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Microcode Analysis Technique for Printer Disclosure Number: IPCOM000061111D
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09

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DiIorio, RW Gregor, JS Webb, JF [+details]


The inclusion of basic microcode analysis functions in an operator- selectable utility program for a printer decreases the need for diagnostic instruments and enables remote diagnosis via telephone. An analytical utility program can be made selectable at the operator panel of a printer having a keyboard, indicator lights and limited alphanumeric display. Once selected, the utility program redefines the functions of the keys. An example of functions available in a microcode diagnostic program are: Display and Alter Memory Scan Memory for Unique Data String Display and Alter Diskette Instruction Address Match Instruction Address Match with Data Store Instruction Address Match with Extended Data Log Supporting utility code runs at low interrupt priority so normal printer functions are not disturbed.