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PC Interfacing, Communications and Windows Programming

pipelined-memory read and write operations that hides any memory access delays.

  • 82371AB PCI/ISA IDE Xcellerator (PIIX4). Support for PCI bridge, USB control- ler, IDE controller, DMA controller, Interrupt controller, Power management and real-time clocks. The IDE interface supports Mode 3 and Mode 4 transfers at up to 16 MB/s and also Ultra DMA/33 which gives synchronous DMA transfers at up to 33 MB/s. It also supports ATAPI devices (such as CD-ROMs).

  • National Semiconductor PC97307 Super I/O Controller. Supports two serial ports, a multimode parallel port (standard mode, EPP and ECP), floppy disk controller (DP8473 and N82077 compatible), keyboard controller, mouse controller and Infra- red communications controller. The serial ports contain two 16450/166550A- compatiable UARTs which have an integrated 16-byte FIFO buffer for storing in- coming and outgoing characters. The floppy disk controller also has a 16-byte FIFO buffer.

  • Support for LS-120MB floppy disk drives and Desktop Management Interface

(DMI). DMI is a management system for networked PC, where a system manager can control the settings remotely.

    • 11.19

      Exercises

      • 11.19.1

        Outline the importance of the TXC (system controller) device in the PC. Out-

line also the main ICs that are used in a PC.

      • 11.19.2

        Describe, in detail, the architecture of the HX PCI chip-set, and how the Pentium processor communicates with: DRAM memory, Level-2 SRAM cache, the PCI bus, the ISA bus and the IDE bus.

      • 11.19.3

        Explain, with reference to the PIIX3 and Pentium processor, how interrupts on the PCI and ISA busses are dealt with.

      • 11.19.4

        Explain, with reference to the Level-1 cache, the Level-2 cache and DRAM, how the processor accesses memory. What advantage does Level-1 over Level-2 cache, and the advantage that these have over DRAM.

      • 11.19.5

        Discuss the power management modes supported by the PXII3.

11.19.6

Which interrupts are supported with the AIP and where are they typically used?

      • 11.19.7

        Explain how the ISA and IDE busses share the same control and data lines.

      • 11.19.8

        Contrast the HX motherboard with the LX motherboard.

      • 11.19.9

        What are the advantages of using a SEC connected processor rather than a

Socket 7 connected processor.

11.19.10 If possible, open up a PC and identify the ICs on the motherboard.

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