PCI IDE ISA Xcelerator (PIIX), also known as Intel 82371, is a family of
Intel
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...
southbridge microchip
An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material, usually silicon. Large numbers of tiny ...
s employed in some Intel
chipset
In a computer system, a chipset is a set of electronic components
An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields. Electronic components are ...
s.
x86 virtualization
x86 virtualization is the use of hardware-assisted virtualization capabilities on an x86/x86-64 CPU.
In the late 1990s x86 virtualization was achieved by complex software techniques, necessary to compensate for the processor's lack of hardware-as ...
implementations often support emulations of various PIIX-based chipsets.
Versions
PIIX
The PIIX integrated an
IDE controller with two
8237 DMA controllers, the
8254 PIT, and two
8259
The Intel 8259 is a Programmable Interrupt Controller (PIC) designed for the Intel 8085 and Intel 8086 microprocessors. The initial part was 8259, a later A suffix version was upward compatible and usable with the 8086 or 8088 processor. The 8 ...
PICs and a
PCI
PCI may refer to:
Business and economics
* Payment card industry, businesses associated with debit, credit, and other payment cards
** Payment Card Industry Data Security Standard, a set of security requirements for credit card processors
* Pro ...
to
ISA bus bridge. It was introduced with the 430FX Triton chipset in 1995. The mobile version was introduced with the 430MX mobile Triton chipset.
The following variations existed:
*82371FB (PIIX)
*82371MX (MPIIX) Mobile
PIIX3
The PIIX3 introduced a
USB 1.0
Universal Serial Bus (USB) is an technical standard, industry standard that establishes specifications for cables, connectors and communication protocol, protocols for connection, communication and power supply (Interface (computing), interfa ...
controller and support for an external
I/O APIC. It was used with the
430HX and 430VX Triton II and
440FX northbridges.
The following variations existed:
*82371SB (PIIX3)
PIIX4
The PIIX4 introduced
ACPI
Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto c ...
support, an improved IDE controller with Ultra DMA/33 or ATA-4 support and an integrated a MC146818 style
RTC and
CMOS
Complementary metal–oxide–semiconductor (CMOS, pronounced "sea-moss", ) is a type of metal–oxide–semiconductor field-effect transistor (MOSFET) fabrication process that uses complementary and symmetrical pairs of p-type and n-type MOSFE ...
controller. It was used with the 430TX and the 440LX Balboa
northbridges. The PIIX4E updated the ACPI support. It was mainly used in
440BX and 440GX chipsets but 440EX, 440ZX, and 450NX chipsets also employed it. The mobile version was used in 440BX and 440ZX-M chipsets.
The following variations existed:
*82371AB (PIIX4) Base
*82371EB (PIIX4E) Enhanced
*82371MB (PIIX4M) Mobile
PIIX5
This seems to be a reference to the
Itanium
Itanium ( ) is a discontinued family of 64-bit Intel microprocessors that implement the Intel Itanium architecture (formerly called IA-64). Launched in June 2001, Intel marketed the processors for enterprise servers and high-performance computin ...
460GX ''I/O and Firmware Bridge'' (IFB) chipset component which has been referred to as 82372FB (PIIX5),
82468FB,
and finally FW82468GX (IFB).
See also
*
List of Intel chipsets
This article provides a list of motherboard chipsets made by Intel, divided into three main categories: those that use the PCI bus for interconnection (the 4xx series), those that connect using specialized "hub links" (the 8xx series), and those ...
*
Platform Controller Hub
The Platform Controller Hub (PCH) is a family of Intel's single-chip chipsets, first introduced in 2009. It is the successor to the Intel Hub Architecture, which used two chips - a Northbridge (computing), northbridge and Southbridge (computing), ...
(PCH)
*
System Controller Hub
System Controller Hub (SCH) is a family of Intel microchips employed in chipsets for low-power Atom-based platforms. Its architecture is consistent with the Intel Hub Architecture but combines the traditional northbridge and southbridge function ...
(SCH)
*
I/O Controller Hub
I/O Controller Hub (ICH) is a family of Intel southbridge microchips used to manage data communications between a CPU and a motherboard, specifically Intel chipsets based on the Intel Hub Architecture. It is designed to be paired with a second su ...
(ICH)
*
Super I/O
Super I/O is a class of I/O controller integrated circuits that began to be used on personal computer motherboards in the late 1980s, originally as add-in cards, later embedded on the motherboards. A super I/O chip combines interfaces for a vari ...
*
Northbridge (computing)
In computing, a northbridge (also host bridge, or memory controller hub) is one of two chips comprising the core logic chipset architecture on a PC motherboard. A northbridge is connected directly to a CPU via the front-side bus (FSB) to hand ...
*
Southbridge (computing)
The southbridge is one of the two chips in the core logic chipset on a personal computer (PC) motherboard, the other being the northbridge. The southbridge typically implements the slower capabilities of the motherboard in a northbridge/southbr ...
References
*
*
*
*
Intel products
Intel chipsets
{{Compu-hardware-stub