CompTIA's A+ Core
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  1. #1

    CompTIA's A+ Core

    Here are a few charts for CompTIA's A+ Core certification. There are some other charts that you should know before takeing the exam but they're not included in this tutorial. If anyone wants to add to this, feel free to do so.

    CompTIA's A+ Certification Charts

    Open Systems Interconnection Model (OSI)

    7. Application
    6. Presentation
    5. Session
    4. Transport
    3. Network
    2. Data Link
    1. Physical

    568B Standard Cabling Configurations

    568B Standard
    Pin Color Pair#
    1 White/Orange 2
    2 Orange 2
    3 White/Green 3
    4 Blue 1
    5 White/Blue 1
    6 Green 3
    7 White/Brown 4
    8 Brown 4

    568A Standard Cabling Configurations

    Pint Color Pair#

    1 White/Green 3
    2 Green 3
    3 White/Orange 2
    4 Blue 1
    5 White/Blue 1
    6 Orange 2
    7 White/Brown 4
    8 Brown 4

    Common Computer Connectors
    USB 4+ Shield
    Keyboard 5 & 6
    Serial 9
    Videl 15
    Parallel 25
    Floppy 34
    Centronics 36
    IDE 40
    SCSI 50
    Wide SCSI 68


    Commmon IRQ's (Interrupts), DMA's & I/O's
    IRQ DMA I/O

    0 System Timer 040
    1 Keyboard 060
    2 Interrupt 9 0A0
    3 COM2 2F8
    4 COM1 3F8
    5 LPT2 278
    6 Floppy 3F0
    7 LPT1 378
    8 Floppy - DMA#2 070
    9 Interrupt 2
    10 Available
    11 Available (SCSI)
    12 Mouse 238
    13 Coprocessor 0F8
    14 IDE - Primary (DMA#3) 170
    15 IDE - Secondary


    Common Computer Ports
    Port I/O Address IRQ
    COM1 3F8 4
    COM2 2F8 3
    COM3 3E8 4
    COM4 2E8 3
    LPT1 378 7
    LPT2 278 5


    OHM's Law
    E = I x R
    (Voltage = Current x Resistance)

    P = I x E
    (Power = Current x Voltage)

    Power Supply Connectors

    XT/AT/LPX

    Connection Lead Description
    P8 1 Power Good (+5v)
    P8 Red 2 +5 v
    P8 Yellow 3 +12 v
    P8 Blue 4 -12 v
    P8 Black 5 Ground
    P8 Black 6 Ground
    P8 Black 7 Ground
    P8 Black 8 Ground
    P8 White 9 -5 v
    P8 Red 10 +5 v
    P8 Red 11 +5 v
    P8 Red 12 +5 v


    ATX

    +3.3v Orange 11 1 Orange +3.3v
    -12v Blue 12 2 Orange +3.3v
    Ground Black 13 3 Black Ground
    PS-ON Green 14 4 Red +5v
    Ground Black 15 5 Black Ground
    Ground Black 16 6 Red +5v
    Ground Black 17 7 Black Ground
    -5v White 18 8 Gray Power Good
    +5v Red 19 9 Purple +5v Standby
    +5v Red 20 10 Yellow +12v





    ----------------------------------------------------------------------------------------------------
    Extended Memory |
    (Size depends on amount of memory installed) |
    |
    High Memory Area |
    First 64k 1024-1088 |
    ---------------------------------------------------------------------------------------------------
    |
    BIOS Programs F0000 - FFFFF |
    |
    Reserved or Upper Memory (384k) |
    |
    Expanded memory between C0000 - EFFFF |
    (4 - 16k "pages") |
    |
    Network Cards C8000 |
    VGA/SVG ROM C0000 |
    Color Video B8000 |
    Monochrome Video B0000 |
    Video ROM A0000 |
    |
    ----------------------------------------------------------------------------------------------------
    Conventional Memory (640k) |
    DOS - First 64k |
    |
    |
    ----------------------------------------------------------------------------------------------------


    PCIMCIA Types

    Type Thickness Purpose

    Type | 3.3 mm Memory
    Type || 5 mm Modem
    Type ||| 10.5 mm Hard Drive


    Video Modes
    720 x 348 Monochrome (2 Colors)
    640 x 200 CGA (16 colors)
    640 x 350 EGA (16 colors)
    640 x 480 VGA (16 colors)
    1024 x 768 SVGA (16 colors)

