IBM SY31-0458-3 Section 11 Work Station Attachment free download

File name SY31-0458-3_Section_11_Work_Station_Attachment.pdf

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 attachme