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Compatible Scheme to Query Printer Capabilities Disclosure Number: IPCOM000036215D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28

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Marks, LV [+details]


Disclosed is a technique for querying the capabilities of a standard printer over the standard parallel interface. The technique is based on using a constant 'escape sequence' prefix preceding normal printer commands to indicate that datastream is a query. The scheme is compatible and can be used with any parallel printer without setting undesired printer modes.