?CPU??????????????,CPU????????????????????????CPU???????????????,?????????????????????????????,?????????????,???????????????????????????? - PowerPoint PPT Presentation

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Title:

?CPU??????????????,CPU????????????????????????CPU???????????????,?????????????????????????????,?????????????,????????????????????????????

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Title: Author: hpeng Last modified by: PH Created Date: 4/24/2005 7:38:35 AM Document presentation format: – PowerPoint PPT presentation

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Title: ?CPU??????????????,CPU????????????????????????CPU???????????????,?????????????????????????????,?????????????,????????????????????????????

1
??? ??

?CPU??????????????,CPU????????????????????????CPU
???????????????,?????????????????????????????,????
?????????,????????????????????????????

2
9.1 ????

9.1.1 ????????????????
?????????????CPU???????????,CPU?????????????????
???,???????????????
???????CPU?,????????????????????

3
(No Transcript)
4
(No Transcript)
5
9.1 ????

9.1.2 ????

6
9.1 ????

9.1.2 ????
??????????,??????CPU?????,?????????CPU????,???????
????CPU???,?????????????,?????????????,???CPU?????
?,CPU????????????,??????????????????,?????????????
????,??????????

7
9.1 ????

9.1.3 ????
????????
?????????

8
9.1 ????

9.1.3 ????
??????,????
??????,CPU??????????????CPU????????????????,????
?CPU????????????,??????CPU???????

????1
????2
????3
9
9.2 ??????????

9.2.1 ???????????
?????????
???????
1???????????????,?????????????????CPU,??CPU???????
???
2??CPU?????????????????,?????????,?????????????

10
9.2 ??????????

9.2.1 ???????????

8255A?????1??

A??????,?????,???????A???????
???????
A??????????,???????A?????????????????
A??????????????,8255A?A??CPU????,??CPU?A???
12
(No Transcript)
13
9.2 ??????????

9.2.1 ???????????
?????????
?????????????????????????????????????????CPU,??CPU
??????????????????????????

????? ? ?
14

8255A?????1??

A??????,?????,???????A???????
???????
A??????????,???????A?????????????????
A??????????????,8255A?A??CPU????,??CPU?A???
MOV AL,00001000 ???? MOV ???,AL
MOV AL,00001001 ????? MOV ???,AL
15
9.2 ??????????

9.2.1 ???????????
CPU??????????IF
CPU?????????????????????????????
??CPU,??8086CPU,?????????????????????????????????
????,???IF?1?,CPU??????????????????????????????,??
????????,??IF???1,CPU?????????????????????????????
??????
IF?0 ??? CLI
IF?1 ??? STI

16
9.2 ??????????

9.2.2 ??????
?????????????CPU??????CPU???,????????????????????
???????????????,??????????CPU??CPU????????,???????
???????????????CPU????????,CPU??????????,?????????
???????

17
??????INTR
????
????FF
????FF
CPU??????
18
9.2 ??????????

9.2.3 ??????
????????????
??????????CPU?????
CPU??????????????????
CPU?????????????????

19
9.2 ??????????

9.2.3 ??????
??????
???????????1,???????????????????CPU?
??????
CPU??????????????3???
? ?????
? CPU?????
? CPU???????.

20
9.2 ??????????

9.2.3 ??????
??????
CPU??????????????
1? ????
2?CS?IP??FR???????
3???????????CS?,?????IP??
??CPU????,????????????????????????

push ax 1?????
push bx
sti 2????
3?????
cli 4????
pop bx 5?????
pop ax
sti 6?????????
reti

22
9.3 ???????????

????????????????CPU???????????????????????
????????,CPU????????????????????,?????????????????
?????

23
?!!!
24
9.3 ???????????

9.3.1 ?????
??????
1??????,
2???????????????????????????????

25
9.3 ???????????

9.3.1 ?????
??????

IN AL.IPORT ??????????
TEST AL,80H ?0???????
JNZ SEVO ?,?0???????
TEST AL.40H ?,?1???????
JNZ SEVl ?,?1???????
TEST AL.20H ?,?2???????
JNZ SEV2 ?,?2???????
TEST AL.10H ?,?3???????
JNZ SEV3 ?,?3???????
?????????

27
???? ???
28
9.3 ???????????

