coax protocols (was IBM hercules setup pics)

[Al Kossow]

 > no, they make cards so that IBM PC's can emulate being this type of
 > terminal.
 >
 > The chip contained on some of the cards can be use to run one of the
 > terminals, in
 > a limited fashion, but the protocol is not widely available (for the
 > wire).  The software
 > spec of what goes on is out there, and you can get some of what  
goes on
 > on the
 > wire, but the actual data protocol is not published by IBM.
 >

GA23-0061 (3274 control unit description and programmer's guide) or
something later?

 > I have a product that will capture the interchanges on the wire.

Are these all derivatives of the 3274 and its protocol?

What were the various "IRMA" cards?

I have some protocol docs in the 3274 FE manuals.