System Support

Link Layer

The link layer provides data integrity by adding a sequence information prefix and a CRC suffix to the packet created by the transaction layer. Flow-control methods ensure that a packet will only be transferred if the receiving device is ready to accomodate it. A corrupted packet will be automatically re-sent.

Physical Layer

The PCIe bus uses a point-to-point, high-speed TX/RX serial lane topology. One or more full-duplex lanes transfer data serially, and the design allows for scalability depending on end-point capabilities. Each lane consists of two differential pairs of signal paths; one for transmit, one for receive (Figure 4-1).

System Board

Device A

TX

RX

PCI Express Card

Device B

Figure 4-1. PCIe Bus Lane

Each byte is transferred using 8b/10b encoding. which embeds the clock signal with the data. Operating at a 2.5 Gigabit transfer rate, a single lane can provide a data flow of 200 MBps. The bandwidth is increased if additional lanes are available for use. During the initialization process, two PCIe devices will negotiate for the number of lanes available and the speed the link can operate at. In a x1 (single lane) interface, all data bytes are transferred serially over the lane. In a multi-lane interface, data bytes are distributed across the lanes using a multiplex scheme.

4.2.3 Option ROM Mapping

During POST, the PCI bus is scanned for devices that contain their own specific firmware in ROM. Such option ROM data, if detected, is loaded into system memory's DOS compatibility area (refer to the system memory map shown in chapter 3).

4.2.4 PCI Interrupts

Eight interrupt signals (INTA- thru INTH-) are available for use by PCI devices. These signals may be generated by on-board PCI devices or by devices installed in the PCI slots. For more information on interrupts including PCI interrupt mapping refer to the “System Resources” section 4.3.

4.2.5 PCI Power Management Support

This system complies with the PCI Power Management Interface Specification (rev 1.0). The PCI Power Management Enable (PME-) signal is supported by the chipset and allows compliant PCI peripherals to initiate the power management routine.

 

4-4

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Technical Reference Guide

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HP 8100 manual Option ROM Mapping, PCI Interrupts, PCI Power Management Support, Link Layer, Physical Layer
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8100 specifications

The HP 8100 series is a line of powerful and versatile printers designed to meet the demanding needs of businesses and offices. Known for its durability and efficiency, the HP 8100 is particularly popular among professionals seeking high-quality prints with fast turnaround times.

One of the standout features of the HP 8100 is its capability to deliver impressive print speeds. With a print speed of up to 60 pages per minute, this printer significantly reduces wait times, allowing businesses to increase productivity. Furthermore, the first page out time is remarkably fast, making it ideal for busy office environments requiring quick document retrieval.

The HP 8100 utilizes HP's advanced LaserJet technology, which ensures sharp and consistent print quality across a range of media types. The printer is capable of producing professional-grade documents with a resolution of up to 1200 x 1200 dpi, making text crisp and images vibrant. This high-quality output is essential for creating marketing materials, reports, and other important documentation.

Another significant characteristic of the HP 8100 is its expandable paper handling capabilities. The printer comes with a standard input tray that accommodates a substantial volume of paper, while optional trays can be added to further increase capacity. This flexibility is particularly beneficial for businesses managing high-volume printing tasks.

The HP 8100 is equipped with a variety of connectivity options, including USB, Ethernet, and wireless capabilities. This versatility allows for easy integration with existing office networks, enabling multiple users to access the printer simultaneously. Additionally, mobile printing features support printing from smartphones and tablets, enhancing convenience for on-the-go professionals.

Energy efficiency is another major advantage of the HP 8100 series. Designed to consume less energy, this printer adheres to energy-saving standards, which can help reduce operational costs for businesses. The printer’s efficiency is complemented by its reliable performance, often with minimal maintenance requirements, ensuring that it remains a staple in the office for years to come.

In the realm of security, HP provides several features to protect sensitive information. Secure printing options and user authentication help safeguard documents, which is crucial for maintaining confidentiality in corporate environments.

Overall, the HP 8100 series stands out for its exceptional print speed, high-quality output, robust connectivity options, and energy efficiency. These characteristics make it an excellent choice for businesses looking to enhance their printing capabilities.
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