[vhdl-200x-ft] Update to FT12: reading of out ports

Folks,

I had an action from the 16-Nov meeting to update FT12 (see attached).

I've revised the description to specify reading an out-mode signal parameter
reads the effective value. This permits uniform treatment of signal
objects, specifically, that reading them reads the effective value.

An omission that I've corrected is that, in order for a procedure to read
the effective value of the actual signal associated with an out-mode signal
parameter, the procedure needs to be passed a reference to the signal. See
the proposed changes to 2.1.1.2.

My action item also called for me to update the proposal to allow reading of
out-mode variable parameters. However, that already appears to be in place.
Please let me know if I've overlooked something here. Thanks.

Cheers,

PA

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Dr. Peter J. Ashenden                        peter@ashenden.com.au
Ashenden Designs Pty. Ltd.                   www.ashenden.com.au
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