IBM-PC assembly language programming (second edition) after-school exercises answer (Tsinghua University Press) (Shen meiming, Wen dongchan) Chapter 4

. An error occurred while executing the following commands: (1) mov ah, the source operand of BX is different from the destination operand. (2) mov [BX], [Si]: Two memory units are transmitting data, which is not allowed in assembly languages. (3) mov ax, [Si] [di] cannot be used with two address changes, one of which should be the base address (4) mov mydat [BX] [Si], ES: Same as ax (2) (5) mov byte PTR [BX], 1000 must have a register (6) mov BX, offset mydat [Si] offset cannot be connected to complex operands (7) mov CS and ax cannot assign values to CS (8) mov ECx and ax operations have different types. 2. (1) Illegal (2) Illegal (3) Illegal (4) Illegal 3. (1) the operand type is invalid. (2) Valid (3) Illegal. Two memory units are not allowed to transmit data directly. Where did you put the CPU? (4) Valid (5) Valid (6) Legal (7) An invalid register must exist ~~ Where did I put the CPU? (8) invalid. Adding two memory unit addresses makes no sense. (9) Valid (10) Illegal, same as (3) 4. (1) Two memory units transmit data (2) Different operand types (3) The jump command can only jump to the symbolic address (4) The transfer instruction cannot be a variable but a label. (5) The format is incorrect. It should be near PTR. 5. No more images 6. (1) DW 5150 H (2) mov ax, 5150 H MoV address, ax And write a few. 7. Datasg segment Fld1b dB 'Personal' computer' Fld2b dB 10 DUP (32) Fld3b dB 20 h Fld4b dB 01011001b Fld5b dB '123' Fld6b dB 10 DUP (0) Fld7b dB 'part1', DUP 20 (?), 'Part2', DUP 50 (?), 'Part3', DUP 14 (?) Fld1w DW 0fff0h Fld2w DW 01011001b Fld3w DW fld7b Fld4w DW 5, 6, 7, 8, 9 Fld5w DW 5 DUP (0) Fld6w DW (FLD6W-FLD1W)-(FLD7B-FLD1B) 8. The plenth value is 22, and GE indicates the length of the Data Segment. 9. The value of L is 6. 10. (1) mov ax, offset lname (2) mov Si, word PTR code_list (3) code_lenght equ $-code_list 11. The Code is as follows: Data_seg segment DB 5 Data_list DW 0 ffffh, 5 DUP (?) Data_seg ends Code_seg segment Assume Cs: code_seg, DS: data_seg MoV ax, 5 MoV Max, ax MoV ax, 0 ffffh MoV min, ax Code_seg ends 12. (1) 10025 (2) 19 (3) 2548 (4) 3 (5) 103 (6) 0 ffffh (7) 1 (8) 3 13. Compiled: MoV ax, 0ah MoV BL, 0ah MoV Cl, 1 14. (1) (ax) = 1 (2) (ax) = 2 (3) (CX) = 14 h (4) (dx) = 32 h (5) (CX) = 1] 15. (1) operator error changed to: data_seg segment (2) A section name is missing. (3) The reference should start from; and change the "/" to ";" (4) The structure is changed: Main_proc proc far .... Main_proc endp End 16. The program framework is as follows: Data_seg segment Org 0e000h First_type equ this word Data_group dB 100 DUP (?) Data_seg ends Stack_seg segment Align 16 Stack dB 100 DUP (?) Stack_seg ends Code_seg segment Assume Cs: code_seg, DS: data_seg, SS: stack_seg Org 1000 h Start: mov ax, data_seg MoV ds, ax MoV ax, stack_seg MoV SS, ax ....... Code_seg ends End start 17. The procedure is as follows: D_seg segment Augend dd 99251 D_seg ends E_seg segment Added DD-15926 E_seg ends C_seg segment Assume Cs: c_seg, DS: d_seg, ES: e_seg Start: mov ax, d_seg MoV ds, ax MoV ax, e_seg MoV es, ax MoV eax, DS: augend Add eax, ES: addend MoV DS: Sum, eax C_seg ends End start 18. 19. PTR pseudo operations must be added: (2) (3) (4)