Micro Channel Architecture

(redirected from MCA bus)

Micro Channel Architecture

(architecture)
(MCA) IBM's proprietary 32-bit bus, used in high-end PS/2 personal computers. Micro Channel is designed for multiprocessing. It eliminates potential conflicts that arise when installing new peripheral devices. MCA is *not* compatible with either EISA or XT bus architecture so older cards cannot be used with it.

As with the ROM BIOS in the first IBM PCs, figuring out the Micro Channel's secrets has been an arduous task of reverse engineering ever since the PS/2 line was announced. Consequently, the MCA has never become as wide spread as the competing EISA standard.
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References in periodicals archive ?
Other offerings in Proteon's Token Ring adapter product suite include the p1892plus for MCA bus types; the p1990plus for EISA bus types; and p1490 for PCMCIA.
SysKonnect's network adapters support PCI, EISA, ISA, SBus, NuBus and MCA bus structures.
The MCA bus model also features a new 32-bit MicroChannel address bus interface that improves performance in servers with more than 16 MBytes of main memory.
As corporations adopt newer technologies like PCI, switched Ethernet and Fast Ethernet, we're ideally positioned to meet all their adapter needs -- even for their installed base of MCA bus Pcs.