9.3.1 ?????
??????
??????INTR???????INTA??????????????????
??,???????????CPU?,?????,??????CPU?????????????CPU
?????,?????,??CPU?????????,??????????????

29
9.3 ???????????

9.3.1 ?????
??????

T
CS
30
9.3 ???????????

9.3.2 ?????
??????
?????????????,?????

31
9.3 ???????????

9.3.2 ?????
??????
1?????
????????????????????????????

32
????? IEI1, ?????
????? IEOIEI INTR
????
????
????
33
0
34
1
0
35
9.3 ???????????

9.3.2 ?????
??????
2?????
74LSl48???8?3????????,????16????????TTL??.

36
I0 I1 I7
000
37
I0 I1 I7
000
38
(No Transcript)
39
(No Transcript)
40
9.4 8086????

8086?????????????,?????????????,?????????,????
????????????????????????????,??????????????????,??
?????????????,???????CPU???INTR???NMI?????????
???????????????????????

41
(No Transcript)
42
9.4 8086????

9.4.1 ??????
????????????????CPU?????????IF?????,?8086CPU?
NMI?????NMI?????????????,????????,?CPU???????????0
2?

43
(No Transcript)
44

??????NMI????

45
9.4 8086????

9.4.2 ?????
????????????????,???????CPU?????????IF???????
??CPU???????????8086CPU?INTR??????????????????????
,CPU?????,???????4???????????????,????????????????
??,??????????????

46
(No Transcript)
47
9.4 8086????

9.4.3 ????
??????8086????????????,???????????????????

48
9.4 8086????

9.4.3 ????
??????
????????,????0?????,???????????????????,?????
??????????????????,??CPU????0???

49
9.4 8086????

9.4.3 ????
??????
??????????,??INTO??????CPU????4???,??????
??
mov al,40h
add al,40h
into

50
9.4 8086????

9.4.3 ????
???????????
(1)????
?8086CPU????????TF???1?,8086CPU????????
,??CPU??????????????l????
TF????????8??
(2)????
INT3???1????(0CCH),
?????????

51
9.4 8086????

9.4.3 ????
?????
??????????????????????? INT n (CD
21),???n?????????CPU????????INT
n?,??????????????n????
int n ?call far 4n

52
9.4 8086????

9.4.4 ????????
??????????????
1?????????CPU?????????????????????,?????????,?????
???????????
2????????????????????,??????????????????,?????????
??????????????????????????????????????????????,???
???,?????????????????????????????????????,????????
???????????,??????

53
9.4 8086????

9.4.4 ????????
??????? INT n ?????
??????INT n,??????????????????????CPU?,??CPU
???????,???????,CPU???????,?????CPU???????????????
,???????INT n??,???n??????????????????????????
?????????INT n?????,?CPU???????INT
n?????,???????????????

54
MOV AL,10 MOV BX,100 MOV BL,100 ADD
AL,BL
INT n
INT n
55
9.5 8086CPU?????

9.5.1 8086CPU??????? 8086CPU?????????????
1???????,????,INT n
2?NMl
3?INTR
4??????

56
9.5 8086CPU?????

9.5.2 8086CPU??????????

57
9.5 8086CPU?????

9.5.3 ????????
??????
CLI ???
MOV AX,0
MOV ES,AX ????????0
MOV DI, n4 ?????????DI
MOV AX,OFFSET INT_VCE ?????????????AX
CLD
STOSW ??????????
MOV AX, SEG INT_VCE ???????????AX
STOSW ???????????
STI ???

58
9.5 8086CPU?????

9.5.3 ????????
??????
INT-TBL SEGMENT AT 0 ??INT-TBL?,?????0
ORG n4 ??????
DD INTVCE ?????????
INT-TBL ENDS
????
MCODE SEGMENT ???
????
INTVCE PROC FAR ??????
IRET
INTVCE ENDP

59
8.5 8086CPU?????

8.5.3 ????????
???????
??25H?????
AL?????
DSDX????????????????
??DS??

PUSH DS
MOV DX,SEG INT60H ?????DS
MOV DS,DX
MOV DX,OFFSET INT60H ?????DX
MOV AL,60H ??????AL
MOV AH,25H
INT 21H 25H????
POP DS

61
8.5 8086CPU?????

8.5.3 ????????
???????
??????????6BH,???????????????????00lACH???????
??.???????????1000H,?????2000H?

