幻灯片 1

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6 [ ] MOV AX, 3064H AX=3064H 16AX OP 64H 30H

7 AX BX CX DX SI DI SP BP 8 AH AL BH BL CH CL DH DL MOV AX, BX AX=30AAH, BX=7255H AX=7255H, BX=7255H

8 EA

9 EA

10 MOV AX, [2000H] DS=3000H = =32000H AX=7850H (32000H)=50H (32001H)=30H AX=3050H (32000H)=50H (32001H)=30H DS=3000H AH AX AL DS 30000H 32000H 32001H

11 MOV AX, ES:[2000] MOV AX, SS:VALUE ES=4000H, = =42000H 42000H AL 42001H AH VALUEEQU SS=8000H VALUE=178EH EH=8178EH

12 DSEG SEGMENT DATA DB10 DUP(?) DSEG ENDS CSEG SEGMENT ASSUME CS:CSEG, DS:DSEG START: MOV AX, DSEG MOV DS, AX MOV AL, 01H MOV DATA, AL MOV DL, DATA

13 MOV AX, DSEG MOV DL, DATA DSEG DATA Disp

14 BX BPSI DI BX SI DI =16 DS+BX =16*DS+SI =16 DS+DI BP SS =16 SS+BP

15 MOV AX, SS:[BX] MOV AX, [BX] MOV AX, SS:[BX] =16 SS+BX MOV AX,[BX] =16 DS+BX SS=5A00H, BX=2800H 5C800H() 5C801H()

16 AH AX AL SS 5A000H 5C800H 5C801H

17 displacement EA= BX BP SI DI

18 BX SI DIDSBP SS : BX =16 DS+ SI + DI 8 16 EA =16 SS+BP+ 8 16

19 MOV DL, ES:STRING [DI] STRING EQU STRING EQU 3FFEH EA=STRING+DI ES =16 ES+STRING+DI

20 BX DS BP SS =16 DS+BX+SI =16 DS+BX+DI =16 SS+BP+SI =16 SS+BP+DI EA

21 MOV AX, [BX] [DI] MOV AX, [BX+DI] DS=3000H, BX=6780H DI=0041H EA=6780H+0041H = C1H=367C1H AX=8957H (367C1H)=34H (367C2H)=12H AX=1234H (367C1H)=34H (367C2H)=12H AH AX AL DS 30000H C1H 367C2H DS=3000H BX+DI=67C1H 21

22 BX DS BPSS =16 DS+BX + SI + DI =16 SS+BP + SI + DI

23 EA

24 MOV AX MASK [BX] [SI] MOV AX MASK [BX+SI] MOV AX [MASK+BX+SI] DS=5000H BX=1C7AH SI=0135H MASK=0200H = C7AH =51FAFH AX=765AH (51FAFH)=78H (51FB0H)=56H AX=5678H (51FAFH)=78H (51FB0H)=56H BP

25 MOV AX MASK [BX] [SI] MOV AX MASK [BX+SI] MOV AX [MASK+BX+SI] MOV AX [BX+SI]+MASK BX+DI+MASK AX AH AL DS 30000H FAFH 51FB0H

26 DAA ALAL I/O 8 16DX

27 ~

28 OP6 2 W=1 W=0 D=1 REG D=0 REG D W

29 SW=00 SW=11 16 SW= S W

31 REG MODR/M MOD=11 MOD=00 MOD=01 MOD=10

32 ) ) 000 AX AL 011 BX BL 001 CX CL 010 DX DL 100 SP AH 111 DI BH 101 BP CH 110 SI DH

33 MOD R/M W=0 W= [BX]+[SI] [BX]+[SI]+D8 [BX]+[SI]+D16 AL AX [BX]+[DI] [BX]+[DI]+D8 [BX]+[DI]+D16 CL CX [BP]+[SI] [BP]+[SI]+D8 [BP]+[SI]+D16 DL DX [BP]+[DI] [BP]+[DI]+D8 [BP]+[DI]+D16 BL BX [SI] [SI]+D8 [SI]+D16 AH SP [DI] [DI]+D8 [DI]+D16 CH BP D16 [BP]+D8 [BP]+D16 DH SI [BX] [BX]+D8 [BX]+D16 BH DI

