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_
