cmpsb.asm

介绍用Java解析网络数据的三种特殊方法

; This sample shows how
; to use CMPSB instruction
; to compare strings.

#make_COM#

; COM file is loaded at 100h
; prefix:
        ORG     100h

; set forward direction:
        CLD     

; load source into DS:SI,
; load target into ES:DI:
        MOV     AX, CS
        MOV     DS, AX
        MOV     ES, AX
        LEA     si, str1
        LEA     di, str2

; set counter to string length:
        MOV     CX, 11

; compare until equal:
        REPE    CMPSB
        JNZ     not_equal

; "Yes" - equal!
        MOV     AL, 'Y'
        MOV     AH, 0Eh
        INT     10h

        JMP     exit_here

not_equal:

; "No" - not equal!
        MOV     AL, 'N'
        MOV     AH, 0Eh
        INT     10h

exit_here:

        RET

; data:
str1 db 'Test string'
str2 db 'Test string'

END