also that I have erased the target of the branch ("loop"). Even so, you should be able to determine the target address of the Branch instruction (part of answer below). c. Assume that you have downloaded the program to the 68HC12 and are using the D-Bug12 monitor to trace (single-step) the program's execution.. Some of this activity is shown below. You are to provide the information that would be shown as you continue to type "" over and over to single step through the program. Example of Working with 68HC12 computer >md OC20 OC20 35 2A 3C 1D 31 32 33 34-35 36 37 38-3C D2 83 34 rd PC SP X Y D AB CCR SXHI NZVC 79:00 OA02 C28F 0000 C 1001 0000 PC: After typing "t", the registers will be A: After typing "t" once A: again, the registers will be: PC: After typing "t" once again, the registers will be: PC: A: After typing "t" once again, the registers will be: PC: A: once again, the registers will be: PC After typing "t" A: After typing "t" once again, the registers will be: PC: A: At this point, what is the value stored in memory location 00B7? location OC2C?

Answer 1

Adduess OngOA02 Staa B7 ldaa oc23 a dd a OAOD ldaa #E dra loop 6 A O2 O A OL 6A OT OA O A OA OC OA o7 a The addiess of add ns Huetion iS targct of boranch loop) addrss s oAoC A= Previousvalu^ 1 PC- OA02 Loc23 D APIcr typing -> Pc-0Aou, ASrer y P PC OA07, A- ip* [oaOD Aftn typing ) PC0ADA, A Ata HPg う PesOAoe, A= E7 A E E子 J PC OAOB plase Give Me ikes CS Scanew CamScanner