    Color Memory Requirement: Vertical x Horizontal x Bits / 1,048,576

    BIOS Error Codes

    100 Motherboard
    200 Memory
    300 Keyboard
    400 Monochrome Video
    500 Color Video
    600 Floppy Drive
    700 Coprocessor
    900 Parallel Port
    1100 Motherboard
    1200 Motherboard
    1300 Game Port
    1400 Printer
    1700 Hard Drive
    6000 SCSI/Network
    7300 Floppy Drive
    8600 Mouse


    Hayes AT Modem Commands

    ATDT Tone Dialing
    ATDP Pulse Dialing
    ATA Answer
    ATH0 Hang Up
    AT&F Factory Reset
    ATZ Power Up Reset
    *70 Disable Call Waiting
    ATMn Turn Speaker On (1) or Off (0)
    ATLn Speaker Loudness 0 = Low
    1 = Low
    2 = Medium
    3 = High

    *Note: The n is for unknown number, not an actual n.



    BIOS "Beep Codes"

    Award Phoenix AMI

    Memory 1,2,4,1->3 1->3
    Timer 4
    Processor 5->7
    Video 1L, 2S 8
    ROM Checksum 1,2,3,3 9
    CMOS 10
    Cache 11



    Old IBM Codes

    # Of Beeps Problem

    1 then 3->5 System Board
    2 then 1st 64k of Memory
    3 then Keyboard/Video
    4 then Ports/Timer/Time of Day
    Continuous Power Supply

    Laser Printing Process

    Step EP HP
    1 Cleaning Cleaning
    2 Charging Conditioning
    3 Exposing Writing
    4 Developing Developing
    5 Transferring Transferring
    6 Fusing Fusing


    R.A.I.D.
    (Redundant Array of Independent Disks)

    Level Array Type Striping Parity

    RAID 0 Stripped Divided Blocks None
    *RAID 1 Mirrored None None
    RAID 2 Stripped-Parallel Bit None/Uses ECC**
    RAID 3 Stripped-Parallel with Parity Drive Divided Blocks Byte
    RAID 4 Stripped-Parallel with Parity Drive Block Block
    *RAID 5 Stripped/NO Parity Drive Block Rotating Block
    RAID 6 Stripped/NO Parity Drive Block Double Rotating Block

    * Most common
    ** Error Checking/Correction


    I've attached an A+ tutorial from TroyTech that has more information.

    Remote_Access_

  2. #2
    Old ancient one vanman's Avatar
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    Hi there Remote_Access_,

    I am glad you have posted this one,because i would like to ask you a question in connection with A+ if i may.My son is just about to finish his A+ course and i was wondering if you may suggest the next best course i could enroll him in.He is very interested in the line of programming and i thought A+ would be the ideal place to start him off.

    Any suggestions?
    Thanks in advance.

    regards
    v/man
    Practise what you preach.

  3. #3
    He is very interested in the line of programming and i thought A+ would be the ideal place to start him off.
    The next certification I'm working on after A+ is CCNA, but that has nothing to do with programming. It's a good place to start off don't get me wrong, but if you're doing software, don't spend 2 or more years learning about hardware. I'd say that the next best cource you could enroll him in is one that he's interested in.. like programming.

  4. #4
    Old ancient one vanman's Avatar
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    Thanks a lot remote_access_.Is it ok if i come to you for future advice?

    Greatly appreciated
    v/man
    Practise what you preach.

  5. #5
    Member
    Join Date
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    Posts
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    CCNA is where I'm headed too, now that I'm done with my A+ Certification. It's a very good certification, and I think everyone that uses a PC should atleast go through the course. It offers a comprehensive overview of the concepts behind, and the working of a PC along with common trouble-shooting tips.

    The next step for your son should be some of the developer courses. Get him to learn the languages, Java, C++, perl, VisualBasic etc. There should be more details offered by the centre where he recieved his A+ Training. There are many programming courses out there. Microsoft too has its MCAD ( Microsoft Certified Application Developer ) course, for which you can find details here . Ofcourse, this is a very professional course, not one for beginners.

    Find out where his interests are and set him the right direction. There are many languages out there, quite powerful ones too so don't worry about limited options. VB.NET is the talk of the town right now, so VB would be a good choice too.

    Cheers!
    I blame you cos my mind is not my own, so don't blame me if I trespass in your zone!

  6. #6
    Thanks a lot remote_access_.Is it ok if i come to you for future advice?
    Yup yup. Just PM me or look for me on irc. Like Reject said, ask the college or tech. center where he took his A+ class for more information on programming classes.

    Remote_Access_

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