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<DIV><FONT size=2>Hi,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>I did use portdio.c sample code.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>I have some questions.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>I modified some parts in the code.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>that is, (as output)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>1) outp(0xf0, DDRD);-> outp(0x<STRONG>11</STRONG>,
DDRD);</FONT></DIV>
<DIV><FONT size=2> outp(0x0f, PORTD);->
outp(0x<STRONG>ff</STRONG>, PORTD);</FONT></DIV>
<DIV><FONT size=2>It is ok, I used 'reset' command as below.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>200 Welcome to portdio. Type help to get help.<BR>210
11111111<BR>210 OK<BR>210 01111111<BR>210 OK<BR>210 00111111<BR>210 OK<BR>210
00011111<BR>210 OK<BR>210 00001111 </FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>This time, I modified some parts as below.</FONT><FONT
size=2> </FONT><FONT size=2>(as input)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>outp(0xf0, DDRD);-> outp(0x<STRONG>00</STRONG>, DDRD);
<DIV><FONT size=2>outp(0x0f, PORTD);-> outp(0x<STRONG>ff</STRONG>,
PORTD);</FONT></DIV></FONT></DIV>
<DIV><FONT size=2><BR>Although I used 'reset' command, however, I failed to set
Port D bits as below.</FONT></DIV>
<DIV><FONT size=2>If Poft D is set as <STRONG>input</STRONG>, Can't I
modified port bits?</FONT></DIV>
<DIV><FONT size=2>If it is right, Can you explain to me the reason
?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>(command sequence in telnet prompt: query -> reset4
->reset3 -> reset2 -> reset1 ) </FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>200 Welcome to portdio. Type help to get help.<BR>210
11111111<BR>210 OK<BR>210 11111111<BR>210 OK<BR>210 11111111<BR>210 OK<BR>210
11011111<BR>210 OK<BR>210 11011111<BR></FONT></DIV>
<DIV><FONT size=2>sincerely yours.</FONT></DIV>
<DIV><FONT size=2> </DIV></FONT></BODY></HTML>