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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
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