s4.asm

基于９６单片机的串口通讯程序

CODE    SEGMENT    ;S4.ASM,BCD-BCD=?
	ASSUME CS:CODE
	ORG 2D80H	;this is a program of bcd sbb,40-12=?
START:	MOV AH,00H	;result in [4100]=28
	SAHF
	MOV CX,0002
	MOV SI,4000H
	MOV DI,4100H
	MOV [SI],0400H
	MOV [SI+2],0102H
CON1:	MOV AL,[SI]
	SBB AL,[SI+2]
	DAS
	PUSHF
	AND AL,0FH
	POPF
	MOV [DI],AL
	INC DI
	INC SI
	LOOP CON1
	JMP $
CODE    ENDS
        END  START