Sending output through a clock board port

How do I send a value through a port on the clock board?  I haven't been
able to tell which command I need to use to send a value to a particular
address.  Just in case it makes a difference, I'm using Turbo Pascal 7.0.

Thank you, in advance.

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| Yasuo Kubota, Ph.D.                        |   ykub...@matrisome.mit.edu  |
|    Dept. of Brain and Cognitive Sciences   |   ykub...@s.psych.uiuc.edu   |
|    Massachusetts Institute of Technology   |   ya...@soma.npa.uiuc.edu    |
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|  New England Revolution!  Chicago Bulls!  Chicago Cubs!  Fighting Illini! |
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