PPA Printer Firmware Design
Hewlett-Packard’s new Printing Performance Architecture (PPA) includes a significantly reduced set of printer firmware. “Don’t touch the dots” was the firmware designer’s golden rule. This means that the firmware and processor do only mechanism control, I/O, command parsing, status reporting, user interface, and general housekeeping functions.
by Erik Kilk
Article 3 - jun97a3.pdf
This article is available in Adobe Acrobat format (PDF). To view this article you need to have Acrobat Reader 2.0 or later installed on your system. The Acrobat reader is available free of charge in Unix, Dos, Windows and Macintosh formats. You can download the reader from Adobe Systems (www.adobe.com)