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