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IBM Ethernet attach

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Gary Krall

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Oct 7, 1985, 12:36:00 PM10/7/85
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ACC has recently delivered to Rutgers University (re: Messrs. Hendrick
and Marantz) a IBM to Ethernet attachment. Functionally it is the same
basic hardware as the 370/DDN interface (ie. Block Mux interface to the
channel with 68000 micro's running in a multi-processing environment)
except that it attaches directly to the LAN. For host processors
running MVS it uses the UCLA developed code set (re: Bob Braden) and
has yet to be tested for VM (which we believe should work based on
the McKay article in Signal).

The Rutgers system is a beta site and ACC will keep you aprised
as to the developments.

Let me know if you require additional information.

Regards,

Gary Krall
------

Milo Medin, NASA ARC Code EDN Advanced Systems G

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Oct 7, 1985, 1:06:37 PM10/7/85
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I'd heard about the ACC product, and it looks to be pretty fast, but I'm
concerned about the software support, especially re: block mode emulation
of remote TTY's. I believe the remote system should be the guy to do the
block mode interpretation, not the IBM machine, since the remote machine
certainly should know the screen characteristics of the terminal...

Milo

Paul Milazzo

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Oct 8, 1985, 12:53:23 PM10/8/85
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"I believe the remote system should be the guy to do the
block mode interpretation" - Milo Medin

Milo:

My modifications to 4.2bsd telnet to support 3278 emulation do exactly
that. When, during option negotiation, the client is asked for its
terminal type, it assumes the server host must be a 370 and replies
that it is an IBM-3278-x, where 'x' depends on the screen size
determined from termcap. After that it uses the curses library plus
a file containing terminal-specific key bindings to perform 3270
emulation.

My code has only been tested against the WISCNET implementation, though
after a conversation with Lou Rivas I believe it should work with the
UCLA code modulo some tweaking of the option negotiations.

Paul G. Milazzo
Dept. of Computer Science
Rice University, Houston, TX

Domain: mil...@rice.EDU
ARPA: mil...@rice.ARPA
BITNET: milazzo@rice-net, milazzo@ricecsvm
UUCP: {cbosgd,convex,cornell,hp-pcd,shell,sun,ut-sally,waltz}!rice!milazzo

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