A cathode-ray tube (CRT) display station used in clusters with the 3274, the 3276, the 4701 Controller, the 4321 Processor or the 4331 Processor with Display Printer Adapter or the 4361 Processor with Display Printer Adapter and Workstation Adapter, for displaying alphanumeric data, and for entering data into and retrieving data from S/360, S/370, a 4300 Processor, 8100 System or 9370 Processor with Workstation Subsystem Controller. A keyboard permits an operator to display and manipulate data on the screen. The 3178 meets both general-purpose and unique display requirements.
A monocase switch, located on the keyboard, provides the capability of switching to uppercase alphanumeric mode for 3277 compatibility. Uses 3270 field formatting capability which permits individual fields of data on the screen to be program-defined with various attributes such as protected/unprotected, alphanumeric, normal/intensified, and displayable/non-displayable.
The operator may initiate a local display-to-printer copy function (i.e., without host intervention) from the keyboard of 3178. When the 3178 is attached to a 3274 or 4300 Processor Display Printer Adapter, a 4361 Workstation Adapter or 9370 Workstation Subsystem Controller, the printer designation is controlled by operator use of the IDENT key and by: (a) a printer authorization matrix which is loaded into the 3274 through a user written host application program, or, (b) a customer definable matrix loaded from the System Diskette at IML time. For further details, see the "IBM 3270 Information Display System Planning and Setup Guide", GA27-2827.
When the 3178 is attached to a 3276, the printer designation is controlled by operator use of the IDENT Key and by a configuration default matrix. This matrix is determined by the relative positions of devices attached to the 3276. (The host can perform a copy in a manner compatible with 3271/3272 support.)
The 3178 consists of three workstation elements (WSEs): video, keyboard elements. With optional extension cables, provided as accessory, the logic unit may be placed away from the video unit and the keyboard. The logic unit may be mounted on a vertical surface such as the side of a desk or a wall using a mounting bracket provided as a separate accessory.
Attachment Required on Control Unit
The 3178 has an etched screen, which minimizes glare and fingerprint. Indicators are displayed in symbols on the bottom row of the screen, outside the data area, and provide useful operator information. Updating the screen from the host is accomplished without refresh interruption (i.e., no blinking). An underline type cursor and a rectangular reverse video cursor, with blinking option, are provided. An audible alarm is provided to alert the operator. The volume of the alarm can be adjusted by the operator. The cable connected keyboard can be moved and the video element can be tilted and swiveled to change the screen angle for the operator. The keyboard is light and thin, and the keyboard can be adjusted to either 12 degrees by attaching or 6 degrees by detaching the keyboard foot assembly offered as basic.
Input Editing Capability
Cursor move, tab, home key, back tab, insert, delete, extended erase (erase to end-of-field, erase all keyboard input data, and erase entire screen) and cursor select keys are all basic for displays equipped with a keyboard. All alphanumeric, special symbol, and cursor move keys have typamatic capability. Double speed cursor typamatic is attached with a simultaneous depressing of the ALT key and a horizontal cursor positioning key. Fields of data may be selected by positioning the cursor, then using the cursor select key. Ten Program Function (PF) keys are available on the Data Entry Keyboard; 24 PF keys are available on the Typewriter Keyboard.
When attached to a 3274 with Configuration Support C with Entry Assist RPQ or with Configuration Support D and with a typewriter keyboard (3178 Model C2), it provides capabilities which facilitate operator entry and editing of text material. The capabilities include margins, tabbing, wordwrap, improved cursor positioning, improved character/word delete, cursor position indicator and an audible end-of-line warning tone. Entry Assist is intended for use primarily with a specific set of host editor programs. See 3274 pages for languages supported.
A special non-displayed input mode provides for fields of data to be program-defined so that they will accept data entered from the keyboard without displaying the data on the screen. A Security Keylock prevents modification or display of data in the display terminal unless the key is turned to the "on" position.
These capabilities and the terminal's ability to identify itself to the host program allow customer-supplied security program routines to control access to data and audit of actions.
Customer Problem Analysis and Resolution
Functions have been designed into the 3178 to enhance the availability to the customer. This has been done through the use of customer problem analysis and resolution (CPAR) routines and procedures that are used by the operator. See "Customer Responsibilities". Models Model Summary Matrix
Model Characters KeyboardC10 1,920 75-key data entry
C20 1,920 87-key data entry
C30 1,920 87-key typewriter
C40 1,920 87-key typewriter
Customer Setup (CSU)The 3178 is designated as a customer setup machine except for the Logic Unit Mounting Bracket accessory. The customer is responsible for arranging for the attachment of the Mounting Bracket to the desk, wall or other surface. Setup instructions are included with each machine, as a part of the "IBM 3178 Display Station Operator Reference Guide".
The customer is responsible for:
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