汇编实验期末考试代码及相关注释.doc

;说明：程序主要有两个模块构成，图形显示程序，和发声程序组成。 DSEG SEGMENT TABL DW 524 DW 588 DW 660 DW 698 DW 784 DW 880 DW 988 DW 1048；发声频率 ROWDW0；初始行 COLDW0；初始列 COLORDB3 ；初始的颜色 DSEG ENDS CSEG SEGMENT ASSUME CS:CSEG,DS:DSEG MAIN PROC FAR START: MOV AX,DSEG MOV DS,AX ；初始化程序 MOVAH,15；数INT10H ；取当前的显示方式为页号，为字符的列数，al为行数;PUSHAXMOVAX,0004HINT10HMOVAH,0BHMOVBH,01HMOVBL,01HINT10H；置彩色调色板MOVCX,8；显示8个键 a:call draw；调用画图函数ADDCOL,25；设置键的位置LOOPa ；循环画出八个键 mov col,0 ；置列数为0 NEW_NOTE: MOV AH,07 INT 21H；从键盘读一个字符到 CMP AL,0DH ;回车退出 JE EXIT1 jmp m；接着后续执行 EXIT1: MOV AX,4C00H INT 21H m: mov color,3 call draw；调用画图函数使键能恢复为原来的颜色 MOV BX,OFFSET TABL；bx存进table的偏移地址 CMP AL,1 JB NEW_NOTE CMP AL,8 JA NEW_NOTE；如果不是1到8 重新输入 cmp al,31h je p1；如果是1，跳转 cmp al,32h je p2 cmp al,33h je p3 cmp al,34h je p4 cmp al,35h je p5 cmp al,36h je p6 cmp al,37h je p7 cmp al,38h je p8 p1: mov COL,0 mov color,2 call draw jmp l ；将第1个键显示为红色，跳转到l,l为发出对应的声音 p2:mov COL,25 mov color,2 call draw jmp l p3: mov col,50 mov color,2 call draw jmp l p4: mov col,75 mov color,2 call draw jmp l p5: mov col,100 mov color,2 call draw jmp l p6: mov col,125 mov color,2 call draw jmp l p7: mov col,150 mov color,2 call draw jmp l p8: mov col,175 mov color,2 call draw jmp l l: AND AX,0FH ;取ax的低四位 SHL AX,1；左移一位 SUB AX,2；减二，为了将，ascll码转成数组中位置，因为table中是字 MOV SI,AX MOV DI,BXSI；将数组的第si个元素放到di MOV BX,10 CALL SOUNDF call wait1;延时 jmp stop；输入下一个字符发声 EXIT: MOV AX,4C00H INT 21H STOP: MOV AL,0FDH OUT 61H,AL；关闭扬声器 JMP NEW_NOTE MAIN ENDP draw proc near 1:PUSHAXPUSHCXPUSHDXPUSHSIPUSHDIMOVAH,0CHMOVAL,COLORMOVDI,100MOVDX,ROW1:MOVSI,20MOVCX,COL2:INT10H；调用0C功能写像素，dx,cx,为像素的起始坐标，si控制像素的列，di控制像素的行INCCXDECSIJNZ2INCDXDECDIJNZ1POPDIPOPSIPOPDXPOPCXPOPAX ret draw endp SOUNDF PROC NEAR MOV AL,0B6H OUT 43,AL；初始化定时器 MOV DX,12H MOV AX,348CH DIV DI；中为声音的频率 OUT 42H,AL MOV AL,AH OUT 42H,AL；建立产生声音的频率 IN AL,61H MOV AH,AL；ah中保存当前端口的状态 OR AL,3 OUT 61H,AL；打开扬声器发出声音 WAIT1: MOV CX,2800 ;延迟时间音长10ms CALL WAITF SOUNDF ENDP WAITF PROC NEAR PUSH AX WAITF1: IN AL,61H AND AL,10H；得低四位的值 CMP AL,