Browse Prior Art Database

Programmable Hammer Addressing for a Line Printer

IP.com Disclosure Number: IPCOM000041268D
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Carrington, JE Hryck, MD Westcott, GR [+details]

Abstract

The print controls of a line printer are provided with a programmable memory for storing a table of hammer addresses which can be changed if the hammer driver addresses are changed without changing the address circuitry. The print controls for a line printer include a Hammer Address Buffer (HAB) 10 to be addressed simultaneously with the Print Line Buffer (PLB) 11, the Check Buffer (CKB) 12, and the Band Image Buffer (BIB) 13. PLB 11 is a read/write memory which is loaded with data to be printed at various print positions of a print line. HAB 10 is likewise a read/write memory which is loaded by a microprocessor with a Hammer Address Table (HAT) consisting of the addresses for the hammers corresponding to the print positions of the print line.