Why I need to delay less than a second

I have a legacy DOS application written in Basic. I need to run it under
Windows (in a DOS window). 

It needs to transfer data back and forth to the AS/400. Using Client Access
I can map a network drive on the AS/400 and have a Basic routine which
writes data to a file in a folder on the AS/400 (remember this is running in
DOS). On the AS/400 I have a program running which checks that file (using
stream file APIs) and when the PC has written data, it processes the data
and sends back a response in a different file. The PC then reads the
response from the other file. It actually works pretty well, except the
AS/400 takes a second to respond, since that is the minimum wait time. If I
don't delay the job it eats up CPU on the AS/400.

Now that I can reduce the wait time to ½ second it works fine.

Thanks for all your help.

Albert York     
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