Most popular bussystems• Internal

– ISA / EISA– VLB– PCI– AGP

• External– USB– Firewire

ISA (1980)(Industry Standard

Architecture )

• 8-bit bus

• 16-bit bus (compatible to 8-bit)

ISA (1980)(Industry Standard

Architecture )• Graphiccards• Controllercards (storage)• Networkcards (MoDem, LAN)• Soundcards• Serial & parallel ports (com, lpt)• Replaced in new systems (PCI-

bus)

EISA (1988)(Extended Industry Standard

Architecture )• Extension of ISA-Standart• Bus-Mastering (direct

communication between cards)• Mainly used in Servers or network-

hosts• Compatible to ISA-Standart

32-bit EISA slot

16-bit ISA slot

Vesa-Local-Bus (VLB) (1992)(Video Electronics Standard

Association)• Compatible to ISA-standart• 32-bit bus• Mainly used for graphic- and videocards• extension of the 486 processor/memory

bus (only used in 486er systems)• Not established due to PCI-system in

connection with the Pentium-CPUs.

PCI (1993) (Peripheral Component Interconnect)

• Actual system standart• 32 and 64 bit bus (with Bus-

Mastering)• First system controlled by the

mainboards chipset• Usable for nearly all device cards

AGP (1997)(Accelerated Graphics Port)

• 64 bit bus• Used only for graphiccards• different modes:

– 1x standart– 2x double data rate per clock– 4x quad data rate per clock

• ability to share the main system memory with the video chipset

External Bus Systems

• USB 1.1• USB 2.0• Firewire 1 (i-link, IEEE 1394)• Firewire 2

USB 1.1 / 2.0(Universal Serial Bus)

• Hot plug Capability • Hot swap (PNP)• Built-in in all newer PCs• Built-in Power supply• Bandwith (max.): USB 1.1: 12Mbit / sec USB 2.0: 480Mbit / sec

Firewire 1 & 2

• Hot plug capability• Hot swap (PNP)• Requires additional controller• Built-in Power supply• Bandwith (max.): Fw 1: 100 / 200 / 400 Mbit / sec Fw 2: up to 3,2 Gbit / sec

Without power supply

With power supply

Thanks for listening

• Feel free to ask questions

Sources• http://www.pcguide.com/ref/mbsys/buses/types/index-i.htm• http://burks.brighton.ac.uk/burks/pcinfo/hardware/bios_sg/types.htm• http://dmoz.org/Computers/Hardware/Buses/• http://www.datareferral.com/pcbustypes.htm• http://directory.google.com/Top/Computers/Hardware/Buses/• http://a1computers.net/pcbustyp.htm• http://pcbug.org/hardware/equip/slottypes.htm• http://www.cs.dartmouth.edu/~cs37/lectures/lecture27/io7.htm• http://www.usb.org/developers/data/devclass/termt10.pdf• http://a1computers.net/TABLES1.HTM• http://www.interworx.com.au/users/matthewm/index.html• http://dmoz.org/Computers/Hardware/Buses/faq.html• http://www.dallascoach.com/bustype.html