Hewlett-packard Company

Hewlett-packard Development Company, L.P.

Marvin D Nelson

Douglas L Voigt

Michael B Jacobson

Theresa A Burkes

Bryan M Diamond

Honee L Mesa

Paul L Jeran

Erik D Ness

Chris Richard Gunning

Vincent C Skurdal

Barry J Oldfield

Mark Louis Brown

Jennifer Lynn Melin

Wade A Dolphin

Mark D Petersen

Randy J Matthews

Robert Baird

Kurt Robert Bengtson

Eli S Saber

David G Bohan

Gary T Brown

Kurt Robert Bengston

Terry James Garrison

Rakshit Sunil Kothari

Frederick W Pew

Xiang-Qin Wen

Hamid Vazire

John W Fordemwalt

Michael A Stauffer

Brian C Mayer

According to examples, an apparatus may include a first hardware component including a first memory and a first processor. The first processor may initiate pairing between the first hardware component and a second hardware component to establish a trusted relationship between the first hardware component and a second hardware component. In response to a successful pairing between the first hardware component and the second hardware component, the processor may compare a first setting of the first hardware component with a second setting of the second hardware component. In response to a determination that the second setting corresponds to the first setting, the processor may authorize operation of the second hardware component.

Pairing hardware components to authorize operation

Systems and methods related to a remote configuration system are disclosed. The system includes a processing resource and a non-transitory machine-readable medium storing instructions executable by the processing resource to send an identification code to a server to initiate a system configuration, receive a payload including a configuration instruction responsive to the sent identification code, configure the system utilizing the payload including the configuration instruction, where the system is permanently configured, and store a receipt including the payload responsive to the configuration of the system.

Remote system configuration

Secure circuitry detects a latency between when an interrupt occurred and when the interrupt was released in correspondence with handling of the interrupt. The secure circuitry detects an interval between consecutive occurrences of the interrupt. In response to either or both of the latency exceeding a latency limit and the interval exceeding an interval limit, the secure circuitry performs an action.

Interrupt latency and interval tracking

Examples associated with firmware encryption are described. One example device firmware includes a base module. The base module controls a base function of the device. The device firmware also includes a first encrypted module that modifies a first function of the device. The first encrypted module is inactive until decrypted. A decryption module decrypts the first module using a first encryption key and controls activation of the first encrypted module.

Firmware module encryption

Examples associated with printer authentication are described. One example print container includes a space for a supply of print material and an interface for delivering the print material to a printer to which the print container is connected. An authentication module provides an authentication signal to a decrypted module embedded in firmware of the printer. The decrypted firmware module is kept in an encrypted state until decrypted by a decryption module embedded in the firmware of the printer. The decrypted module is decrypted after the decryption module receives a decryption key after release of the printer.

Printer authentication

Examples associated with printer firmware encryption are described. One example printer includes a base firmware module. The base firmware module controls a base function of the printer. The printer also includes a first encrypted firmware module that modifies a first function of the printer. The first encrypted module is inactive until decrypted. A firmware decryption module decrypts the first encrypted module upon receiving a first encryption key.

Printer firmware encryption

In one example, image forming quality is stabilized by monitoring aging characteristics of an image forming system including its set of supplies. When an age-related triggering event occurs, a set of modified parameters are substituted for a set of standardized parameters. This substitution increases the image forming quality while sacrificing some visual acuity based on user preferences from psychometric testing.

Stabilizing image forming quality

Methods and apparatus for validating a system include reading protected record data for a section of the system from a secure storage element, and verifying integrity of the section of the system using the record data. The secure storage element independently verifies that all record data and data to be written to the system is valid.

Code validation

An example involves identifying a first artifact in an image on a display, the first artifact caused by a first subpixel of a first pixel, determining a type of the first artifact based on a location of the first artifact relative to content of the image, and correcting the first artifact to remove the appearance of the first artifact from the display based on the type of the first artifact.

Correcting artifacts on a display

A method for booting a printer includes storing a configuration image of the printer on a network storage device. The configuration image includes an input/output (I/O) initialization sequence for at least one component of the printer and I/O flow control steps and timing. The method further includes downloading the configuration image from the network storage device to the printer and playing back the initialization sequence and flow control based on the configuration image.

Booting a printer

An electronic device includes a scanning device for converting one or more configuration symbols on a printed medium into scan data. The scanning device is capable of scanning a configuration sheet and creating the scan data, including the one or more configuration symbols. The electronic device further includes a configuration device that receives the scan data and is capable of extracting the one or more configuration symbols to create one or more corresponding address-independent configuration values. The configuration device is further capable of configuring the electronic device with the one or more address-independent configuration values.

Apparatus and method for configuration of an electronic device using a scanned configuration sheet

An electronic device includes a scanning device for converting indicia and markings on a printed medium into scan data and a configuration device that receives the scan data. The scanning device is capable of scanning a user-fillable configuration sheet marked by a user of the electronic device and creating the scan data, with the scan data including one or more configuration indicia. The configuration device is capable of decoding the one or more configuration indicia to create one or more corresponding configuration values and configuring the electronic device with the one or more configuration values.

Apparatus and method for configuration of an electronic device using a user-fillable configuration sheet

A printer is described. The printer includes a CPU, a DMA controller and an internal memory. The CPU and the DMA controller are each connected to a first memory bus. The internal memory is connected to a second memory bus. The printer further included an address translation unit connected to both the first and the second memory bus. The address translation operates to receive virtual addresses from both the CPU and the DMA controller over the first memory bus and translates these virtual addresses into physical addresses. The address translation unit transmits the physical addresses to the memory over the second memory bus.

System and method for transferring data within a printer

It has been determined that considerable data which is written to stacks is of the type that does not require long term retention (i.e., it is only required to be valid for the duration of a procedure or function which created it). Accordingly, when a stack is employed to handle such data (and other similar data), invalidation and writes to main memory that ordinarily accompany accesses of such data (when the stack is held in a cache memory) can be avoided. The invention therefore improves memory performance by providing an overlay memory, to which is assigned a set of main memory addresses that are utilized for stack operations. When data is either read or written from/to the overlay memory, there is no further communication &ldquo;downstream&rdquo; to either a cache memory or main memory. In other words, the overlay memory is used for short term storage and accesses to the overlay memory are invisible to other memory elements of the system. There is thus no need to invalidate any data and nor to write such data to main memory. As a result, substantially improved memory operations result.

Growing community of inventors

Boise, ID, United States of America

Marvin D Nelson