12:05 GENERAL DESCRIPTION
A display console for system control and operator/operating system communication is required for the 4331 Processor. The 1052 Model 7 Printer-Keyboard (for System/360 processors) and 3210/3215 Console Printer-Keyboards (for System/370 processors) cannot be attached to the
4331 Processor,. A display console provides faster display than a typewriter keyboard and the console for the 4331 Processor offers functions not available for the typewriter consoles for System/360 and Systero/370.
The operator console is used to (1) manually control operation of the 4331 Processor, (2) communicate with the operating system, and (3)
perform diagnostic operations,. The cable connecting the operator
console to the 4331 Processor can be a maximum of 6 meters (20 feet) in length..
The operator console for the 4331 Processor is a 3278 Model 2A Display Console (cathode ray tube for displaying data and keyboard for entering data). The operator console is a 3278 Model 2 with certain modifications,. Specifically, the 3278 Model 2A contains an operator' s control panel that is not present on a 3278 Model 2, the function of several of its keys is altered to support console-type operations, and the last four lines of the screen cannot be used for
operator-to-operating system communication.
The 3278 Model 2A Display Console has twelve program function keys.
A light pen, such as that for the System/370 Model 158 display console, is not provided for the 3278 Model 2A Display Console. The 3278 Model 2A is also used as the operator console for the 4341 Processor but has a different keyboard and operator control panel combination. .
The audible alarm, which is sounded under program control, is standard on the 3278 Model 2A. The security keylock feature is
optional. When the security key is in the locked position, the console becomes inoperative, with the keyboard locked and the screen blank.
The screen of the opera\or console can display 25 lines of 80 characters each simultaneously. Predefined displays are provided to enable the operator to select and execute manual functions (such as resets, IPLs, address compares, etc.) that for System/360 processors are performed using a control panel on the processor,. Addi tional displays are provided for customer engineer use.
Note that if the operator console is malfunctioning during processor operation, the cable connecting it to the 4331 Processor can be
unplugged and plugged to another installed 3278 Model 2 display that is attached via the Display/printer Adapter, if one can be made available for use,. The address aSSigned to the malfunctioning 3278 Model 2A
console is retained for use with the 3278 Model 2 display. The operator will be able to continue processor operation but cannot perform any functions (such as power off) that are controlled by the operator
control panel, which is present only on a 3278 Model 2A Display Console.
OPERATOR/OPERATING SYSTEM COMMUNICATION MODES
The 4331 Processor operator console has two possible modes of operation for operator/operating system communication: display and printer-keyboard,. The display mode of operation is standard. The
Printer-Keyboard Mode optional feature can he installed to enable the operator console to operate in printer-keyboard mode to provide
emulation of 1052, 3210, and 3215 printer-keyboards,. The operator determines the mode to be used during IPL,.
Display 'Mode
'For display mode, the operator console appears to be a 3278 Model 2 display attached to a 3272 Model IB Control Unit. The keyboard is used for input and the cathode ray tube for output,. The first 20 lines of the screen are used by the operator and operating system. Optionally, the 3287 Model 1 Printer (80 characters per second) or 3287 Model 2 Printer (120 characters per second) can be attached via the
Display/printer Adapter for hard-copy output. When one or more 3287 Printers are attached to the Display/Printer Adapter, the only 3287 Printer or the 3287 Printer connected to the cable port with the lowest number is automatically assigned as the hard-copy printer during IPL.
Cable ports for devices attached to the Display/Printer Adapter are numbered 1, 2, 3, etc.
The display/keyboard combination and hard-copy printer, if present, are addressed separately when display mode is in effect. While
addresses in the range of 009 to 01F can be utilized, for compatibility with System/370processors the preferred addresses for the
display/keyboard are X'OlE' and X'009' and for the 3287 Printer, X'012' and X'·015'•• DOS/VS, DOS/VSE,' OS/VS1, and VM/370 support display mode operations. The 3287 printer is supported for hard-copy by DOS/VSE, as/VS1, and VM/370, ..
