HP 271308 Product manual

HP 271308
EIGHT -CHANNEL MULTIPLEXER
(MUX)
HEWLETT-PACKARD COMPANY
Roseville Networks Division
8000 Foothills Boulevard
Roseville, California 95678
Technical Reference Manual
Flin- HEWLETT
.:~ PACKARD
Card Assembly: 5061-4929
Date Code: A-2318
Manual Part No.2 7132-90007
E0385
Printed in U.S.A
March 1985

PRINTING HISTORY
The Printing History below identifies the Edition of this Manual and any Updates that are
included. Periodically, update packages are distributed which contain replacement pages to
be merged into the manual, including an updated copy of this Printing History page. Also,
the update may contain write-in instructions. -
Each reprinting of this manual will incorporate all past updates; however, no new informa-
tion will be added. Thus, the reprinted copy will be identical in content to prior printings
of the same edition with its user-inserted update information. New editions of this
manual will contain new information, as well as updates.
First
Edition ................ March 1985
NOTICE
The information contained in this document is subject to change without notice.
HEWLETT-PACKARD MAKES NO WARRANTY OF ANY KIND WITH REGARD TO
THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Hewlett-Packard shall not be liable for errors contained herein or for incidental or con-
sequential damages in connection with the furnishing, performance, or use of this material.
This document contains
proprietary information which is protected by copyright. All
rights are reserved. No part of this document may be photocopied or reproduced without
the prior written consent of Hewlett-Packard Company.
Copyright (c) 1985 by HEWLETT -PACKARD COMPANY
11

CONTENTS
-------
Section I
GENERAL INFORMATION
I nt roduct ion .............................................................. 1 -1
Physical Description 1-1
Functional Description .................................................... 1-1
Eguipment
Supplied 1-3
Options Available .......................... ' ............................... 1-3
Product and Part Identification 1-3
The Product ............................................................. 1 -3
Printed Circuit Card 1-3
r1anuals ................................................................. 1-4
Specifications 1-4
SectionII
INSTALLATION
Determining Current Requirements .......................................... 2-1
Firmware
(EPROM) Installation 2-1
Jumpers
................................................................... 2-3
Memory Configuration Jumper 2-3
Signature Analysis Jumper ............................................... 2-5
lID Channel Interface 2-5
Per ipheral Device Interface ................. 0. 0 .. 00 .. 0 ... 00 ............... 2-5
Extension Cable Fabr icat ion ........... 0 .0 .0 .. o •• 00' ... o •••• 0 ... 0 .. 00 .... 02-11
Installing the MUX 2-11
Opt ional Brackets 0 ...... o. 0 ... 00 ..... 00 ................ 00 .. 0o •••••••• o ••• 2-12
Start-up 2-16
Reshipment ............................. o. 0 ............... ' ................ 2-16
Section III
PRINCIPLES OF OPERATION
Funct ional descr ipt ion ........................................... 0. 0 ...... 3-1
System Clocks 3-3
Memory Address Space ... 0. '0' ....... 0 ....... o •••••••••••••••••••••••••••• 3-3
I/O Address Space 3-6
Z-80B Microprocessor CPU 3-6
Z-80 SIO/2 (Serial lID Controller) 3-6
CTC (Counter Timer Circuit ........... 0 ........................... 0 ..... 3-19
Interfacing to the BIC 3-19
Memory Interface Circuit (MIC) 3-24
Regi ster .......... 0 ............................... 0 ... 0 ............... 0 ... 03-24
o - MIC Configuration 3-24
1 - DMA B Upper Byte of Mem Addr 3-24
2 - DMA Lower Byte of Memory Address 3-24
3 - Dt1A B Conf igura t ion. 0. 0 .... 0 ... 0. 000 .... 0 .. 0. 00 .................. 3-24
4 - Lower Byte of Trans Byt Cnt, Channel B 3-2
5 - DMA B I/O Port Address ........ 0 .... 0 ............................. 3-25
6 - DMA A Upper Byte of Memory Address .......... 0 ..... 0 ........ 0 ..... 3-25
7 - DMA A Lower Byte of Mem Addr 3-25
8 - DMA A Configuration 3-26
9 - Lower Byte of Trans Byt Cnt, Channel A ... 0 ... 0 .............. 0 ..... 3-2
A - DMA A I/O Port Address 3-26
B - Interrupt Vector ............. 0 ...................... 0 ............ 3-26
111

