©richard l. goldman 2001 1 personal computer system board architecture ©richard goldman june 24,...
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©Richard L. Goldman 20011
Personal Computer System Board Architecture
©Richard Goldman
June 24, 2001
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©Richard L. Goldman 20012
IDE 1IDE 2
RTCCMOS
COM 1COM 2
LPT 1FDD
Keyboard ROM BIOS
33MHz – 32bit
ISA8MHz – 16bit
PCI
South Bridge
North Bridge
Super IO
Main Memory
16MHz – 32bit EDO
CPUProcessor
L1L2
External Cache
66MHz – 64bit
P5 Class ProcessorPentium – Socket 7
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©Richard L. Goldman 20013
CPUProcessor
L1
66MHz – 64bit
L2
North Bridge
33MHz – 32bit
IDE 1IDE 2
RTCCMOS
COM 1COM 2
LPT 1FDD
Keyboard ROM BIOS
ISA8MHz – 16bit
PCI
South Bridge
Super IO
Main Memory
16MHz-32bit EDO-SIMM
66MHz-64bit SDRAM-DIMM
P6 Class ProcessorPentium Pro – Socket 8
Backside Bus
Discrete Cache
Frontside Bus
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©Richard L. Goldman 20014
Slot 1 Board
AGP
CPUProcessor
L1
USB
SystemMouse
66MHz – 32bit
66/100MHz – 64bit
66/100MHz – 64bit
L2
North Bridge
8MHz – 16bit
IDE 1IDE 2
RTCCMOS
COM 1COM 2
LPT 1FDD
Keyboard ROM BIOS
33MHz – 32bit
ISA
PCI
South Bridge
Super IO
Main Memory
P6 Class ProcessorPentium II – Slot 1
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©Richard L. Goldman 20015
AGP
IDE 1IDE 2
USBRTC
CMOS
COM 1COM 2
LPT 1FDD
66MHz – 32bit
33MHz – 32bit
ISA8MHz – 16bit
PCI
South Bridge
North Bridge
Super IO
Main Memory
SystemMouse
Keyboard ROM BIOS
CPUProcessor
L1
100/133MHz – 64bit
100/133MHz – 64bit
L2
P6 Class ProcessorPentium III – Socket PGA-370 ATC – Advance Transfer Cache
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©Richard L. Goldman 20016
Main MemoryRDRAM
400MHz-16bit-Channel 1
400MHz-16bit-Channel 2
CNR
USB4 ports
3.2GB/Sec (100MHz X 4 – 64bit)
IDEUDMA
100
FlashBIOS
AGP
66MHz(4X)-32bit
PCI 3233MHz-32bit
MemoryController
Hub
I/OController
Hub
Net Burst Class ProcessorPentium 4 (P4)Hub ArchitectureSocket PPGA 423
266MB/Sec
LAN
CPUProcessor
L1 L2
PCI 6466MHz
82866(P64H)
64bit
32bit
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©Richard L. Goldman 20017
Net Burst System Bus Speed
Specification• 100MHz Clock Speed• 64 bit Bus• 4X (4 bits transferred per clock cycle)
Transfer Rate:• 100 MHz X 4 = 400MHz• 400MHz X 64bits = 25,600Mbits/Sec• 25,600Mbits/Sec / 8bits/Byte = 3,200MBytes/Sec or
3.2GBytes/Sec3.2GBytes/Sec