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<DIV><FONT size=2 face=Arial>Thanks all for the comments on comm ports. I'm
having no problems with ports on Linux but a friend using Windows XP had a
problem that started the questions. </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>We've concluded that USB to comm adaptors cannot be
used on Windows XP. The interrupt involved is shared with other services and may
be the reason it has not worked. We do not know of a way to force the interrupt
to an unused number.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Second, we found that a four port comm board also
uses sharred interrupts and even though we can force the interrupt to an unused
number, it still did not work. Only single or double port cards have worked for
us.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>This is the Windows or DOS attach statement for
com1</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>attach asy 0x3f8 4 ax25 vhf 2048 256
9600</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Com1 through com4 using interrupts 3 and 4 with the
associated software addresses are the only commands that worked for us. We have
gone to a single port comm board and all is working fine. Again, this is Windows
XP. Linux is much easier.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Thanks for all the comments.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Jerry, N0MR</FONT></DIV></BODY></HTML>