MOV AX,,0
MOV DS,AX ?????????0
MOV AX,2000H
MOV 01ACH, AX ??????01AC???
MOV AX.1000H ???
MOV 01ACH2l, AX

63
9.6 ????????8259

??8259A?????

64
1?????
000
IR0 IR1 IR2 IR3 IR4 IR5 IR6 IR7
IR0
???????
IR1
IR2
IR3
IR4
IR5
IR6
IR7
1 1
???? ???
65
2???8259?8259??
3?????(?????) 4?????(??????????)
66
9.6 ????????8259

??8259A???????
(?)????????
1.??????
8259A?????????????????????????,IR0??????,IR1??
????,????,IR7???????

67
9.6 ????????8259

2.???????
?????????????????,??????,???????????,????????
?,??????????,??,??????,???????????????????
???????????8259A???????

68
9.6 ????????8259

3.??????
?IR0IR7???????????????
??????????
IR0gtIR1gtIR2gtIR3gtIR4gtIR5gtIR6gtIR7
??IR0????????,????
IR1gtIR2gtIR3gtIR4gtIR5gtIR6gtIR7gtIR0
??IR4????????,????
IR5gtIR6gtIR7gtIR0gtIR1gtIR2gtIR3gtIR4

69
9.6 ????????8259

4.?????????
????????????,?????????????

70
9.6 ????????8259

(?).??????
?????
??????????
????????????

71
9.6 ????????8259

(?)? 8259A?????????
???????????
??EOI??
??EOI??
??EOI??

72
000
IR0 IR1 IR2 IR3 IR4 IR5 IR6 IR7
IR0
???????
IR1
IR2
IR3
IR4
IR5
IR6
IR7
1 1
???? ???
73
9.6 ????????8259

?? 8259A??
(?)?8259A???????
ICW1??????
??????????????

???????,?? 0 0 0 1 0
0 0 1
74
9.6 ????????8259

?? 8259A??
(?)?8259A???????
ICW2??????
????????

????????080F 0 0 0 0
1 x x x
75
9.6 ????????8259

?? 8259A??
(?)?8259A???????
ICW3??????
?8259A????????

? ?
76
9.6 ????????8259

?? 8259A??
(?)?8259A???????
ICW4??????
?????????????,????????

D11???EOI,Dl0????EOI D4?SFNM????????,D41???????
??,D40??????. ?? 0 0 0 0
0 0 0 1
77
9.6 ????????8259

?? 8259A??
(?)?8259A??????
0CW1??????
??????????

1?????? 0 0
0 1 0 0 0 1
78
9.6 ????????8259

?? 8259A??
(?)?8259A??????
0CW2??????
???????????,????????

0
??????EOI?? 0
0 1 0 0 0 0 0
79
000
IR0 IR1 IR2 IR3 IR4 IR5 IR6 IR7
IR0
???????
IR1
IR2
IR3
IR4
IR5
IR6
IR7
1 1
???? ???
MOV AL,20H OUT ??(A00),AL
80
9.6 ????????8259

?? 8259A??
(?)?8259A??????
0CW3??????
???????8259A??????????????

????
81
9.7 ????

????????????
??????
???????????
??????
1????
2??????????
3???8259A???????
4????
5???????????

82
???????

INTO??
???????????,
???BL0FFH
???BL00?

INTO1 PROC ??????
PUSH AX
MOV BL,0FFH
POP AX
IRET ????
INTO1 ENDP

DATA SEGMENT ?????
ADD1 DB ?
ADD2 DB ?
DATA ENDS
CODE SEGMENT ?????
ASSUME CS CODE,DSDATA
START MOV AS,DATA
MOV DS,AX

MOV AX,0 ???????
MOV ES,AX
MOV DI,044
????????????
MOV AX,OFFSET INTO1 ??MOV AX,CS
CLD
STOSW
????????????
MOV AX,SEG INTO1
STOSW

MOV BL,0 ???
MOV AL,ADD1 ??ADD1ADD2
ADD AL,ADDD2
INTO ????,?????
MOV AL,BL
MOV AX,4C00H
INT 21H
HLT

INTO1 PROC ??????
PUSH AX
MOV BL,0FFH
POP AX
IRET ????
INTO1 ENDP
CODE ENDS
END START

88
???????

