微機(jī)原理上機(jī)實(shí)驗(yàn)答案(編輯修改稿)
2025-07-23 05:33 本頁面
【文章內(nèi)容簡介】 。 SUB AL,07HNUMBER: SUB AL,30H JMP DONEERROR: MOV AL,0FFHDONE: RETASCII2HEX ENDPHEX2ASCII PROC NEAR CLC 。16進(jìn)制轉(zhuǎn)ASCII子程序 DAA ADD AL,0F0H ADC AL,40H RETHEX2ASCII ENDPDISPLAY PROC NEAR PUSH DX 。顯示結(jié)果子程序 MOV DL,AL MOV AH,2 INT 21H POP DX RETDISPLAY ENDPDISPLAY0 PROC NEAR PUSH AX 。該子程序打印輸入及: PUSH DX PUSHF MOV DL,13 MOV AH,2 INT 21H MOV DL,10 INT 21H MOV DL,[SI] 。打印輸入 INT 21H MOV DL,58 。打印: INT 21H POPF POP DX POP AX RETDISPLAY0 ENDPESCAPE PROC NEAR MOV AH,4CH 。返回操作系統(tǒng)子程序 INT 21H RETESCAPE ENDPCODE ENDSEND STT實(shí)驗(yàn)04A把BX中的“1”的個數(shù)放到AL中，并在屏幕上顯示“1”的個數(shù)。程序如下：CODE SEGMENTASSUME CS:CODESTART PROC FARSTT:PUSH DS SUB AX,AX PUSH AX。============================== CLC MOV AX,0 MOV DX,0 MOV BX,000FH MOV CX,16 CHECK: SHL BX,1 ADC DL,0 CMP DL,1 JZ COUNTCONTINUE: LOOP CHECK JMP FINISHCOUNT: ADD AL,1 DAA CLC MOV DX,0 JMP CONTINUE FINISH: MOV AH,0 MOV BX,0 MOV BL,AL 。分離AL的高4位和低4位，分離后AL中為高4位，BL中為低4位 AND AL,0F0H MOV CL,4 SHR AL,CL AND BL,0FH CALL HEX2ASCII 。調(diào)用HEX2ASCII CALL DISPLAY 。調(diào)用DISPLAY子程序 MOV AL,BL CALL HEX2ASCII CALL DISPLAY 。============================== RETSTART ENDPHEX2ASCII PROC NEAR CLC 。16進(jìn)制轉(zhuǎn)ASCII子程序 DAA ADD AL,0F0H ADC AL,40H RETHEX2ASCII ENDPDISPLAY PROC NEAR PUSH DX 。顯示結(jié)果子程序 MOV DL,AL MOV AH,2 INT 21H POP DX RETDISPLAY ENDPCODE ENDSEND STT實(shí)驗(yàn)04B，選作編寫程序在CRT上顯示圖形（圖形見實(shí)驗(yàn)冊P17）。程序如下：CODE SEGMENTASSUME CS:CODESTART PROC FARSTT:PUSH DS SUB AX,AX PUSH AX。============================== MOV BL,14H MOV BH,1 MOV CX,0AHLP: PUSH BX CALL SPACE CALL STAR CALL CRLF POP BX DEC BL ADD BH,2 LOOP LP============================== RETSTART ENDPSPACE PROC NEAR。打印空格子程序 PUSH CX MOV CX,0 MOV AH,2 MOV DL,32 MOV CL,BLLP1:INT 21H LOOP LP1 POP CX RETSPACE ENDPSTAR PROC NEAR。打印*子程序 PUSH CX MOV CX,0 MOV DL,2AH MOV AH,2 MOV CL,BHLP2:INT 21H LOOP LP2 POP CX RETSTAR ENDPCRLF PROC NEAR?；剀嚀Q行子程序 MOV DL,13 MOV AH,2 INT 21H MOV DL,10 INT 21H RETCRLF ENDPCODE ENDSEND STT實(shí)驗(yàn)04C，選作自動生成1至99BCD數(shù)并送屏幕顯示，顯示格式見實(shí)驗(yàn)冊P19。程序如下：CODE SEGMENTASSUME CS:CODESTART PROC FARSTT:PUSH DS SUB AX,AX PUSH AX。============================== MOV BL,16 MOV AL,0 CALL PRINT CALL CRLF============================== RETSTART ENDPPRINT PROC NEAR。打印數(shù)字子程序 MOV AH,2 MOV DH,1 MOV CX,10 MOV BH,30H LP2:PUSH CX MOV CX,10 MOV BL,30H LP0:CMP BH,30H JZ AA JMP BBAA: CMP BL,30H JZ CONBB: MOV DL,BH INT 21H MOV DL,BL INT 21H CALL SPACECON:INC BL LO
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