method for zufuehrung data from a data source to a druckersystem and interfaceschaltung for implementation of this method

摘要

An interface circuit between a computer and a print out system including a stepping paper printer for printing the data received from the computer, the data from the computer being transmitted in the form of separate bytes, each comprising a plurality of bits, a raster scan forming one line of the print out comprising a plurality of said bytes, means being provided for detecting the print out of the last byte of each raster scan and for detecting the receipt of the first byte of the next incoming raster scan and for producing automatically a step command signal to step the printer paper one line and also a line sync command to the write logic of the printer system. A delay signal is also produced to inhibit the writing of the first byte of said next incoming raster until said print out system has responded to said step and line sync commands.