For display mode, the first 20 lines of the screen are the system area while the last 5 lines are the machine status area. The system area is used for communication between the operator and the operating system and for displays associated with manual operations performed by the operator or customer engineer. The machine status area is used to display certain status information about the processor, messages for the customer engineer, and status data regarding the Screen and keyboard.
printer-Keyboard Mode
For printer-keyboard mode, the display console appears as a 1052 Printer-Keyboard to a System/360 operating system, or as a 3210/3215 Console Printer-Keyboard to a System/370 operating system. The keyboard is used for input and the cathode ray tube and a required 3287 Model 1 or 2 Printer attached to the Display/Printer Adapter are used for
output. When printer-keyboard mode is made effective, the 3287 Printer attached to the lowest numbered cable port among those 3287 Printers attached to the Display/Printer Adapter is automatically assigned as the output printer.. Device address X· 01F" or X" 009" would normally be used for the display/keyboard,.
The message area for operator-to-operating system communication consists of lines 1 to 18 for printer-keyboard mode. Lines 19 and 20 are the operator input area that displays the data the operator keys in
(up to 126 characters),. Lines 21 to 25 are used for the same functions as when display mode is in effect.
When operating in printer-keyboard mode, the screen is treated like printer-keyboard device,. Messages appear on the screen in successive lines until the screen becomes full. Then the top six lines are delete automatically by the hardware and the remaining lines are moved up to leave six blank lines in positions 13 to 18. The operator cannot control the contents of the screen, as with display mode. Therefore, the 3287 Printer is required for hard-copy output.
In printer-keyboard mode, the 3278 Model 2A Display Console is controlled using 1052 commands. The display/keyboard and 3287 Printer have the same address and the same data is printed on the 3287 as is displayed on the screen. This mode is supported by DOS Version 3
(Release 26), DOS/VS Release 34, DOS/VSE, OS/VS1, and VM/370. The
Printer-Keyboard Mode feature must be installed when DOS Release 26 or a DOS/VS or OS/VS1 operating system that utilizes the 3210/3215 console is used with a 4331 Processor.
OPERATOR" S CONTROL PANEL
The operator" s control panel is located on the keyboard of the operator console. It contains the following pushbutton controls and indicators:
• I~L pushbutton. When this pushbutton is pressed, an IML of all required microcode for the 4331 Processor is automatically initiated. A clear reset is then performed but the time-of-day clock is not reset. After microcode loading is completed, the processor is placed in the stopped state and the program load display is shown on the operator console.
A switch on the 4331 Processor is used to turn power on in the 4331 Processor, the 5424 MFCU, and up to 24 channel-attached I/O devices with their power control switches set to remote. An IML of support processor and instruction processing function microcode occurs automatically after such a power on. The IML pushbutton need be used only if an IML is required when power is already on. THe IML that occurs automatically after a power on includes a clear reset and time-of-day clock reset.
• Power-off pushbutton. This pushbutton is used to remove power from the 4331 Processor, the 5424 MFCU, and channel-attached I/O devices with their power control switches set to remote. Note that disk and tape units attached to the 4331 Processor via the DASD Adapter and 8809 Magnetic Tape unit Adapter as well as all devices connected to the Display/printer Adapter must be powered on and off individually, using the local on/off switch contained on the unit,.
• Lamp test pushbutton. When pressed, this pushbutton causes all functional indicator bulbs on the operator's control panel and the indicator light on the 5424 MFCU (if installed) to be lit.. This button is used for testing purposes.
• Power-in-process indicator. This light turns on as soon as power is turned on via the power on switch on the 4331 Processor,. This
indicator stays on until power-on sequencing of all system
components is successfully completed, at which time i t is turned off and an IML of the 4331 Processor occurs. This light is also lit during a power-off process,.
• Power-complete indicator.. When lit, this light indicates power is on. It is turned on at the successful completion of a power-on sequence when the power-in-process indicator is turned off.
• Basic check indicator,. When this indicator is lit, a hardware malfunction exists in the power section of the 4331 Processor that requires customer engineer intervention,. This indicator is similar in function to the machine check light for System/360 processors.