34 SEG CS DS ES SS

40 ,

41 CS,DS,ES,SS AX BX CX DX AH AL BH BL SI DI SP BP CH CL DH Dl

42 MOV MOV DST, SRC AX AX MOV

43 CPU MOV AL, BL MOV DL, CH MOV AX, DX MOV CX, BX CPU MOV CL, 4 MOV AX, 0FFA0H MOV SI, 057BH

44 CPU MOV BYTE PTR MEM, 20H MOV WORD PTR [BX], 0A234H MOV AL, BUFFER MOV AX, [SI] MOV [DI], CX MOV SI, BLOCK[BP] MOV DS, DATA[SI+BX] MOV DEST[BP+DI], ES

45 PUSH PUSH SRC (SP) (SP) 2 ((SP)+1, (SP)) (SRC) POP POP DST (DST) ((SP)+1, (SP)) (SP) (SP)+2

46 XCHG XCHG OPR1,OPR2 (OPR1) (OPR2)

47 AX AL IN(Input) OUT(Output) XLAT(Translate)

48 IN(Input) IN AL PORT IN AX PORT PORT 00H FFH256 FFH PORT AL AL (PORT) PORT PORT+1 (1 )AX AX (PORT+1) (PORT)

49 OUT(Output) OUT PORT AL OUT PORT AX PORT IN AL PORT (PORT) AL AX PORT PORT+1 ( ) (PORT+1) (PORT) AX

50 IN IN AL DX IN AX DX DX 0000H FFFFH DX AL AL (DX) DX AX AX (DX+1) (DX) DX

51 OUT OUT DX AL OUT DX AX ALDX (DX) AL AX DX DX+1 (DX+1) (DX) AX DX

52 MOV DX 07A8H OUT DX AL AL 07A8 OUTDX=07A8H (07A8H)=85H AL C6H OUTDX=07A8H (07A8H)=C6H AL C6H 3-9 IN AX, 28H 28 AL MOV DATA-WORD, AX 28AX DATA-WORD 3-10 MOV DX 3FCH IN AL DX 03FCHAX 3-11 OUT 5 AL AL 5

53 XLAT XLAT OPR XLAT (AL) ((BX) +(AL)) ASCII0~9 7

54 XLAT XLAT BX 8 AL XLAT XLAT

55 (BX) =0040H (AL)=0FH (DS)=F000H XLAT F004FH AL: (AL)=2CH XLAT AL 2CH

56 F0040H F004FH

57 XLAT XLAT-3 TABLE DATA SEGMENT ; TABLE DB 0,1,2,3,4,5,6,7,8,9 ; TABLE0 9 DATA ENDS CODE SEGMENT ; MOV BX, OFFSET TABLE ; BX MOV AL, 4 ;4 AL XLAT ;16 AL CODE ENDS Table

58 LEA(Load Effective Address) LDS(Load Ds with pointer) DS LES(Load Es with pointer) ES

59 LEA LEA REG, SRC SRCREG 16 LEA BX BUFR BUFR BX BX=508AH BUFR =7865H EA=7865H BX=7865H BUFR =7865H

60 LEA SP, [BX] LEA SP, [BX] MOV SP, [BX] BX SP BX SP BX=1234H DS=2000H

61 BX SP 1234 DS DS BX BX SP (1) LEA SP[BX] (2) MOV SP[BX]

62 LDS LDS REG, SRC (4Bytes) DS 16 LDS SI [BX] BX32 DSSI

63 LDS BX ADDR[SI] DS=2000H SI=1000H ADDR=0020H =21020H BX= 6D51H BX=1080H DS=4000H

64 DS ADDR[SI] BX 6D DS (1) LDS BX, ADDR[SI]

65 DS ADDR[SI] BX DS DS

66 LES LES REG, SRC (4Bytes) ES 16 LES DI [2180] H 2181 H DI 2182 H 2183 HES LESLDS ESDS

67 (1)LAHF (Load AH with Flags) AH LAHF (AH) (PSW ) (2)SAHF (Store AH into Flags) AH SAHF (PSW ) (AH) (3)PUSHF (Push the Flags) PUSHF (SP) (SP)-2 ((SP)+1 (SP)) (PSW) (4)POPF (POP the Flags) POPF (PSW) ((SP)+1 (SP)) (SP) (SP)+2

70 ????? BX BP SI DI??

71 ???? XCHG CS AX MOV [BX] [1000] XCHG BX IP PUSH CS POP CS

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untitled 8086/8088 CIP /. 2004.8 ISBN 7-03-014239-X.... TP313 CIP 2004 086019 16 100717 http://www.sciencep.com * 2004 8 2004 8 1 5 500 787 1092 1/16 16 1/2 391 000 1 2 ii 1 2 CAI CAI 3 To the teacher To the student