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Print Hammer Echo Check Circuitry

IP.com Disclosure Number: IPCOM000067347D
Original Publication Date: 1979-Jul-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Clegg, JA Pinheiro, EJ Wells, DK [+details]

Abstract

The echo check circuitry is placed in operation by a Hammer Echo Check command coming from the printer attachment. This command is applied via line 5 to control 10 which is responsive to the command and places a preload count value on line 11 for preloading 8-bit counter 20 with a value dependent upon the model of the printer being controlled (Fig. 1).