微机原理-虚拟仿真实验-DAC0832数模电路汇编代码

;-------------------------------------- DATA SEGMENT      MESS1 DB 'sawtooth    Q -- Next !',0DH,0AH,'$'      MESS2 DB 'triangle    Q -- Next !',0DH,0AH,'$'      MESS3 DB 'sine    Q -- End !',0DH,0AH,'$'      SINBUF DB 128,88,53,24,6,0,6,24,53,88,128,168,203,232         DB 250,255,250,232,203,168      PORT EQU 428H DATA ENDS ;-------------------------------------- STACK SEGMENT   STA DB 200 DUP(?)   TOP EQU LENGTH STA STACK ENDS ;-------------------------------------- CRLF MACRO      MOV DL,0DH  MOV AH,02H  INT 21H  MOV DL,0AH  MOV AH,02H  INT 21H  ENDM ;-------------------------------------- CODE SEGMENT ASSUME CS:CODE,DS:DATA,SS:STACK,ES:DATA START: MOV AX,DATA  MOV DS,AX   MOV AX,STACK   MOV SS,AX   MOV AX,TOP   MOV SP,AX  MOV DX,OFFSET MESS1   MOV AH,09H  INT 21H   A1:   MOV DX,PORT  MOV AL,00H   BBB: OUT DX,AL  INC DX  OUT DX,AL  DEC DX  CALL RELAY    ADD AL,10H  CMP AL,00H  JNZ BBB         MOV AH,0BH  INT 21H  XOR AL,0FFH  JNZ A1  MOV AH,01H  INT 21H  CMP AL,'Q'  JZ QQQ  CMP AL,'q'  JNZ A1    QQQ: CRLF  MOV DX,OFFSET MESS2  MOV AH,09H  INT 21H    DDD:  MOV DX,PORT   MOV AL,00H   EEE: OUT DX,AL  INC DX  OUT DX,AL  DEC DX   CALL RELAY  ADD AL,10H  CMP AL,0F0H  JNZ EEE    FFF: OUT DX,AL  INC DX  OUT DX,AL  DEC DX   CALL RELAY  SUB AL,10H  CMP AL,00H  JNZ FFF   MOV AH,0BH  INT 21H  XOR AL,0FFH  JNZ DDD  MOV AH,01H  INT 21H  CMP AL,'Q'  JZ Q2  CMP AL,'q'  JNZ DDD    Q2:   CRLF  MOV DX,OFFSET MESS3  MOV AH,09H  INT 21H   GGG:  MOV DX,PORT   HHH:  MOV SI,OFFSET SINBUF  MOV BL,20   III:  MOV AL,[SI]  OUT DX,AL  INC DX  OUT DX,AL  DEC DX         CALL RELAY  CALL RELAY  INC SI  DEC BL  JNZ III  MOV AH,0BH  INT 21H  XOR AL,0FFH  JNZ GGG  MOV AH,01H  INT 21H  CMP AL,'Q'  JZ Q3  CMP AL,'q'  JNZ GGG    Q3: MOV AX,4C00H  INT 21H  RELAY: PUSH CX  PUSH BX         MOV CX,05H WW1:    MOV BX,0300H WA1: DEC BX  JNZ WA1  DEC CX  JNZ WW1  POP BX  POP CX  RET CODE    ENDS ;--------------------------------------       END START