a7-2.asm

汇编语言的设计

STACK SEGMENT STACK
	DW 64 DUP(?)
STACK ENDS

CODE SEGMENT
	ASSUME CS:CODE

START:	MOV AX,3010H
	PUSH AX
	MOV SI,3000H
	MOV AX,[SI]
	PUSH AX
	MOV DI,0000H
	CALL branch
	INT 03H

branch:	PUSH BP
	MOV BP,SP
	PUSH BX
	PUSH AX
	MOV BX,[BP+DI+06H]
	MOV AX,[BP+DI+04H]
	CMP AX,0000H
	JZ A1
	PUSH BX
	DEC AX
	PUSH AX
	CALL branch
	MOV BX,[BP+DI+06H]
	MOV AX,[BX]
	PUSH BX
	MOV BX,[BP+DI+04H]
	MUL BX
	POP BX
	JMP A2
A1:	MOV AX,0001H
A2:	MOV [BX],AX
	POP AX
	POP BX	 
	POP BP
	RET 0004H
CODE ENDS
     END START