?????????,????????8255A?A???????????,??
?????????????1S??8255A?????80H-86H,8253?????88H-8E
H,?8259?????90H-96H,?8259?????98H-9EH

89
/INTA
INTR
/INTA
/INTA
INT
INT
CA0 CA1 CA2
CA0 CA1 CA2
5V
0V
SP
8259
8259
SP
IR0 IR7
IR0 IR7
5V 1KHz

OUT0 GATA0 CLK0
8255
8253
A0 A1 A7
5V
90

8255A?A??????????0???,?8253??0??????????0,????????
????
8255A??????10001011B??A??,B???,C????
8253??0??????00110001B?????????0,BCD????

8259????
1?????????
2???? ICW1?ICW2?ICW3?ICW4

?8259??
ICW1?????,??
???90H00010001B
ICW2?????,??92H08H
ICW3??????,??92H00000100B
ICW4????????,?????????
???92H00000001B

?8259??
ICW1?????,??
???98H00010001B
ICW2?????,??9AH30H
ICW3??????,??9AH00000010B
ICW4????????,?????????
???9AH00000001B

SHIFT_DAT DB 0FEH
CLI ???
CLD ?????????
MOV AX,0
MOV ES,AX
MOV DI,431H
MOV AX,OFFSET INT_31H
MOV ESDI,AX
INC DI
INC DI
MOV AX,SEG INT_31H
MOV ESDI,AX

???8259
MOV AL,11H ??ICW1
OUT 90H,AL
MOV AL,08 ??ICW2
OUT 92H,AL
MOV AL,04 ??ICW3
OUT 92H,AL
MOV AL,01 ??ICW4
OUT 92H,AL
MOV AL,01101011B ??IOW1,??IR2,IR4,IR7??
OUT 92H,AL

???8259
MOV AL,11H ??ICW1
OUT 98H,AL
MOV AL,30H ??ICW2
OUT 9AH,AL
MOV AL,02 ??ICW3
OUT 9AH,AL
MOV AL,01 ??ICW4
OUT 9AH,AL
MOV AL,00000000B ??IOW1,??IR0IR7??
OUT 9AH,AL

??8255?8253
MOV AL,10001011B ??8255A
OUT 86H,AL
MOV AL,0
OUT 80H,AL
MOV AL,00110001B ??8253??0
OUT 8EH,A
MOV AL,00
OUT 88H,AL
MOV AL,10H
OUT 88H,AL
STI ???
??????

???????
????8255?A?????,???SHIFT_DAT?????,
????8253??0,?????????????,
?8259A????EOI??,?????????

INT31H PROC FAR ???????
PUSH AX ????
PUSHF
MOV AL,SHIFT_DAT ?8255?A???
OUT 80H,AL
ROL AL,1 ??SHIFT_DAT??
MOV SHIFT_DAT,AL ???????

100

MOV AL,00110001B ????8253
OUT 8EH,AL
MOV AL,00
OUT 88H,AL
MOV AL,10H
OUT 88H,AL

101

?EOI??
MOV AL,20H ??EOI???8259
OUT 98H,AL ??8259?EOI??
OUT 90H,AL ??8259?EOI??
POPF ????
POP AX
IRET ????
INT31H ENDP

102
9.8 IBM-PC?????

9.8.1 ????
?PC/XT??,???8259A??????,???8??????PC/AT?????8
259A??????,???15?????

103
9.8 IBM-PC?????

9.8.1 ????
???
??IR0,IR1
??IR0,IR1,IR2,IR3,IR4,IR4,IR5,IR6,IR7
??IR3,IR4,IR5,IR5,IR7
?????
??00H-07H
??70H-77H

104
(No Transcript)
105
(No Transcript)
106
9.8 IBM-PC?????

9.8.2 PC????????
?????????????
??8259A????????I/O?????21H,??8?????8?????,????
?????????0??1??????????????????0????????????,???1?
?????????????(??)?
??8259A????????I/O?????A1H

107

??,???????,??????????
MOV AL,11111101B
OUT 21H,AL
????????????.?????????
IN AL,21H
AND AL,11111101B
OUT 21H,AL

108
9.8 IBM-PC?????

9.8.2 PC????????
????????
???????????,???8259A??????????????????????
??EOI,??????EOI??,????????I/O?????20H,???????????
MOV AL,20H
OUT 20H,AL
??,???????8259A?????????,??????????????
?????EOI?????8259A????????I/O?????A0H