I/O CONTROLLER HUB

'I/O CONTROLLER Hub' ('ICH') is the name for the microchip
'Intel 82801', which works as southbridge on motherboards
with Intel chipsets (Intel Hub Architecture). It is used to
tie up peripheral devices.

Contents

ICH/ICH0 (82801AA/AB)

ICH2 (82801BA/BAM)

ICH3 (82801CA/CAM)

ICH4 (82801DB/DBM)

ICH5 (82801EB/ER)

ICH6 (82801FB/FR/FBM)

ICH7 (82801GB/GR)

ICH8 (82801HB/HR/HDH/HDO)

ICH9 (82801IR)

ICH/ICH0 (82801AA/AB)

The i82801 was created in 1998 as Southbridge for future chipsets
based on the successful BX northbridge 82443. In contrast with
its predecessor 82371 (PIIX), the 82801 was no more just an internal
PCI bus with 133 MByte/s. Instead,
and using a proprietary interface (called by Intel ''Hub interface''),
it had an 8-bit wide, 266 MByte/s bus attached to the Northbridge.
The Hub interface was a point-to-point connection between different
components on the motherboard. Ulterior motive was to come away
from the rigid North-South axis on the motherboard to a rather star
shaped oriented structure. Parallel to ICH, numerous further of "Hub"
were developed: The past Northbridge became the Memory Controller Hub
(MCH).
The 82801AB ICH0 was limited to ATA/33 and four PCI devices and
controlled none