• System indicator. This indicator is lit whenever instruction processing is taking place and the usage meter is running (as in System/360 and System/370 processors).
• Wait indicator. This indicator is lit when instruction execution is not occurring because the processor is awaiting the completion of an event (such as an I/O operation) to continue instruction processing
(as for System/360 and System/370 processors).
REYBOARD
Taere are 75 keys on the keyboard. Certain keys have a normal and an al ternate function,. The alternate function is selected by holding the ALTkey down and pressing the desired functional key.
In addition to alphabetic, numeric~ cursor control, and keyboard control keys, the following keys are provided:
"
• ~ODE SEL/DIAG.. This key is used to initiate use of the display screen for manual operations instead of operator-to-operating system communication.. For normal mode,- pressing the mode select key causes a mode selection display to be shown on the screen that lists the manual functions the operator can perform. THe specific mode selection display shown depends on whether system/370 or ECPS:VSE
mode is in effect. ,
-For alternate mode, the mode selection display provided for customer engineer use is shown on the screen when the mode select key is pressed,. This mode selection display indicates the manual functions the customer engineer can select for the purpose of loading and executing diagnostic programs and displaying processor indicators.
• CHG DPLY. This key causes a switch between operating system and manual modes and a switch in the display currently being shown.
That is, operating system mode is made effective and the current contents of the system message buffer are displayed if manual mode was in effect and the contents of the manual operations buffer were being displayed (or vice versa).
The two buffers are contained in control storage of the support processor and each is 80 by 25 bytes in size.. The system message buffer is used to hold the contents of lines 1 to 25 of the screen during the time the operator console is being used for operator-to-operating system comm~ication.. That is, it contains the current messages from the operating system and executing processing programs and status information.
The manual operations buffer is used to hold the contents of lines 1 to 25 of the screen. when operator or customer engineer manual
oper ations are being performed,. The contents of one of these two buffers is always displayed~
• CNCL (PA2),. When operating system mode is in effect, the current data being entered via the console iS,canceled (CNCL key would be pressed before the ENTER key). An attention interruption is generated and a special identifier character is available to
indicate the CNCL key was pressed. When manual mode is in effect, the CNCL key causes the console to return to operator/operating system communication mode and a change in the current display (from a display of the contents of the manual operations buffer to a display of the contents of the system message buffer). The manual operations buffer is cleared.
• INTR/LINE DISC,. For normal mode, this key causes an external
interruption when pressed,. For alternate mode, this key is used to terminate operation of the Remote Support Facility (see Section 50).
• ERASE EOF/SP WO.. The ERASE EOF (end-of-field) key erases the data at the cursor location and to the right of it until the end of the field is reached.. The support processor manual operations, (SP M/O) function is operative in alternate mode only.. It is used to execute certain diagnostic functions in the support processor. Actual
execution does not occur when the key is pressed unless a specific plug has been inserted in the support processor control board. This prevents accidental operator invocation of diagnostic functions that are for maintenance only or that require special hardware knowledge.
• REQ (PA1)/COMM REQ. For normal mode, when this key is pressed, an attention interruption is generated when operating system mode is active. The key is not active for manual mode. For alternate mode, this key is used to request communication between a local and remote customer engineer when the Remote Support Facility is active (see Section 50),.
• COPY.. When the key is pressed, the contents of lines 1 through 24 of the current display are written to the 3281 Printer attached via the Display/Printer Adapter that is designated as the hard-copy printer, if one is present. This key is functional only when manual mode is in effect.
• RESET. The keyboard is reset.
• Twelve program function keys,. The function that is to be executed when a program function key is pressed is installation defined .•
• Start and stop keys.. These keys are used to start instruction
processing and to stop instruction processing after execution of the current instruction, any I/O command, or any I/O command chain in progress has completed and any enabled interruptions are taken, respectively.
