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Keyboard-Invoked Operator Selectable Display Options on an Interactive CRT Work Station

IP.com Disclosure Number: IPCOM000046712D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 81K

Publishing Venue

IBM

Related People

Heikel, HH: AUTHOR [+4]

Abstract

This select mode option for an interactive station allows the operator to alter or select display characteristics such as bar, blink or block-type cursor. In addition, the select mode option provides for invoking service procedures or display test patterns to enhance problem diagnosis and repair. The options are available when the work station is either "on line" communicating with a host system or "offline" when performing maintenance. Control of this mode is accomplished with a status switch, a programmable peripheral interface (i.e., Intel 8255A) and a microprocessor, all within the CRT work station. The selectable options are performed by this work station microprocessor and are independent of host system support.

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Keyboard-Invoked Operator Selectable Display Options on an Interactive CRT Work Station

This select mode option for an interactive station allows the operator to alter or select display characteristics such as bar, blink or block-type cursor. In addition, the select mode option provides for invoking service procedures or display test patterns to enhance problem diagnosis and repair. The options are available when the work station is either "on line" communicating with a host system or "offline" when performing maintenance. Control of this mode is accomplished with a status switch, a programmable peripheral interface (i.e., Intel 8255A) and a microprocessor, all within the CRT work station. The selectable options are performed by this work station microprocessor and are independent of host system support. The online select mode is entered by holding the CMD key and depressing the RESET key, as illustrated in the drawing. Thereafter, the keyboard scan codes are no longer transmitted to the host. Instead, the scan codes are sent to the online select mode keystroke handler. The numeric keys allow the operator to select options, such as the cursor characteristics (bar or block), adjustment of the alarm volume, etc. Depression of the "+" key followed by the "enter" key places the work station in the offline select mode. A return to normal, online, operation can be effected by depressing the "reset" key. Invalid key operations are detected and cause an alarm to sound br...