Graphical data processing apparatus

摘要: Hard copy graphical output of a suitably programmed data processing system is generated in matrix printer response to controls and binary image information presented the invention form serially received blocks, such as from tape drive. The accordance herewith receives blocks including standard templates, 16 printable dots wide high. block includes an input address for storing each template which follows address. also literal codes are stored predetermined sequentially addressed locations memory, order receipt relating templates be accessed printing. addresses used comprise high-order portions, supplying sequences low-ordered portions therewith purpose accessing repetitively, sequence, storage block. Variations format achieved with variations video clock rate respect presentation at imager, sheet transport speed, basic rate, horizontal vertical linking truncation (to less than size), resolution variation resulting single or quadruple spot generation per bit. Data by include control characters controlling above features. Indirect addressing automatic low-order bits both read write read-write memory; scanning through successive memory correct print one dot row time many should appear line, times there rows designated line.