The above describes the operation of the keyboard for display mode operations. Operation of the keys is the same for printer-keyboard mode except that the CNCL, REQ, and twelve program function keys cannot be used by the operator during manual operations.
DISPLAY CONTROLS AND INDICATORS
Certain control switches and indicators are contained on the display console to the left and right of the screen. These include the
following:
• A power on/off switch and a power on/off indicator to control power to the display and indicate the current power condition
• A switch to cause both upper- and lowercase characters or only upper-case characters to be displayed on the screen
• A normal/test mode switch that establishes normal operating mode that is used for controlling system processing operations or a test mode that is used to execute problem determination procedures when the display console malfunctions
• An audible alarm control that is used to raise or lower the volume of the sound produced by the program-controlled audible alarm
• The screen contrast and screen brightness control knobs that permit the operator to adjust the character display for comfortable viewing
12j10 OPERATOR DISPLAYS
Several displays are provided that enable the operator to perform manual operations,. The functions the operator can perform are listed in the mode selection display. Each function has a single-character
identification associated with it. The operator selects the function to be performed by keying in the associated identification. certain
functions have their own display associated with them while others do not.
MODE SELECTION DISPLAY
The mode selection display is shown in Figure 12,.10,.1. The functions listed on this display are the same for System/370 and ECPS:VSE modes with one exception. When System/370 mode is in effect, the store status function is listed,. When ECPS: VSE mode is in effect, the machine save function is listed instead of store status. The user diskette control, diskette device address, and Communications Adapter functions appear only if the associated facility (diskette drive or Communications Adapter) is actually installed.
MODE SELECTION
P PROGRAM RESET D DISPLAY/ALTER
C CLEAR RESET L PROGRAM LOAD
S STORE STATUS or MACHINE SAVE A ADDRESS COMPARE
R RESTART K CHECK CONTROL
I INSTR STEP J INTERVAL TIMER
N RESET I-STEP M NATIVE DISPLAYS AND PRINTERS
G USER DISKETTE CONTROL
H DISKETTE DEVICE ADDRESS
Y TOD ENABLE E COMMUNICATION LINES
SELECTION
Figure 12.10,.1. The mode selection display
The functions listed on the left-hand side of the mode selection display do not have a display associated with them. Each of the functions listed on the right of the display does have an associated display,. To perform a function, the operator first must display the mode selection display on the screen by pressing the MODE SEL key on the operator console keyboard. Before the mode selection display is shown on the screen, the current contents of the screen are saved. The
current state of the processor (running or in the stopped state) is not changed when the MODE SEL key is pressed.
To perform the desired function, the operator enters its associated one-character identification .and presses the enter key. For functions that do not have a display, execution of the function occurs as soon as the enter key is pressed,. For functions that have a display, the
associated display replaces the mode selection display on the screen . when the enter key is pressed .•
The functions that have a display are those that require information from the operator in order to be executed,. If the operator knows the data that must be supplied, this data can be entered together with the one-character identification of the function. When the enter key is pressed, the associated display is shown and the function is executed.
This is called fast selection.
A validity check is performed on the identification character and any supplied data as soon as the enter key is pressed. The operator is notified if the specification is incorrect.
Note that execution of the display/alter, machine save, and store status functions require the processor to be stopped. However, the operator need not stop the processor before selecting one of these functions, as a stop occurs automatically upon selection.
FUnctions of the Mode Selection Display
The program reset function causes a reset of the instruction processing function, channels, and emulators (if any). Pending I/O interruptions are cleared and the processor is placed in the stopped state. The clear reset function causes the reset program to be performed and clears the current PSW, CPU timer, clock comparator, general registers, floating-point registers, and page descriptions in the processor storage directory to zero. In addition, control registers are initialized to their reset values. The time-of-day clock value is not altered.
The message "Reset Complete" appears on the mode selection display as soon as a program reset or clear reset function completes. The operator can select another function (such as proqram load to re-IPL the
operating system).or press the start key to resume processor operation.
The CNCL or CHG DPLY key must also be pressed to return control of the
The CNCL or CHG DPLY key must also be pressed to return control of the