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하드웨어 3 : RAM

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하드웨어 3 : RAM. RAM 의 정의. Random Access Memory 순서대로 접근하는 것이 아니라 , 접근하고 싶은 곳에 바로 접근할 수 있는 기억장치라는 의미 CPU 가 처리할 데이터와 명령어가 임시로 저장되는 곳 읽고 쓰기가 가능한 메모리 기본은 DRAM – 컨덴서라는 반도체를 모아놓은 칩 RAM 의 발전단계 - PowerPoint PPT Presentation

Text of 하드웨어 3 : RAM

Chapter 1. Random Access Memory
,
CPU

RAM
PC

SDRAM -> 8~10ns
PC
RAM,
: .
: (Refresh) . Refresh . SRAM
Static RAM (SRAM)
: Refresh .
: .
Cache (CPU L1, L2 cache)
PC
SRAM DRAM
SRAM DRAM
SRAM (Static RAM)
DRAM (Dynamic RAM)
    DRAM . CPU Cache
. Refresh (ns) SRAM SRAM .
PC
1 1 – 1
) 100MHz -> 1 100,000,000

64
i845
PC

1 2 – 0->1, 1->0

PC
RDRAM (Rambus DRAM)
DRAM
DDR
400 800MHz DDR
16 32

PC600, PC800, PC1066 ->16
RIMM3200, RIMM4200 -> 32
4 400MHz
PC
32bit
32bit
64bit
64bit
32bit 72
64bit 168
SIMM, DIMM
SODIMM (Small Outline DIMM)
DRAM (DRAM )
DRAM

, FSB RAM .

1 512M > 2 256M
PC
RAM
VRAM : . DRAM . .
WRAM : VRAM ,
.
SGRAM(Synchronous Graphic RAM) : 3D . SDRAM , 125MHz 143MHz , 6-8ns .
PC
ROM(Read Only Memory)

BIOS
PC
PROM, EPROM, EEPROM
EEPROM
PC
(FLASH  MEMORY)
RAM .
ROM(Read Only Memory) .
RAM ROM Flash Memory.
RAM , ROM .
: , BIOS
, , , ,(PDA, ·, MP3 ) .
, (). EPROM EPROM 1 , . .
PC
.
(MD: Micro Drive Type)
.
SD(Secure Digital Card)
, .
PC
MMC(Multimedia Card)
(Sandisk) (Siemens) 1997 11 . MMC , , PDA, , , , MP3, . .
PC
PC
4 : HDD
PC



.
CPU 1(on) 0(off) .
/ .
PC
:
: .
HDD :
PC

: HDD PCB .
PC

: ( ) .
:
:
:
PC

.
.
01 .
PC
1 )
IDE : 7200RPM
HDD :
.

.
.
10~15nm.
PC
EIDE : Enhanced Integrated Drive Electronics
ATA
Plug &Play , LBA
: 4
Serial ATA : Serial Advanced Technology Attachment
ATA
150MB/s
PC
SCSI : Small Computer System Interface
: SCSI CPU CPU .
: 7~15
:

5-160MB/sec
.(512KB ~ 16MB)
.
PC
Low Level Format
, (, , ) .
. Virus
HDD .
HDD Utility .
PC




PC
5 : FDD
= (diskette) : (disk) (jacket)
: 300RPM 0.2
.
.
PC
2. : CD
3. :
4. :
PC
:
:
PC
CD : CD
CD-R : CD Recordable.
CD CD-ROM CD-R
CD-RW : CD Re-Writable.
(Max:1000)
( ) –
PC
CD-ROM (CD )
CD/CD-ROM
1
0
: CD
:
:
:
: CD-ROM CD-ROM
: CD-ROM
PC
CD .
– , 17GB
PC
DVD-RAM(DVD Random Access Memory) : DVD
DVD-R (DVD Recordable) : DVD
DVD-ROM (DVD disc-read only memory ) : CD-ROM
DVD-R/W (DVD ReWritable ) :
PC
: 150KB/s (1)
DVD

CD-RW : CD-R /CD-RW /CD-RW
DVD : DVD /CD
PC
CD DVD

CD-ROM
CD-RW
DVD-ROM

Code 1 :
Code 2 : , , , ( )
Code 3 : , , ( )
Code 4 : , , , , ,
Code 5 : , , , ,
Code 6 :
PC

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