PC / 104

PCI-104 module with PowerPC CPU

Overview of the different variants

PC / 104 is a standard and form factor in the electronics industry for PC-compatible modules that can be plugged together to form a complex computing system.

The first version was published in 1992 by the PC / 104 consortium. This standard defines the module size, the location of possible expansion connections and the meaning of the pins of the ISA- compatible PC / 104 connector. The modules with a PCB size of 90.17 mm x 95.89 mm (3.550 "× 3.775") can be placed directly above one another, so that a bus backplane ( backplane may be omitted).

The name is derived from the " Personal Computer " (PC) system developed by IBM and the number of connection pins (104) on the module connector.

With the availability of more powerful components, the expansion of the PC / 104 system with a faster bus system has also become necessary. In 1997 the PCI bus was added to PC / 104 and further developed; it was called PC / 104-Plus . In 2003 PCI-104 was introduced. The connector for the ISA bus was completely omitted here and only the connector for PCI was used. In 2008 PCI / 104 Express and PCIe / 104 were introduced. There, a connector for PCI Express and other interfaces, such as, for example , was installed at the position of the earlier ISA connector . B. USB or SATA introduced. PCI / 104 Express still has the PCI connector, while PCIe / 104 only uses the one for PCI Express. There are two different connector specifications for PCIe / 104 : Type 1 and Type 2. While the former has a PCI Express interface with 16 lanes, for Type 2 signals such as SATA, USB 3.0 and LPC are available instead . In 2015, a "Onebank" variant was introduced for PCI / 104-Express and PCIe / 104 . This uses a smaller, less expensive bus connector that is compatible with the full-size PCIe / 104 connector used and thus creates space for additional components on the board.

The form factors EBX and EPIC also provide for the use of PC / 104-compatible modules.

In 2006, global sales of PC / 104 modules were still US $ 80.1 million compared to PC / 104-Plus modules with US $ 22.5 million.

Overview of the different PC / 104 variants

	year	ISA	PCI	PCI Express			USB		SMB	SATA	LPC	RTC battery	Tensions
				x16	x4	x1	2.0	3.0					+3.3V	+5 V	−5 V	+12 V	−12 V
PC / 104	1992	1
PC / 104-plus	1997	1	1
PCI-104	2003		1
PCI / 104-Express	2008		1	1		4th	2		1
PCI / 104-Express OneBank	2015					4th	2		1
PCIe / 104 Type 1	2008			1		4th	2		1
PCIe / 104 Type 2	2008				2	4th		2	1	2	1	1
PCIe / 104 onebank	2015					4th	2		1

• various PC / 104 boards
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  Single board computer with PC / 104, socket 3 and Ali chipset

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  Slot-CPU with i386SX-compatible ALi M6117C for the ISA bus and with connection for PC / 104

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  PC / 104 CPU module with i386SX compatible DM & P M6117D plugged into a PC / 104 NE2000 - NIC

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  PC / 104-plus-CPU module with Embedded Pentium MMX 166 MHz ( Tillamook )

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  PCIe / 104 onebank module with an FPGA from Xilinx

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  A stack of multiple PCIe / 104 onebank modules

Individual evidence

1. ↑ SPECIFICATIONS - PCI / 104 Express. (No longer available online.) Archived from the original on January 3, 2015 ; accessed on February 1, 2015 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  
2. ↑ Holger Heller: OneBank option for PCI / 104-Express and PCIe / 104. In: ELEKTRONIKPRAXIS. Vogel Business Media GmbH & Co. KG, February 15, 2015, accessed on June 25, 2015 . 
3. ↑ Elektronik, trade journal for industrial users and developers, April 17, 2007

Web links

Commons : PC / 104  - collection of pictures, videos and audio files

• Specifications of the PC / 104 Consortium (English)