HP 8100 Parallel Interface Support, Standard Parallel Port Mode, Enhanced Parallel Port Mode

Models: 8100

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Input/Output Interfaces

5.4Parallel Interface Support

These systems include a system board header (J50) that supports an optional parallel bracket/cable assembly that provides a parallel interface for a peripheral device such as a printer. The parallel interface supports bi-directional 8-bit parallel data transfers with a peripheral device. The parallel interface supports three main modes of operation:

Standard Parallel Port (SPP) mode

Enhanced Parallel Port (EPP) mode

Extended Capabilities Port (ECP) mode

These three modes (and their submodes) provide complete support as specified for an IEEE 1284 parallel port.

5.4.1 Standard Parallel Port Mode

The Standard Parallel Port (SPP) mode uses software-based protocol and includes two sub-modes of operation, compatible and extended, both of which can provide data transfers up to 150 KB/s. In the compatible mode, CPU write data is simply presented on the eight data lines. A CPU read of the parallel port yields the last data byte that was written.

5.4.2 Enhanced Parallel Port Mode

In Enhanced Parallel Port (EPP) mode, increased data transfers are possible (up to 2 MB/s) due to a hardware protocol that provides automatic address and strobe generation. EPP revisions 1.7 and 1.9 are both supported. For the parallel interface to be initialized for EPP mode, a negotiation phase is entered to detect whether or not the connected peripheral is compatible with EPP mode. If compatible, then EPP mode can be used. In EPP mode, system timing is closely coupled to EPP timing. A watchdog timer is used to prevent system lockup.

5.4.3 Extended Capabilities Port Mode

The Extended Capabilities Port (ECP) mode, like EPP, also uses a hardware protocol-based design that supports transfers up to 2 MB/s. Automatic generation of addresses and strobes as well as Run Length Encoding (RLE) decompression is supported by ECP mode. The ECP mode includes a bi-directional FIFO buffer that can be accessed by the CPU using DMA or programmed I/O. For the parallel interface to be initialized for ECP mode, a negotiation phase is entered to detect whether or not the connected peripheral is compatible with ECP mode. If compatible, then ECP mode can be used.

The ECP mode includes several sub-modes as determined by the Extended Control register. Two submodes of ECP allow the parallel port to be controlled by software. In these modes, the FIFO is cleared and not used, and DMA and RLE are inhibited.

 

Technical Reference Guide

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HP 8100 manual Parallel Interface Support, Standard Parallel Port Mode, Enhanced Parallel Port Mode

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.