📄 电子时钟的设计.htm
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style="FONT-SIZE: 18pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">西安工业大学课程设计用纸</SPAN></U></B><B
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style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">出来。并调用屏幕</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt"><FONT
face="Times New Roman">I/O</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中断，定位光标的开始位置，结合着将时间显</SPAN><SPAN
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style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">示在我们预先定义好的位置上。由于获取了的系统时间不会自动刷</SPAN><SPAN
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style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">新，所以我们要设计成刷新的方式来不断获取系统的时间，这样就形成了会跳动的电子钟了。<SPAN
style="COLOR: #333333">调用延时</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">TIME</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">延时中断服务程序，累加到存放秒值的寄存器</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">DL</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中，并进行十进制调整。在累加的过程中，不断地对时、分、秒值进行比较，秒不能等于</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">60</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，分不能等于</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">60</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，时不能等于</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">24</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。秒等于限制值时，则使秒值为</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">0</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分值加</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">1</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；分等于限制值时，则使分值为</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">0</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时值加</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">1</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；时等于限制值时，则使时值为</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">0</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；时、分、秒值都不超过限制值时，就转显示屏输出。</SPAN><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时间显示的刷新要配合延时程序进行，为了得到良好的显示效果，延时程序要尽量接近</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt"><FONT
face="Times New Roman">1</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">秒，但又不能超过一秒，所以本程序调用了一段较精确的时间延迟程序。</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt"><FONT
face="Times New Roman">
</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">利用</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt"><FONT
face="Times New Roman">BIOSS</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计窗口，选择适当的背景和前景等，使屏幕显示更加完美。<SPAN
style="COLOR: #333333">程序一旦进入运行，就将不间断地在显示屏显示时间，要想程序停止运行，可同时在键盘按下</SPAN></SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">ESC</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">键返回</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><FONT
face="Times New Roman">DOS</FONT></SPAN><SPAN
style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">系统。</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 14pt; COLOR: #333333"><o:p></o:p></SPAN></P>
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style="FONT-SIZE: 18pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">四．程序流程图如下：</SPAN></U></B><B
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size=2>DATA
SEGMENT
；设置数据段<BR> BUF1 DB 'THE TIME IS NOW:
$'<BR> BUF5 DB ' @@@@@
^^^^^^^ @@@@@@ $'<BR>
BUF6 DB
' &&&&&&
#######
&&&&&& $'<BR> BUF7
DB ' 00 >o o < 00 $'<BR> BUF8 DB
' 00 (::) 00 $'<BR> BUF9 DB ' 00 ~~ 00
$'<BR> BUF10 DB ' 00 !! 00
$'<BR> BUF3 DB 'CLASS:040402206
$'<BR> BUF4 DB 'NAME:hu ling
wei $'<BR> BUF2 DB
10<BR> DB 10
DUP(?)<BR>
DATA ENDS<BR> STACK SEGMENT
STACK
；设置堆栈段<BR> DB
100 DUP(?)<BR>
STACK ENDS<BR> CODE
SEGMENT
；设置代码段<BR>
ASSUME
CS:CODE,DS:DATA,SS:STACK<BR> CURSOR MACRO
ROW,CLM
；设置光标位置<BR>
MOV AH,2 <BR>
MOV BH,0 <BR>
MOV DH,ROW
<BR> MOV
DL,CLM <BR> INT
10H <BR>
ENDM<BR> WIN MACRO
ROWL,CLML,ROWR,CLMR,COLOR
;设置窗口，位置，颜色<BR>
MOV AH,6 <BR>
MOV AL,0 <BR>
MOV
CH,ROWL<BR> MOV
CL,CLML<BR>
MOV
DH,ROWR<BR>
MOV
DL,CLMR<BR> MOV
BH,COLOR<BR>
INT
10H<BR> ENDM<BR>
ASCBCD MACRO
REG<BR> INC
BX<BR> INC
BX<BR> MOV
REG,[BX]<BR>
MOV CL,4<BR>
SHL REG,CL<BR>
INC BX<BR> MOV
AL,[BX]<BR>
AND AL,0FH<BR>
OR REG,AL<BR>
ENDM<BR>
BCDASC MACRO
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