Adding additional expansion slots for older motherboards could be accomplished by using a riser board, which would add several ISA or PCI slots. Today, riser boards are rarely used with motherboards, as there is limited need for additional expansion slots with modern motherboards. The ISA slot was the expansion method used for years. Today, PCIe rules the Market. For those who need to keep an old system running we have several offerings that should keep you running for some time to come. All standard chassis designs are here with offering different amounts and types of expansion and CPU support. An expansion slot refers to any of the slots on a motherboard that can hold an expansion card to expand the computer's functionality, like a video card, network card, or sound card. The expansion card is plugged directly into the expansion port so that the motherboard has direct access to the hardware. ACCES's PCI to ISA Bus Expansion Interconnect Kit, model PCI-ISA, allows you to expand your PCI Personal Computer system without timing or noise problems. It provides hardware transparent, active bus extension and conversion between a host computer’s PCI slot and a remote expansion chassis’ ISA backplane. The kit consists of two cards, a cable assembly, and a 3½' installation floppy disk.

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ISA may refer to any of the following:

1. Short for Industry Standard Architecture, ISA was introduced by IBM and headed by Mark Dean. ISA was originally an 8-bit computer bus that was later expanded to a 16-bit bus in 1984. When this bus was originally released, it was a proprietary bus, which allowed only IBM to create peripherals and the actual interface. However, in the early 1980s other manufacturers were creating the bus.

In 1993, Intel and Microsoft introduced a PnP ISA bus that allowed the computer to automatically detect and setup computer ISA peripherals, such as a modem or sound card. Using the PnP technology, an end-user would have the capability of connecting a device and not having to configure the device using jumpers or dip switches.

All modern computers no longer have ISA slots and instead utilizing PCI slots. Below is an example an ISA expansion card and ISA slot it connects into on the motherboard.

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How can I add an ISA card if I don't have an ISA slot?

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To connect an ISA card to a computer, the motherboard must have an ISA slot. As mentioned above, today's computers no longer come with ISA expansion slots and most modern operating systems no longer support ISA. If your motherboard does not have an ISA expansion slot, we recommend getting a more modern card supported by your motherboard.

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2. Short for instruction set architecture, see our instruction set definition for further information on this term.

16-bit, Bus, Computer acronyms, EISA, Expansion slot, Hardware terms, MCA, Motherboard terms