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HP12792B Schematic ( PDF Datasheet ) - HP

Teilenummer HP12792B
Beschreibung (HP12792B/C) 8-Channel Asynchronous Multiplexer Subsystem
Hersteller HP
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Gesamt 30 Seiten
HP12792B Datasheet, Funktion
HP 12792B/C 8ĆChannel Asynchronous
Multiplexer Subsystem
Configuration Guide
Manual Part No. 5955Ć8868
E0693
Software Technology Division
11000 Wolfe Road
Cupertino, CA 95014Ć9804
Printed in U.S.A. June 1993
Second Edition
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HP12792B Datasheet, Funktion
Overview
The purpose of this Configuration Guide is to give the System Manager specific instructions for
generating the HP 12792B/C Multiplexer (MUX) into an RTEĆIVB or RTEĆ6/VM system. Also
included are instructions on initializing the devices attached to the multiplexer and on
troubleshooting if problems arise upon installation.
For more details on the operation of the HP 12792B/C Multiplexer, refer to the HP 12792B/C
8ĆChannel Asynchronous Multiplexer Users Manual, part number 5955Ć8867 and the HP 12792B
8ĆChannel Asynchronous Multiplexer Subsystem Installation and Reference Manual, part number
12792Ć90020.
For configuration and user information on the HP 12792C MUX using the Revision D firmware,
refer to the RTEĆ6/VM Serial Driver Reference Manual, part number 92084Ć90050. The Revision D
MUX firmware is an option to the HP 12792C.
Overview 1Ć1
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HP12792B pdf, datenblatt
System Generation
The following paragraphs outline the recommended procedure for generating the HP 12792B/C
Multiplexer into an RTE Operating System. Examples of input at each of the relevant phases is
shown. An example listing of the relevant generation phases is shown in Appendix A.
General Considerations
The generation of the HP 12792B/C multiplexer driver software into RTE is very similar to that of
other terminal drivers. Each multiplexer card may be assigned up to eight EQTs (one EQT per
port). Each EQT to be used with this driver is assigned to an interface card at generation time by
the select code designated when EQTs are specified. Any EQT associated with a particular
interface card can be used for any port on that card, but EQTs cannot be moved from one card to
another after generation.
The size of an extent assigned to an EQT is determined by adding the size required by the
interface driver (27 words) to the largest of the extents required by any device drivers attached to
that EQT. The HPĆsupplied device drivers both require fourĆword extents, so when using only
HPĆsupplied software the extent size would be 27 + 4 = 31 words.
A Device Reference Table (DRT) entry must be generated for each logical unit (LU) to be used.
A different LU number must be assigned to each individual terminal or device, including
subchannels if DDV05 is used.
On system boot, the WELCOM file should contain control requests needed to initialize the ports.
It is at this time that the association between LU (and its EQT) and physical port (device) is made.
The WELCOM file contents are covered in Chapter 4 (Initialization).
In the following examples the step numbers referred to in each phase refer to the steps in Section
2 of the RTEĆIVB or RTEĆ6/VM Online Generator Reference Manual, part numbers 92068Ć90007
and 92084Ć90010, respectively.
System Generation 3Ć1
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