multi screen feature on ascii terminals (was Re: Coupla questions)

[Martin Weitzel]

In article <2241 at promark.UUCP> mark at promark.UUCP (Mark J. DeFilippis) writes:
[stuff deleted]
>.......... They do the screen retention onboard (Up to 8 per terminal on
>their 8 port board).

I don't see how this might work without the board knowing about *all*
the special escape and control sequences, of *any* terminal *ever*
connected to this port. Can you - or anybody else - explain?