Controlling logical channel use based upon printing system envir

Details Controlling logical channel use based upon printing system envir Controlling logical channel use based upon printing system envir

1995-12-13

1998-06-02

Coles, Sr., Edward L.

395112, G06K 1500

Patent

active

057613974

ABSTRACT:
A system and method controls logical channel use when ECP negotiation is made between a host computer and a dual mode printer. Namely, specifically defined logical channel functionality is provided for the dual mode printer supporting, for example, Sleek ECP and PCL ECP communications. The method comprises (a) the host computer negotiating with the printer into a first communication mode other than ECP mode, in the event that the computing system is to subsequently enter into Sleek ECP mode; (b) setting a placeholder in a memory of the printer, the placeholder indicating that subsequent negotiation into ECP mode requires logical channel use; (c) terminating the first communication mode; (d) negotiating into ECP mode; (e) reading the placeholder to determine if it is set; and, (f) activating logical channels for use in the event the placeholder is set.

REFERENCES:
patent: 5461701 (1995-10-01), Voth
patent: 5490237 (1996-02-01), Zimmerman et al.
patent: 5555374 (1996-09-01), Armerding et al.
patent: 5596416 (1997-01-01), Barry et al.
patent: 5633992 (1997-05-01), Gyllenskog

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