Improving the Effectiveness of the IBM 4224 Printer
Original Publication Date: 1988-May-01
Included in the Prior Art Database: 2005-Feb-15
Host Programs can now use a new datastream architecture to communicate with the IBM 4224 printer. It is called the Intelligent Printer Data Stream (IPDS) architecture. Using IPDS, alphanumerics (after conversion into an IPDS text format), image symbol sets, bit-for-pel image and vector graphics data (in any mixture) can be sent to the 4224 printer. The base model contains 64 KBytes of RAM, of which some 35 KBytes are available to a host program, such as GDDM, for storing picture data. The extended storage model has 512 KBytes of RAM, of which some 448 KBytes are available. Alphanumerics and image data can be printed immediately they are received by the printer. Printing of graphics data is normally deferred. This means that, initially, all the graphics data has to be stored within the printer.