Re: Re: TK Added Value Items

On 23 April 2010 08:45, halfmeg <[email protected]> wrote:

> From the discussion it seems that attaching via a 7171 isn't quite like a 2703/TTY session ( http://www.lightlink.com/mhp/2703 )

Not at all like, in fact.

> and that the ASCII-3270/3270-ASCII 'magic' would be taking place outside of MVS as Dave mentions, perhaps in Hercules emulation or a standalone application.

Yup. There's no reason someone can't write a standalone app to do this
right now; it would talk dumb ASCII on a serial port at one end, and
TN3270 at the other. And it sounds as though a Linux box with some
standard software can effectively already do this.

> From the MVS side of things it also looks like there is no 7171 device in the system generation so perhaps the '3270's it provides are genned as normal 3270s without MVS's knowledge that the attached are somewhat different.

Exactly. The 7171, like the Yale code running on S/1, presents to the
mainframe as a local, channel-attached, 3x74. It's a 3x74 with some
new features, certainly, like a pass-through mode of some sort to
allow you to control some aspects of the ASCII screen at the far end,
but it's still fundamentally a 3270 interface.

Tony H.