Micro Channel architecture

Micro Channel
Micro Channel architecture
MCA graphics card
IBM XGA-2 32-bit graphics card
Year created1987; 37 years ago (1987)[NB 1]
Created byIBM
SupersedesISA
Superseded byPCI (1993)
Width in bits16 or 32
Speed10 MHz
StyleParallel
Hotplugging interfaceNo
External interfaceNo
This article is about a computer bus. For small-sized liquid ducts, see Microchannel (microtechnology).
Two, 16 bit MCA slots (top and middle). At the bottom is an MCA slot for an IBM 8514 card.

Micro Channel architecture, or the Micro Channel bus, is a proprietary 16- or 32-bit parallel computer bus publicly introduced by IBM in 1987 which was used on PS/2 and other computers until the mid-1990s. Its name is commonly abbreviated as "MCA", although not by IBM. In IBM products, it superseded the ISA bus and was itself subsequently superseded by the PCI bus architecture.
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