Storing and recalling screens in VT 320 emulation

Hello ppl..

I am working on supporting legacy systems and I've got a dumb terminal
which says it uses VT320 (or something VT) terminal emulation. When I
monitor the flow of data using serial spying, I find that only once
(initially) the main screens of the terminal are sent from the server
(vax/vms) and later when the particular screen is reqd., it sends some
control character to retrieve it.

The normal terminal emulation packages doesn't work with this. The
screen just jumps to corresponding position, without printing the
required screen behind.

What exactly are the specifications that are used to do this screen
recalling ?? I'm searchin the VT emulation manuals and I cudn't find
anything so far !

Any help is appreciated !!!

Regards..

Rakesh

Rakesh Peter wrote:
> Hello ppl..
>
> I am working on supporting legacy systems and I've got a dumb terminal
> which says it uses VT320 (or something VT) terminal emulation. When I
> monitor the flow of data using serial spying, I find that only once
> (initially) the main screens of the terminal are sent from the server
> (vax/vms) and later when the particular screen is reqd., it sends some
> control character to retrieve it.
>
Sounds more like some 3270-like emulation mode to me. Are those plain
VT320s? Can't remember them having something like that, and can't find
anything in the original programming manual (see
http://vt100.net/docs/vt320-uu)

Maybe if you post a short extract of the log, or at least the escape
codes suspected of calling up an stored scren?

> The normal terminal emulation packages doesn't work with this. The
> screen just jumps to corresponding position, without printing the
> required screen behind.
>
> What exactly are the specifications that are used to do this screen
> recalling ?? I'm searchin the VT emulation manuals and I cudn't find
> anything so far !
>
> Any help is appreciated !!!
>
> Regards..
>
> Rakesh
>