BIDIRECTIONAL PARALLEL PRINTER INTERFACE

PURPOSE: To make an operator confirm the state of a printer without going to the place of the printer by making a data processor report whether information transmitted to the printer is data signals or state signals. CONSTITUTION: A computer 40 which is the data processor is connected to the printer...

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Hauptverfasser:	JIEEMUZU RII BETSUKU, MAAGARETSUTO ERIZABESU KURATSUFUII KOOEN, KAARU PURAISU KOORU, TEIMOSHII YUNNMIN RUUI, RIN MAABIN ORIBAA, JIEEMUZU PIITAA UOODO, JIEEMUZU KUROIDO BUKIYANAN, JIEEMUZU FURANSHISU UEBU, JIEEMUZU RONARUDO BUUSU, ARAN FUOOBUSU NIIRU ZA SEKANDO
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING CORRECTION OF TYPOGRAPHICAL ERRORS COUNTING ELECTRIC DIGITAL DATA PROCESSING i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	PURPOSE: To make an operator confirm the state of a printer without going to the place of the printer by making a data processor report whether information transmitted to the printer is data signals or state signals. CONSTITUTION: A computer 40 which is the data processor is connected to the printer 41 by a cable 42. When the power of the computer 40 and the printer 41 is turned ON, it is assumed that they are operated in a mode where the printer 41 is placed in a single direction. In order to activate a bidirectional mode so as to make the printer 41 able to transmit and receive the information, the computer 41 sets-INIT to low and the printer 41 sets +BUSY to high in response to it. When the printer 41 is prepared to receive a state command, +BUSY is turned low. In the case that the printer 41 does not set +BUSY, it is assumed that the computer 40 can not respond whether the printer 41 is unidiretional or bidirectional due to the fault of a hardware.