[GreenKeys] Ignoring DC4/DC2 codes on M33

[Tom Watson]

<<<deletia>>>
I had a 33 ASR that had this feature.  When I wanted to punch a binary tape, I looked for the DC4 code (Control-T) and immediately sent out a DC2 code (Control-R).  The DC2 code doesn't get punched, but it turns on the punch.  The DC4 code (that turns off the punch) DOES get punched.   It is a pretty simple program to do.
The actual DC2/DC4 mechanism connects to the punch mechanism and has a couple of metal tabs  that when installed turn the feature off.  I don't know the exact details they may be available in some manual available online.  This is from memory of over 40 years ago.  I had an ASR33 that had this feature and the reader control feature (DC1(xon) DC3 (xoff)).
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