CONTENTS (Cont.)
Priority Interrupt Structure ........................................... 3-27
Wait State Circuits for Interrupt Ack .................................. 3-27
Diagnostic Hood for External Loop Back 3-28
Section IV
PROGRAM1ING
MUX PROGRAf'tT1ABLE FEATURES ................................................. 4-1
Transactions 4-2
Connect Logical Channel Reguest Format .................................... 4-2
Capabi lit ies 4-3
Receive Character Processing ............................................ 4-3
Receive Error Conditions 4-5
Signal Character ........................................................ 4-5
Edit Mode 4-5
Bac k space ............................................................. 4-5
Line Deletion 4-6
Software Handshake with the Device ........................... ~ .......... 4-6
Host ENQ/ACK Handshake 4-7
Device X-ON/X-OFF Handshake ........................................... 4-7
Host X-ON/X-OFF Handshake 4-8
Si ngle Text Termi nat ion ................................................. 4-8
End-On-Count Text Termination 4-8
Aler t 1 Mo de. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Type Ahead and Echoing
4-9
Receiving Transparent or Binary Data ................................... 4-10
Read Reguest Length 4-10
Host Initiated Text Termination ........................................ 4-11
Transmit Character Processing 4-11
Automatic Output Separators Appendage .................................. 4-12
Transmitting Transparent or Binary Data 4-12
Buffer Flushing 4-12
Prograrrmi ng the Receiver and Transmi tter ................................... 4-12
Parity in Transmitted or Received data 4-13
Break Detection 4-13
Handshake Timer ...................................................•...... 4-14
Additional Options 4-14
Error Handling ..................•...............................•...... 4-14
Quoting Character Mode Option 4-17
Condi tional Output Separators Appendage ................................ 4-17
Speed Sense Mode 4-17
Asynchronous Events ...................................................... 4-17
Solicited Events 4-18
Diagnostics .............................................................. 4-18
Connect Logical Channel Reguest Definitions 4-19
Read Device Data, Request Code = 1 ..................................... 4-19
Write Device Data, Reguest Code = 2 4-20
Read Card Information, Request Code = 4 ................................ 4-20
Subfunctions 0 through 33 4-20
Subfunct ion 249 -Read Data Status ................................... 4-21
Subfunction 250. Get Card RAM 4-21
Subfunction 254. Get Card Status .................................... 4-21
Write Card Configuration, Reguest Code = 5 4-22
Subfunction 0 ........................................................ 4-23
Subfunction ................................................................ 4-25
1. Configure Read Option 4-25
2. End-On-Cou nt Length .......................... ,; ................... 4-26
3. Alert 1 Read Mode 4-26
IV

CONTENTS (Cont.)
5. Transmi ss i on Mode ................................................ 4-27
6. Backspace Character 4-27
7. Line Delete Character ............................................ 4-27
8. Backspace and Other Options 4-28
9. Device Handshake Option .......................................... 4-28
10. Baud Rate 4-29
11. Character Length ................................................ 4-29
12. Number Of Stop Bits 4-30
13. Parity .......................................................... 4-30
18. Character Handshake Timer 4-31
21. Host Interrupt tv'Iask ............................................. _4-31
22. Host X-ON/X-OFF Characters 4-33
23. Device X-ON/X-OFF Characters .................................... 4-33
24. Host ENQ/ACK Characters 4-33
25. Host ENQ/ACK Pacing Counter ..................................... 4-33
27. 5i ngle Text Termi nator to Echo CR-LF ............................ 4-33
28. Output Separator ................................................ 4-33
31. Additional Options 4-34
32. 5i ngle Text Termi nator .......................................... 4-35
33. Card Write Register 4-35
34. 5et Port ID ..................................................... 4-36
Control Card, Request Code = 6 4-36
RTS and WTC Block Definitions ..................................... 0 •••••• 4-37
Event Block Description 4~38
Read Status Request Block Definitions .................................... 4-40
Identity Information Block Definitions 4-42
Defaul t MUX Configuration ................................................ 4-42
5ubfunction Assignment Summary 4-44
Read Device Data ....................................................... 4-44
Write Device Data 4-44
Read Card I nformat ion ........................................ 0 ••••••••• 4-45
Write Card Configuration 4-45
Cont rol Card ........................................................... 4-46
Section V
MAINTENANCE
Section VI
REPLACEABLE PARTS
REPLACEABLE PARTS ........................................................... 6-1
ORDERING INFORMATION 6-1
PARTS NOT IN PARTS LIST ..................................................... 6-2
Sect ion VI I
SCHEMATIC DIAGRAMS
v

