Service Manuals, User Guides, Schematic Diagrams or docs for : IBM system34 fe SY31-0458-3_System_34_5340_System_Unit_Theory_Diagrams_Manual_Jul79 SY31-0458-3_Section_11_Work_Station_Attachment

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>> Download SY31-0458-3_Section_11_Work_Station_Attachment documenatation <<

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Contents
WORK STATION ATTACHMENT                        . 11-1
INTRODUCTION                                    11-1
DATA FLOW . . . .                               11-2
FUNCTIONAL UNITS                                11-3
Channel Interface .                             11-3
Controller Interface                            11-4
Serial Interface . .                            11-5
SERIAL INTERFACE TO WORK STATIONS.              11-6
Data Transmissions . . . . . . .                11-6
   Phase Encoded Data . . . . .                 11-6
   Predistorted and Distorted Data .            11-7
   Differential Data                            11-7
   Bit Synchronization . .                      11-8
   Frame Synchronization .                      11-8
   Line Turnaround                              11-8
Typical Transmission Sequences .                11-8
   Examples of Transmission Sequences           11-9
   Commands . .                                11-11
   Frame Formats . .                           11-11
OPERATIONS . . . .                             11-12
Displaying a Message                           11-13
Transmit and Receive Operations                11-14
   Transmit Operation                          11-14
   Receive Operation .                         11-15
COMMANDS . . . .                               11-16
I/O Load Command .                             11-16
I/O Control Load Command                       11-18
I/O Sense Command                              11-20
Jump on I/O Command . .                        11-22
Sense Interrupt Level Status Byte Command      11-23
ERROR CONDITIONS . . . . . .                   11-24
   Controller Storage Parity Check ,           11-25
   Controller DBO/DBI Parity Check             11-27
   Long Time-out Check . . . . .               1"-27
   Serial Parity Check . . . . . .             11-28
   Work Station Controller Check (Any Check)   11-28
   Channel DBO Parity Check.                   11-28
BASE CYCLE STEAL. .                            11-29
INPUT /OUTPUT LINES                            11-30




                                                        Contents for ,Work Station Attachment
Work Station Attachment

INTRODUCTION


In System/34, the work station attachment
controls from one to a maximum of eight work
stations. One of the work stations, a 5251
Display Station or a 5252 Dual Display Station,
is the system console and must be attached to
System/34 on port O. Then, at the customer's
option, up to seven additional work stations can
be attached to ports 1 through 3. These
additional work stations can be either 5251 or
                                                                                                                                           on Attachment
5252 Display Stations, 5256 Printers, or a
combination of them.

All work stations communicate with the                                                                                                       Work Station
attachment through a 16-bit serial data stream                                                                    Controller Card            Storage Cards
via twinaxial cables. For a description of the
data stream, see Serial Interface to Work
Stations later in this section.
                                                     CPU                      Control Field, Data, Status                                          Commands
The work station attachment circuits are located
                                                                                                                   Work Station                    and
on the A-gate, A2 board, and include the
following:
                                                   Control
                                                   Storage
                                                                                                  Controls         Adapter Card       I ./         Data

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