CHAPTER 2

Architecture

System RAM

The memory subsystem in the PowerBook G4 17-inch computer supports two slots for 333 MHz DDR (PC2700) SO-DIMMs (small-outline dual inline memory modules). The data bus to the RAM and DIMM is 64 bits wide, and the memory interface is synchronized to the MaxBus bus interface at 167 MHz. See “RAM Expansion Slots” (page 53).

Boot ROM

The boot ROM is connected to the Intrepid IC by way of the high byte of the PCI bus plus three additional control signals: chip select, write enable, and output enable. The boot ROM is a 1 MB by 8 bit device.

FireWire Controllers

The Intrepid IC FireWire controller supports IEEE 1394a for a maximum data rate of 400 Mbps (50 MBps) and IEEE 1394b for a maximum data rate of 800 Mbps (100 MBps). The Intrepid IC provides DMA (direct memory access) support for the FireWire interface.

The controller in the Intrepid IC implements the FireWire link layer. A physical layer IC, called a PHY, implements the electrical signaling protocol of the FireWire interface and provides the electrical signals to the port. For more information, see “FireWire 400 Connector” (page 26) and “FireWire 800 Connector” (page 27).

Ethernet Controller

The Intrepid IC includes an Ethernet media access controller (MAC) that implements the link layer. The Intrepid IC provides DB-DMA support for the Ethernet interface.

The Ethernet controller in the Intrepid IC is connected to a PHY interface IC that provides the electrical signals to the port. The PHY is capable of operating in either 10Base-T, 100Base-T, or 1000Base-T mode: The actual speed of the link is automatically negotiated by the PHY and the bridge or router to which it is connected. For more information, see “Ethernet Port” (page 29).

The PHY supports Auto-MDIX, which allows the use of straight-through cables in crossover situations (and conversely). For more information, see “Ethernet Port” (page 29).

Video Display Subsystem

The video display subsystem contains the graphics controller IC along with 64 MB of DDR SDRAM memory. The graphics IC, an nVidia GeForce4 440 Go, contains 2D and 3D acceleration engines, front-end and back-end scalers, a CRT controller, and an AGP4x bus interface with bus master capability.

The features of the nVidia GeForce4 440 Go include

●graphics processor clock speed of 189 MHz

●memory clock speed of 202.5 MHz

20Intrepid Controller and Buses

Legacy Document 2003-03-01 © 2003 Apple Computer, Inc. All Rights Reserved.

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Apple 17-INCH manual System RAM, Boot ROM, FireWire Controllers, Ethernet Controller, Video Display Subsystem
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17-INCH specifications

The Apple 17-inch model has garnered attention for its impressive balance of performance and portability, making it a popular choice among professionals and creative users alike. Boasting a sleek design, it combines cutting-edge technologies with user-friendly features that enhance productivity and entertainment experiences.

At the heart of the 17-inch display is Apple's Retina technology, which provides stunning visual clarity and vibrant colors. With a resolution that surpasses traditional screens, users can expect crisp text and detailed images, making it an ideal choice for graphic designers, video editors, and anyone who values high-quality visuals. The large screen size creates an immersive experience, especially useful for multitasking, viewing spreadsheets side by side, or editing documents side by side.

Powered by Apple’s latest custom silicon, the 17-inch model delivers remarkable performance. The optimizations in the chip architecture enhance not only processing speeds but also energy efficiency, allowing users to accomplish more without compromising battery life. These advancements in chip technology together with integrated graphics offer smooth performance during intensive tasks such as rendering high-definition graphics or playing demanding games.

The laptop also comes equipped with a robust battery system designed to keep users productive for extended periods. Users can expect several hours of usage on a single charge, ensuring that they can work or enjoy media without the constant need to recharge. Furthermore, fast-charging capabilities minimize downtime, making it convenient for on-the-go professionals.

In terms of connectivity, the 17-inch model offers multiple Thunderbolt and USB-C ports, allowing for quick data transfer and connecting a variety of external devices. This versatility is essential for professionals who may need to hook up to external monitors or utilize peripherals for enhanced functionality.

The built-in audio system features high-fidelity speakers, delivering an outstanding audio experience for music, movies, and video conferencing. The integration of advanced microphones further enhances clarity during calls, making communication seamless.

Overall, the Apple 17-inch laptop stands out as a powerful tool designed for those who demand performance, quality, and flexibility in their devices. With its blend of stunning visuals, powerful processing capabilities, and user-centric features, it remains a strong contender in the market for those seeking a reliable and stylish computing solution.
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