Browse Prior Art Database

Maintenance Guidance Technique

IP.com Disclosure Number: IPCOM000084113D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Markson, KJ: AUTHOR [+2]

Abstract

A microprogram controlled device including a display such as a cathode-ray tube (CRT), may be used as a diagnostic aid with respect to any device connected within the system. A device which utilizes 16 lines to indicate its status to a microprogram controlled processor may have the lines displayed as 4 HEX characters, each of which represent 4 lines. The diagnostic information is presented as shown in Fig. 1, wherein U 5 B8 A0 are displayed.

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Maintenance Guidance Technique

A microprogram controlled device including a display such as a cathode-ray tube (CRT), may be used as a diagnostic aid with respect to any device connected within the system. A device which utilizes 16 lines to indicate its status to a microprogram controlled processor may have the lines displayed as 4 HEX characters, each of which represent 4 lines. The diagnostic information is presented as shown in Fig. 1, wherein U 5 B8 A0 are displayed.

The "U" is displayed at the standard error position of the processor display and indicates not only that an error condition exists, but the unit affected and to which the identified status information pertains. The character "5" identifies the Maintenance Analysis Procedure (MAP), which is a page of diagnostic information or service flow chart that is correct to use to repair the failure. The 4 HEX characters (B8 A0 in the illustrated example) may also be used to give status of a failure not covered by one of the MAPs. This is particularly valuable in identifying unique or infrequent failures reported as a result of maintenance on installed equipment.

The 16 lines of status information are identified by the character number and bit number, as seen in Table I. The priority of the 16 lines is established by the 1 and 0 binary expansion of the HEX characters, as shown in Table I, in conjunction with the priority sequence from 1 to 16 on the lower line of the table. In the example shown, the highest...