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Book: LPI Linux Certification in a Nutshell
Section: Chapter 24. Exam 102 Highlighter's Index
24.1 Hardware and Architecture 24.1.1 Objective 1: Configure Fundamental System Hardware 24.1.1.1 PC BIOS -
The BIOS is the PC's firmware. -
The BIOS sets date and time for onboard clock, storage device configuration, and so on via menus. 24.1.1.2 Resource assignments -
Interrupts (IRQs) allow peripherals to interrupt the CPU. -
I/O addresses are locations in the microprocessor's memory map for hardware devices. -
DMA allows certain devices to work directly with memory, freeing the microprocessor (see Table 24-1). Table 24-1. Some Common Device Settings | ttyS0 (COM1) | 3f8 | 4 | NA | | ttyS1 (COM2) | 2f8 | 3 | NA | | ttyS2 (COM3) | 3e8 | 4 | NA | | ttyS3 (COM4) | 2e8 | 3 | NA | | lp0 (LPT1) | 378-37f | 7 | NA | | lp1 (LPT2) | 278-27f | 5 | NA | | fd0, fd1 (floppies 1 and 2) | 3f0-3f7 | 6 | 2 | | fd2, fd3 (floppies 3 and 4) | 370-377 | 10 | 3 | 24.1.1.3 1024-cylinder limit 24.1.2 Objective 2: Set Up SCSI and NIC Devices 24.1.2.1 NICs -
NICs have been configured using hardware jumpers, nonvolatile memory, and automated means. -
The proc filesystem includes information on interrupts, I/O ports, and DMA in /proc/interrupts, /proc/ioports, and /proc/dma. 24.1.2.2 SCSI -
The Small Computer System Interface (SCSI) defines a bus for multiple storage devices. -
SCSI capabilities range from 5 MBps to 80 MBps and higher for the newest types. -
8-bit SCSI offers up to seven devices plus the controller on a single bus. -
16-bit SCSI offers up to 15 devices plus the controller on a single bus. -
Each device on the bus has a unique SCSI ID, 0-7 or 0-15. Controllers often default to address 7. -
Linux device files for SCSI disks are typically /dev/sda, /dev/sdb, and so forth. -
Linux device files for SCSI tape drives are typically /dev/st0, /dev/st1, and so on. -
SCSI buses must be terminated on both ends. Many SCSI devices include internal terminators to eliminate the need for external terminators. -
PC SCSI adapters have their own BIOS, where the default boot device, bus speed, and onboard termination settings can be made. 24.1.3 Objective 3: Configure Modems and Sound Cards 24.1.3.1 Modems -
Modems are serial devices. Some are external and are attached to a serial port. Others are installed in a computer and include serial port electronics onboard. -
Some modems are cost-reduced by implementing portions of their functionality in Windows software libraries. These so-called "WinModems" often aren't compatible with Linux without add-on drivers. 24.1.3.2 Sound devices -
Sound is well-supported under Linux. -
pnpdump output is stored for use at boot time by isapnp, which does plug-n-play configuration.  | | |
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