分类： WINDOWS
2007-10-23 16:29:23
|
6.2.5 |
用代码流传递参数 |
由位于CALL指令之后的代码流（Code Stream）传递参数。
|
DESG SEGMENT |
||
|
COUNT |
DW 5 |
;DW：1个字，即16bit或两个字节 |
|
ARRAY |
DW 8,-1,32766,0,100 |
;32766=7FFEH |
|
MAX |
DW ? |
|
|
DESG ENDS |
||
|
SSEG SEGMENT STACK |
||
|
DW 128 DUP(?) |
||
|
SSEG ENDS |
||
|
CSEG1 SEGMENT |
||
|
ASSUME CS:CSEG1,DS:DSEG,SS:SSEG | ||
|
START: |
||
|
MOV AX,DSEG |
||
|
MOV DS,AX |
||
|
CALL FINDMAX |
||
|
DD COUNT,ARRAY,MAX |
||
|
MOV AH,4CH |
||
|
INT 21H |
||
|
CSEG1 ENDS |
||
|
CSEG2 SEGMENT |
||
|
ASSUME CS:CSEG2,SS:SSEG | ||
|
FINDMAX PROC FAR |
||
|
MINSW |
=8000H |
;16位带符号数的最小值 |
|
PUSH BP |
||
|
MOV BP,SP |
||
|
PUSH AX |
||
|
PUSH BX |
||
|
PUSH CX |
||
|
PUSH SI |
||
|
PUSH DS |
||
|
PUSH ES |
||
|
LDS BX,2[BP] |
;装入返回地址到DS：BX | |
|
LES SI,[BX] |
;取元素个数所在地址到ES：SI | |
|
MOV CX,ES:[SI] |
;取得元素个数 | |
|
LES SI,4[BX] |
;取得数组首地址 | |
|
MOV AX,MINSW |
||
|
NEXT: |
CMP AX,ES:[SI] |
|
|
JG SKIP |
||
|
MOV AX,ES:[SI] |
||
|
SKIP: |
ADD SI,2 |
|
|
LOOP NEXT |
||
|
LES SI,8[BX] |
;取得存放最大值的地址 | |
|
MOV ES:[SI],AX |
||
|
ADD BX,12 |
;代码流有12个字节 | |
|
MOV 2[BP],BX |
;修改返回地址 | |
|
POP ES |
||
|
POP DS |
||
|
POP SI |
||
|
POP CX |
||
|
POP BX |
||
|
POP AX |
||
|
POP BP |
||
|
RET |
||
|
FINDMAX ENDP |
||
|
CSEG2 ENDS |
||
|
END START |
||
