li.asm

来自「微机原理——接口应用编程源码」· 汇编 代码 · 共 42 行

STACK SEGMENT STACK
DW 64 DUP(?)
STACK ENDS
CODE SEGMENT
ASSUME CS:CODE
START:MOV DX,63H
MOV AL,90H
 OUT DX,AL
MOV DX, 43H
MOV AL,0B6H
OUT DX,AL
D:MOV DX,60H
IN AL,DX
CMP AX, 01H
JZ A
CMP AX, 02H
JZ B
CMP AX, 04H 
JZ C
A:MOV AX,0135H
INT 10H
MOV AX, 2D69H
MOV DX, 42H
OUT DX, AL
MOV AL,AH
OUT DX,AL
JMP D
B:MOV AX, 048AH
MOV DX,42H
OUT DX,AL
MOV AL,AH
OUT DX,AL
JMP D
C:MOV AX,0074H
MOV DX,42H
OUT DX,AL
MOV AL,AH
OUT DX,AL
JMP D
CODE ENDS
END START