Browse Prior Art Database

Terminal Control Unit Adapter for Migration to Co-operative Processing

IP.com Disclosure Number: IPCOM000119252D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 77K

Publishing Venue

IBM

Related People

Ouchi, NK: AUTHOR

Abstract

A preferred system evolution leads to cooperative processing between IBM System/370* (S/370) central processors and intelligent terminals. The large number of terminals without a processor, 327x type, impedes the progress of customers to this new system architecture. Many establishments have a large investment in cables in the building walls and do not want to re-cable. The disclosed adapter provides a means by which the 327x terminals can migrate to cooperative processing and permit an evolutionary growth path for a system complex.

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Terminal Control Unit Adapter for Migration to Co-operative Processing

      A preferred system evolution leads to cooperative
processing between IBM System/370* (S/370) central processors and
intelligent terminals.  The large number of terminals without a
processor, 327x type, impedes the progress of customers to this new
system architecture.  Many establishments have a large investment in
cables in the building walls and do not want to re-cable.  The
disclosed adapter provides a means by which the 327x terminals can
migrate to cooperative processing and permit an evolutionary growth
path for a system complex.

      Disclosed is a terminal control unit built on a PS/2* family
processor with specialized adapters for attaching 327x terminals and
PS/2 processors using existing coax for transmission.  The PS/2s are
attached using the NETBIOS or APPC/LU6.2 protocol and the 327x are
attached using the internal CU to terminal protocols, 327x data
stream. The adapter attaches to the PS/2 MICRO CHANNEL* and appears
as a Token Ring to the internal software for attachment of PS/2 or as
a keyboard and a display for attaching 327x.

      The PS/2 in the control unit runs OS/2* and a process for each
327x.  In the most primitive mode, the 327x process executes a
terminal emulation program and the 327x appears as a S/370 attached
terminal.  The terminal can also "hot key" to a PS/2 session and
execute PS/2 programs.  The files are on the S/370 or on the CU if
the customer selects it to be a file server.  The 327x would be a
"diskless" PS/2.  In both of these modes, the emulation program
communicates to the S/370 complex as an APPC LU6.2 Peer and not as a
channel-attached slave control unit.  The channel cables are the
same, but the protocol is that of a 3088 channel-to-channel unit
rather than a control unit. NetView* and Netview PC are used for load
a...