GENERAL INFORMATION Ir!~IHI,
INTRODUCTION
This manual provides general information, installation, principles of operation, programming, main-
tenance' replaceable parts, and schematic diagrams for the Hewlett-'-Packard model 27130B
Eight-Channel Multiplexer (MUX). This chapter has general information about the MUX, and in-
cludes a description with specifications.
PHYSICAL DESCRIPTION
The HP 27 130B Eight -Channel Multiplexer (MUX) card is shown in Figure 2 -1. The MUX consists of
a
printed circuit card, a cable, an RS- 232 -C connection panel, a cable extender kit and an installation
manual.
FUNCTIONAL DESCRIPTION
The HP 27130B EIght-Channel Multiplexer provides multiplexed connections between a
Hewlett-Packard computer system and up to eight EIA RS-232-C, RS-423-A, RS-422-A type
devices (not including modems).
Figure
1-1 shows a Hewlett-Packard computer system using CHANNEL I/O and the MUX.
(CHANNEL I/O is a Hewlett-Packard standard defining the physical and electrical characteristics for
an I/O system consisting of an I/O channel, an I/O channel adapter, and I/O cards. The MUX is one
of the I/O cards.)
Note that the computer system CPU and memory communicate directly along a Memory/Processor
Bus (MPB). I/O data to/from peripheral devices reaches the CPU/memory through the I/O channel,
the I/O channel adapter, and an I/O card such as the MUX card. The I/O data are received from and
transmitted to peripheral devices by the I/O card, which converts device-specific data to a format
compatible with the I/O channel, and thus the computer. The I/O channel adapter (see Figure 1-1)
controls the flow of traffic between the I/O channel a·nd the memory/processor bus.
The
HP 27130B uses several of the Z-80A family of microprocessor components to relieve the host
computer of much of the overhead. This permits a wide range of configurable transmission modes and
formats, thus' allowing connections to various· CR Tterminals, printing'termina:ls,printer(-and piotters;
1-1

"HP27130B
I/O
CARD
MEMORY/PROCESSOR BUS
I/o
CHANNEL
ADAPTER
I/O
CARD
I/O CHANNEL
I/O
CARD
MUX
CARD
I/o
DEVICE
o
o
UP TO
6
o DEVICES
I/O
DE.VICE
Figure 1-1. MUX In a Typical Hewlett-Packard Computer System
1-2

HP 27130B
EQUIPMENT SUPPLIED
The standard HP 27130B Eight-Channel Multiplexer consists of the following items:
Printed Circuit Card, Part Number 5061-4929
Seventy centinleter (27.5 inch) RS-232-C Panel Cable, Part Number 28658-63001
RS-232-C Panel (connection box), Part Number 28658-60005
Extension Cable Kit, Part Number 1252-0508
EPROMs, Part Numbers 27130-80005 and 27130-80006
Installation Manual, Part Number 27130-90003
PANEL BRACKET OPTIONS AVAILABLE
The following optional RS-232-C panel mounting brackets are available with the HP 27130B.
Option 019:
Mounting Bracket, Part Number 5001-5278 (Used with for mounting RS-232-C panel in HP
19-inch rack cabinets.) NOTE: Bracket has two-panel capacity.
Option 540:
Mounting Bracket, Part Number 5001-5279 (Used for mounting RS-232-C panel on HP 9030A
and 9040A computers.)
Option 550:
Mounting Bracket, Part Number 5001-5280 (Used with HP 9000 computer, series 500, model
9050A racked in the 92211R cabinet.)
PRODUCT AND PART IDENT~FICATION
The Product
Up to five digits and a letter (27130B in this case) are used to identify Hewlett-Packard products.
The five digits identify the product; the letter indicates the revision level of the product.
Printed Circuit Card
The printed circuit card supplied with the HP 27130B product is identified by a part number marked
on the card. In addition to the part number, the card is further identified by a letter and a four-digit
1-3

HP 27130B
date code (e.g., A-230l). This designation is placed below the part number. The letter identifies the
version of the etched circuit on the card. The date code (the four digits following the letter) identifi.es
the electrical characteristics of the card with components mounted. Thus, the complete part number
on the MUX card is:
5061-4929
A-2301
If the date code stamped on the card does not agree with the date code on the title page ef this
manual,
there are differences between your card and the card described herein. These differences are
described in manual supplements available at the nearest Hewlett-Packard Sales and Service Office (a
list of Hewlett-Packard Sales and Service Offices is printed at the back of this manual).
Manuals
The Installation Manual ,supplied with the HP 27130B product, and this manual are identified by
name
and part number. (Note that this manual is part of the HP 27 132A Technical Reference
Package.)
The name, part number, and publication date are printed on the title page of each manual.
If
the manual is revised, the publication date is changed. In this manual, the "Printing History" page
(page ii) records
the reprint dates and manual update record. Reprint dates for the Installation
Manual are printed on the title page.
SPECIFICA TIONS
Table 1-1 lists the specifications of the 2713 OB MUX.
1-4